PHP中substr_count()函数获取子字符串出现次数的方法_php技巧
本文实例讲述了PHP中substr_count()函数获取子字符串出现次数的方法。分享给大家供大家参考,具体如下:
PHP中的substr_count()可用于计算指定字符串中子字符串出现的次数。
substr_count()函数定义如下:
substr_count(string,substring,start,length)
参数说明:
string 必需。规定被检查的字符串。
substring 必需。规定要搜索的字符串。
start 可选。规定在字符串中何处开始搜索。
length 可选。规定搜索的长度。
示例代码如下:
<?php $str="脚本之家提供大量脚本代码及脚本特效下载"; echo substr_count($str,"脚本"); echo "<br/>"; echo substr_count($str,"脚本",16);//指定在第16个字符后开始搜索 echo "<br/>"; echo substr_count($str,"脚本",16,10);//指定从第16个字符开始往后搜索10个字符结束 ?>
运行结果如下:
3 2 1
更多关于PHP字符串操作相关内容可查看本站专题:《php字符串(string)用法总结》
希望本文所述对大家PHP程序设计有所帮助。

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