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HomeBackend DevelopmentPHP TutorialPHP中substr_count()函数获取子字符串出现次数的方法_php技巧

PHP中substr_count()函数获取子字符串出现次数的方法_php技巧

May 16, 2016 pm 08:00 PM
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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:

<&#63;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
&#63;>

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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