AJAX

Problems with form submition

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Join Date: Nov 2007

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nav33n

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Re: Problems with form submition

#11

Apr 4th, 2008

•

eg. document.formname.submitButtonName.submit();

I dont think you can. But you can do this. Instead of having a submit button for delete button, have a normal button as DangerDev has mentioned. Then onclick call a javascript function and submit the page. Eg.

 Help with Code Tags 
 php Syntax (Toggle Plain Text) 
<?php
	print_r($_POST);
?>
<html>
<head>
<script type="text/javascript">
function delsubmit() {
	var conf;
	conf=confirm("Are you sure ?");
	if(conf) {
		document.test.submit();
	} else {
		return false;
	}
}
</script>
</head>
<body>
<form name="test" method="post" action="<?php echo $PHP_SELF; ?>">
<input type="text" name="name" value="1">
<input type="button" name="button" value="Delete" onclick="javascript: return delsubmit();">
</form>
</body>
</html>
<?php
	print_r($_POST);
?>
<html>
<head>
<script type="text/javascript">
function delsubmit() {
	var conf;
	conf=confirm("Are you sure ?");
	if(conf) {
		document.test.submit();
	} else {
		return false;
	}
}
</script>
</head>
<body>
<form name="test" method="post" action="<?php echo $PHP_SELF; ?>">
<input type="text" name="name" value="1">
<input type="button" name="button" value="Delete" onclick="javascript<b></b>: return delsubmit();">
</form>
</body>
</html>

This is just a simple example. The next snippet of code will not work, because there is already a submit button. Eg.

 Help with Code Tags 
 php Syntax (Toggle Plain Text) 
<?php
	print_r($_POST);
?>
<html>
<head>
<script type="text/javascript">
function delsubmit() {
	var conf;
	conf=confirm("Are you sure ?");
	if(conf) {
		document.test.submit();
	} else {
		return false;
	}
}
</script>
</head>
<body>
<form name="test" method="post" action="<?php echo $PHP_SELF; ?>">
<input type="text" name="name" value="1">
<input type="submit" name="submit" value="add">
<input type="button" name="button" value="Delete" onclick="javascript: return delsubmit();">
</form>
</body>
</html>
<?php
	print_r($_POST);
?>
<html>
<head>
<script type="text/javascript">
function delsubmit() {
	var conf;
	conf=confirm("Are you sure ?");
	if(conf) {
		document.test.submit();
	} else {
		return false;
	}
}
</script>
</head>
<body>
<form name="test" method="post" action="<?php echo $PHP_SELF; ?>">
<input type="text" name="name" value="1">
<input type="submit" name="submit" value="add">
<input type="button" name="button" value="Delete" onclick="javascript<b></b>: return delsubmit();">
</form>
</body>
</html>

To make both of them work, you should have 2 buttons. Eg.

 Help with Code Tags 
 php Syntax (Toggle Plain Text) 
<?php
	print_r($_POST);
?>
<html>
<head>
<script type="text/javascript">
function delsubmit() {
	var conf;
	conf=confirm("Are you sure ?");
	if(conf) {
		document.test.submit();
	} else {
		return false;
	}
}
</script>
</head>
<body>
<form name="test" method="post" action="<?php echo $PHP_SELF; ?>">
<input type="text" name="name" value="1">
<input type="button" name="button" value="add" onclick="javascript: document.test.submit();">
<input type="button" name="button" value="Delete" onclick="javascript: return delsubmit();">
</form>
</body>
</html>
<?php
	print_r($_POST);
?>
<html>
<head>
<script type="text/javascript">
function delsubmit() {
	var conf;
	conf=confirm("Are you sure ?");
	if(conf) {
		document.test.submit();
	} else {
		return false;
	}
}
</script>
</head>
<body>
<form name="test" method="post" action="<?php echo $PHP_SELF; ?>">
<input type="text" name="name" value="1">
<input type="button" name="button" value="add" onclick="javascript<b></b>: document.test.submit();">
<input type="button" name="button" value="Delete" onclick="javascript<b></b>: return delsubmit();">
</form>
</body>
</html>

If you still have problems, let me know!
Cheers,
Naveen

Ignorance is definitely not bliss!

