PHP function strstr() that searches for the first occurrence of a string in another string-PHP Tutorial-php.cn

Example

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

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

Copy after login

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)

Copy after login

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);
?>

Copy after login

输出：

o world!

Copy after login

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);
?>

Copy after login

例子

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

Copy after login

输出：

world!

Copy after login

The above is the detailed content of PHP function strstr() that searches for the first occurrence of a string in another string. For more information, please follow other related articles on the PHP Chinese website!

Related labels：

php string

source：php.cn

Previous article：php function strspn() that returns a string containing the number of characters specified in the charlist parameter Next article：PHP function strtok() that splits a string into smaller strings (tags)

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

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