PHP/stristr

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A PHP function to compare strings case-insensitive. Also see strstr.

stristr --  Case-insensitive strstr()

[edit] Description

string stristr ( string haystack, string needle )

Returns all of haystack from the first occurrence of needle to the end. needle and haystack are examined in a case-insensitive manner.

If needle is not found, returns FALSE.

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

• http://www.php.net/manual/en/function.stristr.php

<?php
$email = 'USER@EXAMPLE.com';
echo stristr($email, 'e');
// outputs ER@EXAMPLE.com
?>

Example 2. Testing if a string is found or not

<?php
$string = 'Hello World!';
if(stristr($string, 'earth') === FALSE) {
        echo '"earth" not found in string';
}
// outputs: "earth" not found in string
?>

Example 3. Using a non "string" needle

<?php
$string = 'APPLE';
echo stristr($string, 97); // 97 = lowercase a
// outputs: APPLE
?>