Problem with getting reg exp to work

[NeilB]

I'm trying to get this regular expression to work, so it validates input in the correct manner such as 35p or 99p. But at the moment it's just throwing the error message at me even though it's the correct input for that field.

[code=php:0]if(!ereg("^\d\d?p$", $_POST['peak'])) $error_msg[].=[/code]

[Nicklas]

[code]if (!preg_match('/^\d{1,2}p$/', $_POST['peak'])) // do something[/code]

Or an alternative way
[code]list($nr, $p) = sscanf($_POST['peak'], "%d%s");
if ($nr < 0 || $nr > 100 || $p != 'p') // Do something[/code]

[obsidian]

[quote author=NeilB link=topic=113574.msg461578#msg461578 date=1162460923]
[code=php:0]if(!ereg("^\d\d?p$", $_POST['peak'])) $error_msg[].=[/code]
[/quote]

Try this slight adjustment:
[code]
<?php
if (!ereg('^[0-9]{1,2}p$', $_POST['peak'])) // show error
?>
[/code]