[Resolved] Function to check for certain characters

[Avochelm]

What function should I use to check to see if characters OTHER than underscores or alphanumeric exist?

[bubblenut]

if(preg_match('/[^_0-9a-z]/i',$string) {
  echo("bad string");
} else {
  echo("OK (it is just alphanum and _)");
}

HTH
Bubble

[Avochelm]

I've been crawling all over this page: http://www.php.net/manual/en/ref.strings.php with out luck, so thank you very much. ;D

[Avochelm]

There was a small error:

if (preg_match('/[^{0-9a-z]/i',$string))} {
echo("bad string");
} else {
echo("OK (it is just alphanum and )");
}