PHP Strrpos () and Strripos () function _php techniques

Strripos () function

Definitions and usage
The Strripos () function finds the last occurrence of a string in another string.
If successful, the position is returned, or false.

Grammar
Strrpos (String,find,start)

Parameters	Description
String	Necessary. Specify the string to be searched for.
Find	Necessary. Specify the characters to find.
Start	Optional. Specify where to start the search.

Tips and comments
Note: This function is not sensitive to case.

Example:

Copy Code code as follows:

<?php
Echo Strripos ("Hello world!", "WO");
?>

Output: 6

Strrpos () function

Definitions and usage
The Strrpos () function finds the last occurrence of a string in another string.

If successful, the position is returned, or false.

Grammar
Strrpos (String,find,start)

Parameters	Description
String	Necessary. Specify the string to be searched for.
Find	Necessary. Specify the characters to find.
Start	Optional. Specify where to start the search.

Tips and comments
Note: This function is sensitive to case sensitivity. Use Strripos () if you want to find case insensitive.

Example

Copy Code code as follows:

<?php
Echo Strrpos ("Hello world!", "Wo");
?>

Output:
6

Use Strrpos to verify that links are links to HTTP protocols

Copy Code code as follows:

<?php
$url = "http://www.baidu.com";
if (Strrpos ($url, ' http://')!== 0)
echo "link to link for HTTP protocol";
?>