Submit type=image not validating

amrigo

I have a self submiting form with a submit button type image, named submit.

if ($_POST['submit'])
{
//...
//...
}

But i am always returning a NULL value for $_POST[submit]
i am using the same script with a input type="submit' and it works, how can i make it work for a input type=image ??

Thank´s in advance

laserlight

if (isset($_POST['submit']))
{
	//etc
}

amrigo

thank´s

amrigo

It´s strange but it do not work it always return false ...,

laserlight

Too bad, you're just unlucky :p

You could be luckier if you provide more information on what you tried, and attempted to find the simplest and smallest example of a PHP script that has this problem.

amrigo

I have exactly this code to the button:

i thougth i would have a post variable coming from : name="submit"

to make isset('submit') but i track the value and whenever i click this button i always got bolean(false) value or NULL . Maybe the is another way to track if the submit button was clicked

Believe me! my form has the method set to post!

The same script using a html normal input type=submit works
but i need a button type=image to the submit button

i only want to control this form checking for blank fields
:

<?php
/var_dump(isset($_POST[submit]));/

if (isset($POST['submit']))
{
print "form sent";
$cmp_ob = explode(",", $POST['required']);
$erro = 0;
foreach($cmp_ob as $fieldname) {
if ($_POST[$fieldname] == "") {
print "<br> - $fieldname";
$error++;
}
}
if ($error == 0) {
print "go to other page";
} else {
$errormessage = "<b>Fields above required.";
}
}

cheers

mtimdog

If all else fails, just put a hidden element named submit with a value of submit inside your form😃

laserlight

Wait. Did you read my earlier reply carefully?

Basically, I hypothesized that you were missing the value attribute in the input.

So dont use:
<input type="image" name="submit" src="../img/bt.gif" border="0" alt="Click here" align="rigth">

but use:

amrigo

hi
I test including value="submit" on my tag
but keep returning false
I try with an input type hidden too
but keep returning false

laserlight

No, they dont return false, they return a null value.
isset() returns true even if the tested variable has a false value.

The part about the hidden input field not working is strange though.
Unless there is something wrong with your HTML code, then that implies that even if you dont use an image button, none of your fields should work.

Yet they do.

Could you provide the relevant code snippet, placed within [php] and [/php] bbcode tags?

Preferably include as much as you reasonably can.

mrhappiness

if you use type="image" as submit button you will get the x and y coordinates of the pic specifiyng the exact position the user clicked at

so try checking $POST['submit_x'] or do print_r($POST); and see what information your script has got

amrigo

I get submit_x and submit_y values
i will try to rely on these values ...

Thank´s

amrigo

i try to track if($_POST[submit_x] >0 ) but it do not work using a normal input type="submit " it works but i need image button because using input type="submit " makes a javascript function stop to work