Dirty Form Error Trapping?

19 Message(s) by 9 Author(s) originally posted in php programming

From: Fester Bestertester

Date: Monday, October 22, 2007

Greetings,

I'm an occasional php/mysql dabbler.

I have a basic data

<data, data processing, jargon> /day't*/ (Or "raw data")
	Numbers, {characters}, {images}, or other method of recording,
	in a form which can be assessed by a human or (especially)
	input into a {computer}, stored and {processed} there, or
	transmitted on some {digital channel}.  Computers nearly
	always represent data in {binary}.

	Data on its own has no meaning, only when interpreted by some
	kind of {data processing system} does it take on meaning and
	become {information}.

	People or computers can find patterns in data to perceive
	information, and information can be used to enhance
	{knowledge}.  Since knowledge is prerequisite to wisdom, we
	always want more data and information.  But, as modern
	societies verge on {information overload}, we especially need
	better ways to find patterns.

	1234567.89 is data.

	"Your bank balance has jumped 8087% to $1234567.89" is
	information.

	"Nobody owes me that much money" is knowledge.

	"I'd better talk to the bank before I spend it, because of
	what has happened to other people" is wisdom.

	(1999-04-30)

form with a submit button

1. <electronics> {push-button}.

	2. <operating system> A graphical representation of an
	electrical {push-button} appearing as part of a {graphical
	user interface}.  Moving the {mouse pointer} over the
	graphical button and pressing one of the physical mouse
	buttons starts some software action such as closing a window
	or deleting a file.

	See also {radio button}.

	(1997-07-07)

. Unfortunately, it's still
possible for the user to enter data changes and close the window,
without click

<hardware> To press and release a {button} on a {mouse} or
	other {pointing device}.  This generates an {event}, also
	specifying the screen position, which is processed by the
	{window manager} or {application program}.  On a mouse with
	more than one button, the unqualified term usually implies
	pressing the left-most button (with the right index finger),
	other buttons would be qualified, e.g. "{right-click}".
	{Keyboard} modifiers may also be used, e.g. "shift-click",
	meaning to hold down the shift key on the keyboard while
	clicking the mouse button.

	If the mouse moves while the button is pressed then this is a
	{drag}.

	(1995-03-14)

ing the submit button, thus losing

<jargon> Said of anything that is or causes a {lose} or
	{lossage}.

	[{Jargon File}]

the data.

Can someone point

1. <unit, text> (Sometimes abbreviated "pt") The unit of
	length used in {typography} to specify text character height,
	{rule} width, and other small measurements.

	There are six slightly different definitions: {Truchet point},
	{Didot point}, {ATA point}, {TeX point}, {Postscript point},
	and {IN point}.

	In Europe, the most commonly used is Didot and in the US, the
	formerly standard ATA point has essentially been replaced by
	the PostScript point due to the demise of traditional
	typesetting systems and rise of desktop computer based systems
	running software such as {QuarkXPress}, {Adobe InDesign} and
	{Adobe Pagemaker}.

	There are 20 {twips} in a point and 12 points in a {pica}
	(known as a "Cicero" in the Didot system).

	{Different point systems
	(http://www.vakcer.com/oberon/dtp/fonts/point.htm)}.

	(2004-12-23)

	2. <hardware> To move a {pointing device} so that the
	on-screen pointer is positioned over a certain object on the
	screen such as a {button} in a {graphical user interface}.  In
	most {window systems} it is then necessary to {click} a
	(physical) button on the pointing device to activate or select
	the object.  In some systems, just pointing to an object is
	known as "mouse-over" {event} which may cause some help text
	(called a "tool tip" in {Windows}) to be displayed.

	(2001-05-21)

me to a generic example of some code

<software> Instructions for a computer in some programming
	language, often {machine language}.  The word "code" is often
	used to distinguish instructions from {data} (e.g. "The code
	is marked 'read-only'") whereas "{software}" is used in
	contrast with "{hardware}" and may consist of more than just
	code.

	(2000-04-08)

that will trap

1. A program interrupt, usually an interrupt caused by some
	exceptional situation in the user program.  In most cases, the
	OS performs some action, then returns control to the program.

	2. To cause a trap.  "These instructions trap to the monitor."
	Also used transitively to indicate the cause of the trap.
	"The monitor traps all input/output instructions."

	This term is associated with assembler programming
	("interrupt" or "exception" is more common among {HLL}
	programmers) and appears to be fading into history among
	programmers as the role of assembler continues to shrink.
	However, it is still important to computer architects and
	systems hackers (see {system}, sense 1), who use it to
	distinguish {deterministic}ally repeatable exceptions from
	timing-dependent ones (such as I/O interrupts).

	[{Jargon File}]

and handle

1. <programming, operating system> A simple item of data that
	identifies a resource.  For example, a {Unix} file handle
	identifies an open file and associated data such as whether it
	was opened for read or write and the current read/write
	position.  On the {Macintosh}, a handle is a pointer to a
	pointer to some dynamically-allocated memory.  The extra level
	of indirection allows on-the-fly {memory compaction} or
	{garbage collection} without invalidating application program
	references to the allocated memory.

