Validate string without special characters

Question

i have a problem.

i what to get info about my string have ordre chater in ( a-z A-Z 0-9 and - _ ) if my string have ordre its return false or not return true.

i hob i can get help to this problem.

Answer 1

If I'm reading your question correctly, you want to validate if a string only contains a-z A-Z 0-9 and -_. Right?

/^[a-zA-Z0-9\-_]*$/

...should work.

Answer 2

Not sure I understand your english. You want to know if it contains characters other than a-z, A-Z, 0-9, - and _?

If so, ereg($string, '[^a-zA-Z0-9_-]')

Answer 3

i foundt my own way, but tanks to JasonWoof you make me on right way.

if (preg_match("/[^a-zA-Z0-9\_-]/i", $this->page_shorttag))
{
}