*PM asking for help will be ignored*

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Join Date: Oct 2007

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Venom Rush Venom Rush is offline

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Posting Whiz in Training

Re: Problems with form submition

#12

Apr 4th, 2008

Thanks for that nav33n. Slowly getting somewhere, the form is submitting but it's not actually executing the php code. Is my php code below correct?:

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
if (isset($_POST['FormName'])) {
if (isset($_POST['FormName'])) {

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nav33n

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Senior Poster

Re: Problems with form submition

#13

Apr 4th, 2008

Nope.. $_POST['formname'] will not hold any value. You can do it this way (again, as DangerDev mentioned), have a hidden variable (task). When you click on 1st button, assign a value to task variable. document.formname.task.value='add'; Similarly, assign another value when another button is clicked.
document.formname.task.value='delete'; Then you can check what value task variable holds.

 Help with Code Tags 
 php Syntax (Toggle Plain Text) 
if($_POST['task']=="add"){
//add
} 
if($_POST['task']=="delete"){
//delete
}
if($_POST['task']=="add"){
//add
} 
if($_POST['task']=="delete"){
//delete
}

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Join Date: Oct 2007

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Re: Problems with form submition

#14

Apr 4th, 2008

Still having problems executing the php code. this is what I have so far:

Javascript for setting the task value to del and then submitting the form

 Help with Code Tags 
 javascript Syntax (Toggle Plain Text) 
function confDelete() {
	var answer = confirm("Are you sure")
	if (answer){
		document.formName.task.value=='del';
		document.formName.submit();
	} else {
		return false;
	}
}
function confDelete() {
	var answer = confirm("Are you sure")
	if (answer){
		document.formName.task.value=='del';
		document.formName.submit();
	} else {
		return false;
	}
}

The hidden "task" field and the delete button

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
<input type="hidden" name="task" id="task" value="">
 
<input onclick="javascript: return confDelete();" type="button" name="delete" value="Delete">
<input type="hidden" name="task" id="task" value="">

<input onclick="javascript<b></b>: return confDelete();" type="button" name="delete" value="Delete">

If task has the value of del then execute PHP code

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
if ($_POST['task']=="del"){
// execute code
}
if ($_POST['task']=="del"){
// execute code
}

My second button is set up in a similar way. Right now neither of them execute the required PHP code.

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nav33n

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Re: Problems with form submition

#15

Apr 4th, 2008

•

document.formName.task.value=='del';

Should be
document.formName.task.value='del';

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Suomedia

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Re: Problems with form submition

#16

Apr 4th, 2008

You would do far better not to rely on javascript for this at all. Instead you should parse the post with PHP and from that display a confirmation for the delete if delete was selected. That is simply good coding practice.

It is common to use javascript for error checking (I do myself) however the form should still submit and also be checked with PHP if javascript is disabled.

Matti Ressler
Suomedia

Last edited by Suomedia; Apr 4th, 2008 at 10:23 pm.

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~s.o.s~

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Re: Problems with form submition

#17

Apr 6th, 2008

Relying on Javascript to deliver the business functionality is dangerous to the business which you are trying to cater. If this is some school project, it doesn't matter anyways but if this is for real, you need to start rethinking your design and add a server side check for such critical functionality.

Last edited by ~s.o.s~; Apr 6th, 2008 at 2:25 pm.

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Re: Problems with form submition

#18

Apr 7th, 2008

Thanks nav33n. Got it working.

Suomedia, ~s.o.s~...Thanks for your comments. I realize javascript could be switched off on some machines and would never use this kind of functionality if it was being used by the public. It's a simple admin system that's only going to be used by one person.

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