	2. <jargon> An alias used intended to conceal a user's true
	identity in an electronic message.  The term is common on
	Citizen's Band and other amateur radio but, in that context
	usually means the user's real name as {FCC} rules forbid
	concealing one's identity.

	Use of grandiose handles is characteristic of {crackers},
	{weenies}, {spods}, and other lower forms of network life;
	true hackers travel on their own reputations.

	Compare {nick}.

	[{Jargon File}]

	(2004-07-20)

this error?

From: McKirahan

Date: Monday, October 22, 2007

wrote in message

Greetings,
I'm an occasional php/mysql dabbler.
I have a basic data form with a submit button. Unfortunately, it's still
possible for the user to enter data changes and close the window,
without clicking the submit button, thus losing the data.
Can someone point me to a generic example of some code that will trap
and handle this error?

How is the user's choice of closing the window an error?

Is a "Close Window" button next to the "Submit Form" button?

From: Jerry Stuckle

Date: Monday, October 22, 2007

wrote in message:

Greetings,
I'm an occasional php/mysql dabbler.
I have a basic data form with a submit button. Unfortunately, it's still
possible for the user to enter data changes and close the window,
without clicking the submit button, thus losing the data.
Can someone point me to a generic example of some code that will trap
and handle this error?

Nope. There isn'thing you can do in PHP (which is server

1. A program which provides some service to other ({client})
	programs.  The connection between client and server is
	normally by means of {message passing}, often over a
	{network}, and uses some {protocol} to encode the client's
	requests and the server's responses.  The server may run
	continuously (as a {daemon}), waiting for requests to arrive
	or it may be invoked by some higher level daemon which
	controls a number of specific servers ({inetd} on {Unix}).

	There are many servers associated with the {Internet}, such as
	those for {HTTP}, {Network File System}, {Network Information
	Service} (NIS), {Domain Name System} (DNS), {FTP}, {news},
	{finger}, {Network Time Protocol}.  On Unix, a long list can
	be found in /etc/services or in the {NIS} database "services".
	See {client-server}.

	2. A computer which provides some service for other computers
	connected to it via a network.  The most common example is a
	{file server} which has a local disk and services requests
	from remote clients to read and write files on that disk,
	often using {Sun}'s {Network File System} (NFS) {protocol} or
	{Novell Netware} on {PCs}.  Another common example is a {web
	server}.

	[{Jargon File}]

	(2003-12-29)

side) to
prevent the user from performing client-side functions such as closing a
window.

But that also shouldn't be considered an error. It should be
considered normal operation, and your script should handle it nicely.

--
==================
Remove the "x" from my email address

1. <networking> {e-mail address}.

	2. <networking> {Internet address}.

	3. <networking> {MAC address}.

	4. <storage, programming> An unsigned integer used to select
	one fundamental element of storage, usually known as a {word}
	from a computer's {main memory} or other storage device.  The
	{CPU} outputs addresses on its {address bus} which may be
	connected to an {address decoder}, {cache controller}, {memory
	management unit}, and other devices.

	While from a hardware point of view an address is indeed an
	integer most {strongly typed} programming languages disallow
	mixing integers and addresses, and indeed addresses of
	different data types.  This is a fine example for {syntactic
	salt}: the compiler could work without it but makes writing
	bad programs more difficult.

	(1997-07-01)

Jerry Stuckle
JDS Computer

<computer> A machine that can be programmed to manipulate
	symbols.  Computers can perform complex and repetitive
	procedures quickly, precisely and reliably and can quickly
	store and retrieve large amounts of data.

	The physical components from which a computer is constructed
	(electronic circuits and input/output devices) are known as
	"{hardware}".  Most computers have four types of hardware
	component: CPU, input, output and memory.  The CPU ({central
	processing unit}) executes programs ("{software}") which tell
	the computer what to do.  Input and output (I/O) devices allow
	the computer to communicate with the user and the outside
	world.  There are several kinds of memory - fast, expensive,
	short term memory (e.g. {RAM}) to hold intermediate results,
	and slower, cheaper, long-term memory (e.g. {magnetic disk} and
	{magnetic tape}) to hold programs and data between jobs.

	See also {analogue computer}.

	(1995-03-10)

Training Corp.
jstucklex@xxxxxxxxxxx
==================

From: Fester Bestertester

Date: Monday, October 22, 2007

wrote in message:

How is the user's choice of closing the window an error?
Is a "Close Window" button next to the "Submit Form" button?

Thanks for replying. There is no Close Window button. I think it's just
a matter of making it clear to the users that this web db app

<programming, operating system> (Or "application", "app") A
	complete, self-contained program that performs a specific
	function directly for the user.  This is in contrast to system
	software such as the {operating system} {kernel}, {server}
	processes and libraries which exists to support application
	programs.

