HTML FORMS and PHP

[Tricky]

I have a webpage mypage.htm that has a form which has it's action as "mypage.htm" I.e. Reloads itself with some posted values

I have some embedded PHP which check the fields are valid (email address, not blank etc) and if they are not shows an error against the invalid entries

An internal field "$allvalid" is 0 when all is ok and > 0 when errors are present

I want to redirect "mypage.htm" to some other page I.e. "success.htm" if $valid=0, I've tried the "Header: Location ..." but this won't work because I am already outputting data to screen

Any ideas?

[Strzelecki]

Best way is to use Javascript afterward, but you can work around in PHP like this:

PHP Code:

<?php
ob_start();

// script with screen output

ob_end();
?>

[BBKing]

Any ideas?

Just done something similar - redirected to the same page with different parameters if a particular parameter was set. I use JSPs though, but the principle should be fairly similar - they don't allow you to redirect after you've done any output at all, so you must make your decision first, before outputting anything. This means using a separate pure PHP page as the target. Then, if you find all's well, redirect to success.htm, otherwise redirect to mypage.htm.

You could rewrite mypage.htm as php, but I don't totally approve of mixing content and programmatical data in the same file. Easier to debug if you keep it separate.

[Tricky]

Sorted it, just do all the error checking and redirection before starting any output! (doh!)
I am too old for this stuff

[BBKing]

That's the key - remember that once you start printing to browser, you can't stop. Like Pringles.

OK, that's the Guinness talking...