strstr

Returns part of haystack string starting from and including the first occurrence of needle to the end of haystack.

Note:

This function is case-sensitive. For case-insensitive searches, use stristr().

Note:

If you only want to determine if a particular needle occurs within haystack, use the faster and less memory intensive function strpos() instead.

The input string.

If needle is not a string, it is converted to an integer and applied as the ordinal value of a character.

If TRUE, strstr() returns the part of the haystack before the first occurrence of the needle (excluding the needle).

Returns the portion of string, or FALSE if needle is not found.

Added the optional parameter before_needle.

strstr()

<?php
$email  = 'name@example.com';
$domain = strstr($email, '@');
echo $domain; // prints @example.com

$user = strstr($email, '@', true); // As of PHP 5.3.0
echo $user; // prints name
?>

stristr() -

strrchr() -

strpos() -

strpbrk() -

preg_match() -