	Editors for various kinds of documents, {spreadsheets}, and
	text formatters are common examples of applications.  Network
	applications include clients such as those for {FTP},
	{electronic mail}, {telnet} and {WWW}.

	The term is used fairly loosely, for instance, some might say
	that a client and server together form a distributed
	application, others might argue that editors and compilers
	were not applications but tools for building applications.

	One distinction between an application program and the
	operating system is that applications always run in "user
	mode" (or "non-privileged mode"), while operating systems and
	related utilities may run in "supervisor mode" (or "privileged
	mode").

	The term may also be used to distinguish programs which
	communicate via a {graphical user interface} from those which
	are executed from the {command line}.

	(1994-11-28)

works like
any other, i.e., if you go to your bank's web site, log on, and set up a
transaction

A unit of interaction with a {DBMS} or similar system.  It
	must be treated in a coherent and reliable way independent of
	other transactions.  See {atomic}.

to transfer some funds, but you do not click the "Commit"
button and instead just close the window, your transaction isn't
completed. That should not be too hard to handle.

From: Fester Bestertester

Date: Monday, October 22, 2007

wrote in message:

Nope. There isn'thing you can do in PHP (which is server side) to
prevent the user from performing client-side functions such as closing a
window.
But that also shouldn't be considered an error. It should be
considered normal operation, and your script should handle it nicely.

Thanks for responding. As I stated in my other response, I suppose it's
like any other web app. If the user clicks the browser's 'x' button
before clicking the submit button, the changes are lost. That's the way
our hr web/db app works.

But, as you state, "...your script should handle it nicely." I'm not
sure, how'd this work exactly?'d it plant a cookie

1. <World-Wide Web> {HTTP cookie}.

	2. <protocol> A handle, transaction ID, or other token of
	agreement between cooperating programs.  "I give him a packet,
	he gives me back a cookie".

	The ticket you get from a dry-cleaning shop is a perfect
	mundane example of a cookie; the only thing it's useful for is
	to relate a later transaction to this one (so you get the same
	clothes back).

	Compare {magic cookie}; see also {fortune cookie}.

	3. <security, jargon> A {cracker} term for the {password} list
	on a {multi-user} computer.

	4. <jargon> An adjective describing a computer that just
	became {toast}.

	(1997-04-14)

and show the
user a message?

From: The Natural Philosopher

Date: Monday, October 22, 2007

wrote in message:

Greetings,
I'm an occasional php/mysql dabbler.
I have a basic data form with a submit button. Unfortunately, it's still
possible for the user to enter data changes and close the window,
without clicking the submit button, thus losing the data.
Can someone point me to a generic example of some code that will trap
and handle this error?

Only way is via JAVAscript.

Something like "onunload submit".

But the syntax

The structure of strings in some language.  A language's
	syntax is described by a {grammar}.  For example, the syntax
	of a binary number could be expressed as

		binary_number = bit [ binary_number ]

		bit = "0" | "1"

	meaning that a binary number is a bit optionally followed by a
	binary number and a bit is a literal zero or one digit.

	The meaning of the language is given by its {semantics}.

	See also {abstract syntax}, {concrete syntax}.

	(1994-10-31)

is far more complex.

Another way to achieve what you want is to use JAVAscript to submit the
form any time anything changes using teh onchange function.

From: Jerry Stuckle

Date: Monday, October 22, 2007

wrote in message:
wrote in message:
Nope. There isn'thing you can do in PHP (which is server side) to
prevent the user from performing client-side functions such as closing
a window.

But that also shouldn't be considered an error. It should be
considered normal operation, and your script should handle it nicely.
Thanks for responding. As I stated in my other response, I suppose it's
like any other web app. If the user clicks the browser's 'x' button
before clicking the submit button, the changes are lost. That's the way
our hr web/db app works.
But, as you state, "...your script should handle it nicely." I'm not
sure, how'd this work exactly?'d it plant a cookie and show the
user a message?

Well, for instance

<programming> An individual {object} of a certain {class}.
	While a class is just the type definition, an actual usage of
	a class is called "instance".  Each instance of a class can
	have different values for its {instance variables}, i.e. its
	{state}.

	(1998-03-06)

, do not put in 1/2 an update when they click the first
window, then expect

<language, tool> A {Unix} tool written in {Tcl} and a {script
	language} for automating the operation of {interactive}
	applications such as {telnet}, {FTP}, {passwd}, {fsck},
	{rlogin}, {tip}, etc..  Expect can feed input to other
	programs and perform {pattern matching} on their output.  It
	is also useful for testing these applications.  By adding
	{Tk}, you can also wrap interactive applications in {X11}
	{GUIs}.

	{Home (http://expect.nist.gov/)}.

	["expect: Scripts for Controlling Interactive Tasks", Don
	Libes, Comp Sys 4(2), U Cal Press Journals, Nov 1991].

	(1997-06-09)

to finish the update when they click on the second
window. Wait until all the data is present, then insert it.

And do not laugh - I have seen this done before!

