Regex
Create Post Slugs (120)
Date Published: November 07, 2009
 <?php 
function create_slug($string){  
    $slug=preg_replace('/[^A-Za-z0-9-]+/', '-', $string);  
    return $slug;  
}
?>
         
Regex check if zipcode is in range and return Yes or No (123)
Date Published: October 20, 2009
 <?php

$zipcode='09607';
echo 'Zipcode in range?';
if(preg_match('/^096[0-9]{2}$/'
, $zipcode))


    echo "Yes";

else

    echo "No";

?>