$submit value is empty

[rubing]

I see the following commonly used for detecting whether a form was submited.

 

if(isset($submit)) { ...}

 

yet when i try to incorporate it into my scripts it doesn't work  :-\

[btherl]

For that to work you will need to have register_globals on, and you will need to have your submit button named "submit", all lowercase.  And the form must have been submitted by clicking that submit button, not via a javascript submit() call.

[DarkWater]

btherl, you just made register_globals sounds like a beneficial thing.  Let me clarify.  You would need register_globals on for that to work as-is, but seeing as register_globals is an epic failure, don't use them and just do $_POST['submit'].

[redarrow]

do it this way or the high way register_globals on is bad programming now and turned off on php6

<?php
if(isset($_POST['submit'])){

what_ever

}
?>

[DarkWater]

@redarrow: They aren't turned in in PHP6, they're turned off in PHP since 4.2...  They're COMPLETELY REMOVED in php6.

[PFMaBiSmAd]

...And php4.2 was in April 2002, a long time ago in programming years.

[rubing]

that makes sense...i was reading this in an older php book.

[redarrow]

sorry there removed so sorry ........

 

here a recent php6 update ok mate....

 

http://davidwalsh.name/upcoming-php6-additions-changes

[btherl]

Given how long it's taken for web hosts to switch to php 5, I don't think there's any danger of register_globals going missing anytime soon

 

And no I am not endorsing register_globals by that statement.  $_POST['submit'] is better (or $_GET['submit'] if you're using a get form, but you should be using a post form if possible)