And like you said - just let them know if they do not finish, the data
won't be updated.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@xxxxxxxxxxx
==================

From: Jerry Stuckle

Date: Monday, October 22, 2007

wrote in message:
wrote in message:
Greetings,

I'm an occasional php/mysql dabbler.

I have a basic data form with a submit button. Unfortunately, it's
still possible for the user to enter data changes and close the
window, without clicking the submit button, thus losing the data.

Can someone point me to a generic example of some code that will trap
and handle this error?
Only way is via JAVAscript.
Something like "onunload submit".
But the syntax is far more complex.
Another way to achieve what you want is to use JAVAscript to submit the
form any time anything changes using teh onchange function.

Terrible advice. What happens if they put in 1/2 of the data they want
to update, then have to close because they get called away?

Or, if it updates on the fly like you suggest, they update one field

<data, database> An area of a {database} {record}, or
	{graphical user interface} {form}, into which a particular
	item of data is entered.

	Example usage: "The telephone number field is not really a
	numerical field", "Why do we need a four-digit field for the
	year?".

	A {database} {column} is the set of all instances of a given
	field from all records in a {table}.

	(1999-04-26)

and
the system

1. The {supervisor} program or {operating system} on a
	computer.

	2. The entire computer system, including input/output devices,
	the {supervisor} program or {operating system} and possibly
	other {software}.

	3. Any large program.

	4. Any method or {algorithm}.

	[{Jargon File}]

crashes, the power goes out, the internet connection drops -
whatever.

Someone trying to enter a new address comes to mind. You want all of
the changes or none of the changes.--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@xxxxxxxxxxx
==================

From: The Natural Philosopher

Date: Monday, October 22, 2007

wrote in message:
wrote in message:
wrote in message:
Greetings,
I'm an occasional php/mysql dabbler.
I have a basic data form with a submit button. Unfortunately, it's
still possible for the user to enter data changes and close the
window, without clicking the submit button, thus losing the data.
Can someone point me to a generic example of some code that will trap
and handle this error?
Only way is via JAVAscript.

Something like "onunload submit".

But the syntax is far more complex.

Another way to achieve what you want is to use JAVAscript to submit
the form any time anything changes using teh onchange function.

Terrible advice. What happens if they put in 1/2 of the data they want
to update, then have to close because they get called away?

That depends. In some cases that is desirable behaviour, if the fields
are somewhat independent.

Oherwise an alert

<operating system> /*'l*rt/ An audible and/or visual message
	intended to inform a system's users or administrators about a
	change in the operating conditions of that system or about
	some kind of error condition.  In a {graphical user
	interface}, an alert would typically be displayed as a small
	window containing the message and a button to click to dismiss
	the window.

	(1999-03-29)

box

<computer> 1. A computer; especially in the construction "foo
	box" where foo is some functional qualifier, like "graphics",
	or the name of an {operating system} (thus, "{Unix} box",
	"{MS-DOS} box", etc.)  "We preprocess the data on Unix boxes
	before handing it up to the {mainframe}."  The plural
	"{boxen}" is sometimes seen.

	2. Without qualification in an {IBM} {SNA} site, "box" refers
	specifically to an {IBM} {front-end processor}.

	[{Jargon File}]

	(1994-11-29)

on unloading, and ask them if they want to scrap
the data they have entered..> Or, if it updates on the fly like you suggest, they update one field and

the system crashes, the power goes out, the internet connection drops -
whatever.

No problem really..it depends if the form comprises an atomic

<jargon> (From Greek "atomos", indivisible) Indivisible;
	cannot be split up.

	For example, an instruction may be said to do several things
	"atomically", i.e. all the things are done immediately, and
	there is no chance of the instruction being half-completed or
	of another being interspersed.  Used especially to convey that
	an operation cannot be interrupted.

	An atomic {data type} has no internal structure visible to the
	program.  It can be represented by a flat {domain} (all
	elements are equally defined).  Machine {integers} and
	{Booleans} are two examples.

	An atomic {database transaction} is one which is guaranteed to
	complete successfully or not at all.  If an error prevents a
	partially-performed transaction from proceeding to completion,
	it must be "backed out" to prevent the database being left in
	an inconsistent state.

	[{Jargon File}]

	(2000-04-03)

transaction. Lots don't.

Someone trying to enter a new address comes to mind. You want all of
the changes or none of the changes.

Dunno. Here just changing the postcode woul probably be enough ;-)

However if you want an atomic transaction, use onchange to set a flag

1. <programming> A variable or quantity that can take on one
	of two values; a bit, particularly one that is used to
	indicate one of two outcomes or is used to control which of
	two things is to be done.  "This flag controls whether to
	clear the screen before printing the message."  "The program
	status word contains several flag bits."  See also {hidden
	flag}, {mode bit}.

	2. {command line option}.

	[{Jargon File}]

	(1998-05-02)

,
and submit to clear it, and on unload if the flag is still set, issue
warning.

