stristr

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.

例子 1. stristr() example <?php   $email = 'USER@EXAMPLE.com';   echo stristr($email, 'e'); // outputs ER@EXAMPLE.com ?>

例子 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 ?>

例子 3. Using a non "string" needle <?php   $string = 'APPLE';   echo stristr($string, 97); // 97 = lowercase a // outputs: APPLE ?>

See also strstr(), strrchr(), substr(), and ereg().