Preg_match() issue

[Fuzzylr]

Ok, I've been playing with this for hours. I can't seem to make it work. I've tried several things.

Here is the basic idea. I want to make sure the name contains letters (a-zA-Z) and numbers 0-9. I don't want them to be able to use any special characters characters at all.

$accept = '[a-zA-Z0-9]';

if(!preg_match($accept, $value)
{
echo 'Alpha number characters required.';

$error=true;
}
else $error = false;

it was working. but now for some reason it's busted.

[laserlight]

Have you considered using [man]ctype_alnum/man instead?

The problem is that you probably used ereg(), but now switch to preg_match() but failed to put in pattern delimiters. Furthermore, you are just matching one character, whereas you actually want to match all characters from start to end.