Its fairly standard

<standard> Standards are necessary for {interworking},
	{portability}, and {reusability}.  They may be {de facto
	standards} for various communities, or officially recognised
	national or international standards.

	{Andrew Tanenbaum}, in his Computer Networks book, once said,
	"The nice thing about standards is that there are so many of
	them to choose from", a reference to the fact that competing
	standards become a source of confusion, division,
	obsolescence, and duplication of effort instead of an
	enhancement to the usefulness of products.

	Some bodies concerned in one way or another with computing
	standards are {IAB} ({RFC} and {STD}), {ISO}, {ANSI}, {DoD},
	{ECMA}, {IEEE}, {IETF}, {OSF}, {W3C}.

	(1999-07-06)

JAVAscript.

From: Lars Eighner

Date: Monday, October 22, 2007

In our last episode, <ffik1p$n5g$1@xxxxxxxxxxx>, the lovely and talented
Fester Bestertester broadcast

A transmission to multiple, unspecified recipients.  On
	Ethernet, a broadcast packet is a special type of multicast
	packet which all nodes on the network are always willing to
	receive.

on comp.lang.php:

Greetings,

I'm an occasional php/mysql dabbler.

I have a basic data form with a submit button. Unfortunately, it's still
possible for the user to enter data changes and close the window,
without clicking the submit button, thus losing the data.

Can someone point me to a generic example of some code that will trap
and handle this error?

No PHP solution

<jargon> A {marketroid} term for something he wants to sell
	you without bothering you with the often dizzying distinctions
	between {hardware}, {software}, {services}, {applications},
	{file formats}, companies, brand names and {operating
	systems}.

	"{Flash} is a perfect image-streaming solution."  "What is
	it?"  "Um...  about a thousand dollars."

	See also: {technology}.

	(1998-07-07)

is possible to this problem. PHP works server-side. It has
no way of knowing what occurs in the browser. All can ever know is what
data is posted, and if the user doesn't submit the data, PHP must know
nothing.

--
Lars Eighner <http://larseighner.com/> <http://myspace.com/larseighner>
Countdown: 455 days to go.
What do you do when you're debranded?

From: Jerry Stuckle

Date: Monday, October 22, 2007

wrote in message:
wrote in message:
wrote in message:
wrote in message:
Greetings,

I'm an occasional php/mysql dabbler.

I have a basic data form with a submit button. Unfortunately, it's
still possible for the user to enter data changes and close the
window, without clicking the submit button, thus losing the data.

Can someone point me to a generic example of some code that will
trap and handle this error?
Only way is via JAVAscript.
Something like "onunload submit".
But the syntax is far more complex.
Another way to achieve what you want is to use JAVAscript to submit
the form any time anything changes using teh onchange function.
Terrible advice. What happens if they put in 1/2 of the data they
want to update, then have to close because they get called away?

That depends. In some cases that is desirable behaviour, if the fields
are somewhat independent.
Oherwise an alert box on unloading, and ask them if they want to scrap
the data they have entered..

And if they have a power failure, their internet goes down, their
browser crashes... Now what do they do?

Or, if it updates on the fly like you suggest, they update one field
and the system crashes, the power goes out, the internet connection
drops - whatever.

No problem really..it depends if the form comprises an atomic
transaction. Lots don't.

True. Many don't comprise an atomic transaction. So updating only
part of the data is very bad.

Someone trying to enter a new address comes to mind. You want all of
the changes or none of the changes.

Dunno. Here just changing the postcode woul probably be enough ;-)

Is it? What happens if I enter a new street address and the system goes
down? What happens to the city, state, postal code...

However if you want an atomic transaction, use onchange to set a flag,
and submit to clear it, and on unload if the flag is still set, issue
warning.
Its fairly standard JAVAscript.

Which does you absolutely no good if you've one of the problems noted
above.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@xxxxxxxxxxx
==================

From: Jeff North

Date: Tuesday, October 23, 2007

On Mon, 22 Oct 2007 09:45:31 -0700, in comp.lang.php Fester
Bestertester <whatmeworry@xxxxxxxxxxx>
wrote in message:

| Greetings,
|
| I'm an occasional php/mysql dabbler.
|
| I have a basic data form with a submit button. Unfortunately, it's still
| possible for the user to enter data changes and close the window,
| without clicking the submit button, thus losing the data.

I'd be asking why the users are doing this then find a solution.

| Can someone point me to a generic example of some code that will trap
| and handle this error?

-- -------------------------------------------------------------
jnorthau@xxxxxxxxxxx : Remove your pants to reply
-- -------------------------------------------------------------

From: Captain Paralytic

Date: Tuesday, October 23, 2007

wrote in message:
wrote in message:
> Greetings,
> I'm an occasional php/mysql dabbler.
> I have a basic data form with a submit button. Unfortunately, it's still
> possible for the user to enter data changes and close the window,
> without clicking the submit button, thus losing the data.
> Can someone point me to a generic example of some code that will trap
> and handle this error?
Only way is via JAVAscript.
Something like "onunload submit".

