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# stristr

(PHP 3 >= 3.0.6, PHP 4, PHP 5)

stristr -- Case-insensitive strstr()

## Description

string stristr ( string haystack, string needle )

Returns all of haystack from the first occurrence of needle to the end. needle and haystack are examined in a case-insensitive manner.

If needle is not found, returns `FALSE`.

If needle is not a string, it is converted to an integer and applied as the ordinal value of a character.

例子 1. stristr() example

`<?php $email = 'USER@EXAMPLE.com'; echo stristr($email, 'e'); // outputs ER@EXAMPLE.com ?>`

例子 2. Testing if a string is found or not

`<?php $string = 'Hello World!'; if(stristr($string, 'earth') === FALSE) { echo '"earth" not found in string'; } // outputs: "earth" not found in string ?>`

例子 3. Using a non "string" needle

`<?php $string = 'APPLE'; echo stristr($string, 97); // 97 = lowercase a // outputs: APPLE ?>`

> 注: 本函数可安全用于二进制对象。

See also strstr(), strrchr(), substr(), and ereg().

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stripslashes | 上一级 | strlen