PHP Manual . ... Next . PHP 3 <= 3.0.18, PHP 4 >= 4.0.0) strstr -- Find first occurrence of a string . string strstr ( string haystack, string needle) . Returns all of haystack from the first occurrence of needle to the end. ... If needle is not a string, it is converted to an integer and applied as the ordinal value of a character. ... Example 1. strstr() example . email = 'sterling@designmultimedia.com'; $domain = strstr($email, '@'); print $domain; // prints @designmultimedia.com . ...