(PHP 4, PHP 5, PHP 7)

stristrCase-insensitive strstr()


stristr ( string $haystack , mixed $needle [, bool $before_needle = FALSE ] ) : string

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



The string to search in


If needle is not a string, it is converted to an integer and applied as the ordinal value of a character. This behavior is deprecated as of PHP 7.3.0, and relying on it is highly discouraged. Depending on the intended behavior, the needle should either be explicitly cast to string, or an explicit call to chr() should be performed.


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

needle and haystack are examined in a case-insensitive manner.

Valorile întoarse

Returns the matched substring. If needle is not found, returns FALSE.

Istoricul schimbărilor

Versiune Descriere
5.3.0 Added the optional parameter before_needle.


Example #1 stristr() example

'[email protected]';
stristr($email'e'); // outputs [email protected]
echo stristr($email'e'true); // As of PHP 5.3.0, outputs US

Example #2 Testing if a string is found or not

'Hello World!';
stristr($string'earth') === FALSE) {
'"earth" not found in string';
// outputs: "earth" not found in string

Example #3 Using a non "string" needle

stristr($string97); // 97 = lowercase a
// outputs: APPLE


Notă: Această funcție acceptă și date binare.

A se vedea și

  • strstr() - Find the first occurrence of a string
  • strrchr() - Find the last occurrence of a character in a string
  • stripos() - Find the position of the first occurrence of a case-insensitive substring in a string
  • strpbrk() - Search a string for any of a set of characters
  • preg_match() - Perform a regular expression match