php strpos函数有什么用?
定义和用法
strpos() f函数查找字符串在另一字符串中第一次出现的位置(区分大小写)。
注释:strpos() 函数是区分大小写的。
注释:该函数是二进制安全的。
相关函数:
strrpos() - 查找字符串在另一字符串中最后一次出现的位置(区分大小写)
stripos() - 查找字符串在另一字符串中第一次出现的位置(不区分大小写)
strripos() -查找字符串在另一字符串中最后一次出现的位置(不区分大小写)
语法
strpos(string,find,start)
参数
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。
技术细节
返回值: 返回字符串在另一字符串中第一次出现的位置,如果没有找到字符串则返回 FALSE。注释: 字符串位置从 0 开始,不是从 1 开始。
实例
查找 "php" 在字符串中第一次出现的位置:
<?php echo strpos("I love php, I love php too!","php"); ?>
运行结果:
7
更多相关技术文章,请访问PHP中文网!

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