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String Funkcje
PHP Manual

# strstr

(PHP 4, PHP 5)

strstr — Find first occurrence of a string

### Opis

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

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

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

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

### Parametry

`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.

`before_needle`

  If `TRUE` (the default is `FALSE`), strstr() returns the part of the `haystack` before the first occurence of the `needle` .

### Zwracane wartości

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

### Rejestr zmian

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

### Przykłady

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
?>`

### Patrz także

- preg_match()
- stristr()
- strpos()
- strrchr()
- substr()

strspn
strtok
String Funkcje
PHP Manual