Find the first occurrence of a string

# strstr

(PHP 4, PHP 5, PHP 7)

strstr — Find the first occurrence of a string

### Descrierea

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

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

> Notă:

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

> Notă:

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

### Parametri

`haystack`

  The input string.

`needle`

  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.

`before_needle`

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

### Valorile întoarse

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

### Istoricul schimbărilor

Versiune | Descriere
--- | ---
5.3.0 | Added the optional parameter `before_needle`.
4.3.0 | strstr() was made binary safe.

### Exemple

Example #1 strstr() example

`<?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
?>`

### A se vedea și

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