PHP function strstr() that searches for the first occurrence of a string in another string

Example

Find the first occurrence of "world" in "Hello world!" and return the remainder of the string:

<?php
echo strstr("Hello world!","world");
?>

Definition and Usage

strstr() Function Search for the first occurrence of a string in another string.

Note: This function is binary safe.

Note: This function is case-sensitive. To perform a case-insensitive search, use the stristr() function.

Syntax

strstr(string,search,before_search)

Parameters	Description
string	Required. Specifies the string to be searched for.
search	Required. Specifies the string to search for. If the argument is a number, searches for characters that match the ASCII value for that number.
before_search	Optional. A Boolean value with a default value of "false". If set to "true", it will return the portion of the string preceding the first occurrence of the search parameter.

Technical details

In PHP 5.3, the before_search parameter was added.

更多实例

实例 1

通过 "o" 的 ASCII 值搜索字符串，并返回字符串的剩余部分：

<?php
echo strstr("Hello world!",111);
?>

输出：

o world!

实例 2

返回 "world" 第一次出现之前的字符串部分：

<?php
echo strstr("Hello world!","world",true);
?>

例子 

<?php
echo strstr("Hello world!","world");
?>

输出：

world!

Return value:	Returns the remainder of the string (from the match point). Returns FALSE if the searched string is not found.
PHP Version:	4+
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