Some sites (Google

<World-Wide Web> The {World-Wide Web} {search engine} that
	indexes the greatest number of web pages - over two billion by
	December 2001 and provides a free service that searches this
	index in less than a second.

	The site's name is apparently derived from "{googol}", but
	note the difference in spelling.

	The "Google" spelling is also used in "The Hitchhikers Guide
	to the Galaxy" by Douglas Adams, in which one of Deep
	Thought's designers asks, "And are you not," said Fook,
	leaning anxiously foward, "a greater analyst than the
	Googleplex Star Thinker in the Seventh Galaxy of Light and
	Ingenuity which can calculate the trajectory of every single
	dust particle throughout a five-week Dangrabad Beta sand
	blizzard?"

	{Home (http://www.google.com/)}.

	(2001-12-28)

Groups and the BBC

<company> (BBC) The non-commercial UK organisation that
	commissions, produces and broadcasts television and radio
	programmes.

	The BBC commissioned the "{BBC Micro}" from {Acorn Computers}
	for use in a television series about using computers.  They
	also have one of the world's most respected news websites (on
	which I work!).

	{BBC Home (http://www.bbc.co.uk/)}.

	{BBC News (http://news.bbc.co.uk/)}.

	(2003-07-02)

Radio Player are examples), will
pop up a JAVAsript cofirmation dialogue if you try to leave the page
having already typed information in (in thecase of Google Groups), or
have selected a radio programme to listen to (in he case of the BBC
Radio Player).

From: Jerry Stuckle

Date: Tuesday, October 23, 2007

wrote in message:
wrote in message:
wrote in message:
Greetings,
I'm an occasional php/mysql dabbler.
I have a basic data form with a submit button. Unfortunately, it's still
possible for the user to enter data changes and close the window,
without clicking the submit button, thus losing the data.
Can someone point me to a generic example of some code that will trap
and handle this error?
Only way is via JAVAscript.

Something like "onunload submit".
Some sites (Google Groups and the BBC Radio Player are examples), will
pop up a JAVAsript cofirmation dialogue if you try to leave the page
having already typed information in (in thecase of Google Groups), or
have selected a radio programme to listen to (in he case of the BBC
Radio Player).

Which can be very annoying if you've JAVAscript enabled.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@xxxxxxxxxxx
==================

From: Captain Paralytic

Date: Tuesday, October 23, 2007

wrote in message:
wrote in message:
wrote in message:
wrote in message:
> Greetings,
> I'm an occasional php/mysql dabbler.
> I have a basic data form with a submit button. Unfortunately, it's still
> possible for the user to enter data changes and close the window,
> without clicking the submit button, thus losing the data.
> Can someone point me to a generic example of some code that will trap
> and handle this error?
Only way is via JAVAscript.
Something like "onunload submit".
> Some sites (Google Groups and the BBC Radio Player are examples), will
> pop up a JAVAsript cofirmation dialogue if you try to leave the page
> having already typed information in (in thecase of Google Groups), or
> have selected a radio programme to listen to (in he case of the BBC
> Radio Player).
Which can be very annoying if you've JAVAscript enabled.

But so can lots of warning popups on lots of applications. The good
answer is to always let the users have an option

<software> (Or "option", "flag", "switch", "option switch") An
	argument to a command that modifies its function rather than
	providing data.  Options generally start with "-" in {Unix} or
	"/" in {MS-DOS}.  This is usually followed by a single letter
	or occasionally a digit.

	Some commands require each option to be a separate argument,
	introduced by a new "-" or "/", others allow multiple option
	letters to be concatenated into a single argument with a
	single "-" or "/", e.g. "ls -al".  A few Unix commands
	(e.g. {ar}, {tar}) allow the "-" to be omitted.  Some options
	may or must be followed by a value, e.g. "cc prog.c -o prog",
	sometimes with and sometimes without an intervening space.

	{getopt} and {getopts} are commands for parsing command line
	options.  There is also a {C} library routine called getopt
	for the same purpose.

	(1996-12-11)

to switch

1. <programming> {switch statement}.

	2. <software> {command line option}.

	3. <networking> {packet switch}, {circuit switch}.

	(1999-01-14)

them off.

From: Shelly

Date: Tuesday, October 23, 2007

On Mon, 22 Oct 2007 09:45:31 -0700, in comp.lang.php Fester
Bestertester <whatmeworry@xxxxxxxxxxx>
wrote in message:
| Greetings,
|
| I'm an occasional php/mysql dabbler.
|
| I have a basic data form with a submit button. Unfortunately, it's still
| possible for the user to enter data changes and close the window,
| without clicking the submit button, thus losing the data.
I'd be asking why the users are doing this then find a solution.
| Can someone point me to a generic example of some code that will trap
| and handle this error?

