How to colour fields if there is error? Simple question

[toplisek]

Hello,
I have problem how to do correct code with PHP:
1.colour text and input box if there is an error in form.

Need help.

I have the following code but it is wrong:
[PHP]
<?PHP (isset($error))? 'class=headingERROR' : 'class=headingCORRECT' ;?>
<input name="firstname" class="box" maxlength="30" size="20">
[/PHP]

Regards:)

[phparion]

<input name="firstname"
<?php echo (isset($error))? 'class=headingERROR' :
'class=headingCORRECT';?> maxlength="30" size="20">

[kaleb]

toplisek,

Because you already have a css class assigned to the input box, I would handle it like this...

<?PHP
if ( isset($error) )
{
 $css_class = ' headingERROR';
}
else
{
 $css_class = ' headingCORRECT';
}
?>
<input name="firstname" class="box<?=$css_class?>" maxlength="30" size="20">