preg_match()

[dreamwest]

Why dosent this work, im trying to match upper case, lower case and numbers only

 

$id = '3xDJ7@#';

if (!preg_match('/^[a-zA-Z0-9]/', $id)){
echo "ERROR!";
}else{
echo 'ok';
}

 

This always echos "ok"

 

[sasa]

you just check first character of string

if you want to check it all change patern to '/^[a-zA-Z0-9]+$/'

[dreamwest]

Supa sweet!

[salathe]

dreamwest, and anyone else stumbling on this thread, please see http://php.net/regexp.reference.anchors for details on using "anchors" with your regular expressions.

 

Outside a character class ... the circumflex character (^) is an assertion which is true only if the current matching point is at the start of the subject string.

 

A dollar character ($) is an assertion which is TRUE only if the current matching point is at the end of the subject string, or immediately before a newline character that is the last character in the string (by default).