A "submit" button on a form has a reason for existence. There have been
MANY times that I have entered data on a form and changed my mind before
"submit"ing. I simply closed the window and all was gone! That is the
EXPECTED behavior. If a user is annoyed that this happened, then he should
learn how to use his computer! If data are to be entered whether or not he
clicks the "submit" button, then by all means get rid of that button!

Simply put, I totally disagree with the use of the word "Unfortunately".
Rather, I would've said "dammit" (or worse!) if the data had actually been
entered when I closed the window without clicking "submit".

Shelly

From: Jeff North

Date: Wednesday, October 24, 2007

On Tue, 23 Oct 2007 10:28:59 -0400, in comp.lang.php "Shelly"
<sheldonlg.news@xxxxxxxxxxx>
wrote in message:

|
| > On Mon, 22 Oct 2007 09:45:31 -0700, in comp.lang.php Fester
| > Bestertester <whatmeworry@xxxxxxxxxxx>
wrote in message:
| >
| | Greetings,
| |
| | I'm an occasional php/mysql dabbler.
| |
| | I have a basic data form with a submit button. Unfortunately, it's still
| | possible for the user to enter data changes and close the window,
| | without clicking the submit button, thus losing the data.
| >
| > I'd be asking why the users are doing this then find a solution.
| >
| | Can someone point me to a generic example of some code that will trap
| | and handle this error?
|
| A "submit" button on a form has a reason for existence. There have been
| MANY times that I have entered data on a form and changed my mind before
| "submit"ing. I simply closed the window and all was gone! That is the
| EXPECTED behavior.

I agree. We have all done that at one time or other.

| If a user is annoyed that this happened, then he should
| learn how to use his computer!

Not necessarily so. The next button could be too close to the close
button and people are accidentally clicking the close button. Making
the next button slightly bigger (an easier target)'d solve the
problem.

| If data are to be entered whether or not he
| clicks the "submit" button, then by all means get rid of that button!
|
| Simply put, I totally disagree with the use of the word "Unfortunately".
| Rather, I would've said "dammit" (or worse!) if the data had actually been
| entered when I closed the window without clicking "submit".
|
| Shelly
|

-- -------------------------------------------------------------
jnorthau@xxxxxxxxxxx : Remove your pants to reply
-- -------------------------------------------------------------

From: Fester Bestertester

Date: Friday, October 26, 2007

wrote in message:

A "submit" button on a form has a reason for existence. There have been
MANY times that I have entered data on a form and changed my mind before
"submit"ing. I simply closed the window and all was gone! That is the
EXPECTED behavior. If a user is annoyed that this happened, then he should
learn how to use his computer! If data are to be entered whether or not he
clicks the "submit" button, then by all means get rid of that button!
Simply put, I totally disagree with the use of the word "Unfortunately".
Rather, I would've said "dammit" (or worse!) if the data had actually been
entered when I closed the window without clicking "submit".

Actually this answer kind of reflects my initial reaction on hearing the
issue come up in the first place. My inclination was to ask, "so, if you
go to your bank's web site and enter all the information for a transfer
of funds from one account to another and then just click the "x" window,
do you assume the transaction went through?"

I sort

1. <application, algorithm> To arrange a collection of items
	in some specified order.  The items - {records} in a file or
	data structures in memory - consist of one or more {fields} or
	members.  One of these fields is designated as the "sort key"
	which means the records will be ordered according to the value
	of that field.  Sometimes a sequence of key fields is
	specified such that if all earlier keys are equal then the
	later keys will be compared.  Within each field some ordering
	is imposed, e.g. ascending or descending numerical, {lexical
	ordering}, or date.

	Sorting is the subject of a great deal of study since it is a
	common operation which can consume a lot of computer time.
	There are many well-known sorting {algorithms} with different
	time and space behaviour and programming {complexity}.

	Examples are {quicksort}, {insertion sort}, {bubble sort},
	{heap sort}, and {tree sort}.  These employ many different
	data structures to store sorted data, such as {arrays},
	{linked lists}, and {binary trees}.

	2. <tool> The {Unix} utility program for sorting lines of
	files.

	{Unix manual page}: sort(1).

	(1997-02-12)

of can not blame the users though. The functional

1. Working correctly.

	2. Pertaining to {functional programming}.

	3. {higher-order function}.

people designed
this particular software

<programming> (Or "computer program", "program", "code") The
	instructions executed by a computer, as opposed to the
	physical device on which they run (the "{hardware}").

	The term was coined by the eminent statistician, {John Tukey}.

	Programs stored on {non-volatile storage} built from
	{integrated circuits} (e.g. {ROM} or {PROM}) are usually
	called {firmware}.

	Software can be split into two main types - {system software}
	and application software or {application programs}.  System
	software is any software required to support the production or
	execution of application programs but which is not specific to
	any particular application.  Examples of system software would
	include the {operating system}, {compilers}, editors and
	sorting programs.

	Examples of application programs would include an accounts
	package or a {CAD} program.  Other broad classes of
	application software include {real-time} software, {business
	software}, scientific and engineering software, {embedded
	software}, personal computer software and {artificial
	intelligence} software.

