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Homephp教程php手册strrpos()和strripos()函数【PHP】

strripos() 函数 定义和用法 strripos() 函数查找字符串在另一个字符串中最后一次出现的位置。 如果成功,则返回位置,否则返回 false。 语法 strrpos(string,find,start) 参数 描述 string 必需。规定被搜索的字符串。 find 必需。规定要查找的字符。 start

strripos() 函数

定义和用法

 

strripos() 函数查找字符串在另一个字符串中最后一次出现的位置。

如果成功,则返回位置,否则返回 false。

 

语法

 

strrpos(string,find,start)


 

参数 描述
string 必需。规定被搜索的字符串。
find 必需。规定要查找的字符。
start 可选。规定开始搜索的位置。

 

提示和注释

 

注释:该函数对大小写不敏感。

 

例子:

 

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


 

输出:6

 

 strrpos() 函数

定义和用法

 

strrpos() 函数查找字符串在另一个字符串中最后一次出现的位置。

如果成功,则返回位置,否则返回 false。

 

语法

 

strrpos(string,find,start)

 

参数 描述
string 必需。规定被搜索的字符串。
find 必需。规定要查找的字符。
start 可选。规定开始搜索的位置。

 

提示和注释

 

注释:该函数对大小写敏感。如需进行大小写不敏感的查找,请使用 strripos()。

 

例子

 

 

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


输出:

6

 

用strrpos验证链接是否为http协议的链接

<?php $url="http://www.baidu.com";
if (strrpos($url, 'http://') !== 0)
echo "链接为http协议的链接";
?>


 

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