	Software includes both {source code} written by humans and
	executable {machine code} produced by {assemblers} or
	{compilers}.  It does not usually include the data processed
	by programs unless this is in a format such as {multimedia}
	which depends on the use of computers for its presentation.
	This distinction becomes unclear in cases such as {spread
	sheets} which can contain both instructions (formulae and
	{macros}) and data.  There are also various intermediate
	compiled or {semi-compiled}, forms of software such as
	{library} files and {byte-code}.

	Some claim that {documentation} (both paper and electronic) is
	also software.  Others go further and define software to be
	programs plus documentation though this does not correspond
	with common usage.

	The noun "program" describes a single, complete and
	more-or-less self-contained list of instructions, often stored
	in a single {file}, whereas "code" and "software" are
	uncountable nouns describing some number of instructions which
	may constitute one or more programs or part thereof.  Most
	programs, however, rely heavily on various kinds of {operating
	system} software for their execution.  The nounds "code" and
	"software" both refer to the same thing but "code" tends to
	suggest an interest in the implementation details whereas
	"software" is more of a user's term.

	(2002-07-21)

usage survey form in such a way that it has
dozens of fields, for dozens of possible types of software. The result
is that the user scrolls down, enters some numbers

(Scientific computation) Output from a computation that may
	not be significant but at least indicates that the program is
	running.  Numbers may be used to placate management, grant
	sponsors, etc.  "Making numbers" means running a program
	because output - any output, not necessarily meaningful output
	- is needed as a demonstration of progress.

	See {pretty pictures}, {math-out}, {social science number}.

	[{Jargon File}]

	(1995-01-13)

at the bottom

<theory> The least defined element in a given {domain}.

	Often used to represent a non-terminating computation.

	(In {LaTeX}, bottom is written as {\perp}, sometimes with the
	domain as a subscript).

	(1997-01-07)

of the
form, and then forgets that there's a "Submit" button back at the top.

I have remedied this by creating several new instances of the Submit
button throughout the form, so that at least one instance is always
visible, and by placing a text

1. Executable code, especially a "pure code" portion shared
	between multiple instances of a program running in a
	{multitasking} {operating system}.

	Compare {English}.

	2. Textual material in the mainstream sense; data in ordinary
	{ASCII} or {EBCDIC} representation (see {flat ASCII}).  "Those
	are text files; you can review them using the editor."

	These two contradictory senses confuse hackers too.

	[{Jargon File}]

	(1995-03-16)

reminder at the top of the form.
Hopefully that will do the trick.

From: Norman Peelman

Date: Saturday, October 27, 2007

wrote in message:
wrote in message:
A "submit" button on a form has a reason for existence. There have
been MANY times that I have entered data on a form and changed my mind
before "submit"ing. I simply closed the window and all was gone!
That is the EXPECTED behavior. If a user is annoyed that this
happened, then he should learn how to use his computer! If data are
to be entered whether or not he clicks the "submit" button, then by
all means get rid of that button!

Simply put, I totally disagree with the use of the word
"Unfortunately". Rather, I would've said "dammit" (or worse!) if the
data had actually been entered when I closed the window without
clicking "submit".
Actually this answer kind of reflects my initial reaction on hearing the
issue come up in the first place. My inclination was to ask, "so, if you
go to your bank's web site and enter all the information for a transfer
of funds from one account to another and then just click the "x" window,
do you assume the transaction went through?"
I sort of can not blame the users though. The functional people designed
this particular software usage survey form in such a way that it has
dozens of fields, for dozens of possible types of software. The result
is that the user scrolls down, enters some numbers at the bottom of the
form, and then forgets that there's a "Submit" button back at the top.
I have remedied this by creating several new instances of the Submit
button throughout the form, so that at least one instance is always
visible, and by placing a text reminder at the top of the form.
Hopefully that will do the trick. I'd put a button at the top and bottom with reminders

throughout... too many buttons and someone will think they can update
info periodically (which is still not what you want).

My opinion is this, a form is presented with anticipation of all
fields being filled in (minus non-required fields). You must write

1. <chat> {Unix}'s simple {talk} command and {protocol}.
	write has been largely superseded by {talk} and then {irc}.

	An enhancement, {RWP}, has been proposed.

	2. <tool> A simple {text editor} for {Windows}.

	(1998-04-28)

your
script to handle the form properly to begin with. Do not update anything
until the form is submitted and you've checked all appropriate fields
have been entered (or changed). If not give them the form back with
hints on the appropriate entries (I use CSS). If a user closes their
window without subbmitting the form then assume that they didn't want
to submit the form. If you want to use cookies so a user can come back
later that's fine... just do not do any updates until the form is
submitted and verified first.

You might look at breaking the form up into smaller pieces and
feeding it to the users based on each previous part (use cookies or
sessions to track). Have your script dynamically produce the form parts
as it reacts to previous selections... no JAVAscript needed. AT the end
when all info has been gathered and verified do your stuff.

Norm

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