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php中substr

Jun 06, 2016 pm 07:56 PM
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欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 php中substr_count函数用法简介: 在PHP可以很容易的利用substr_count函数计算一个指定的子字符串在所给的字符串****现的次数。 语法: int substr_count(string $haystack,string $needle[,int $of

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  php中substr_count函数用法简介:

  在PHP可以很容易的利用substr_count函数计算一个指定的子字符串在所给的字符串****现的次数。

  语法:

  int substr_count(string $haystack,string $needle[,int $offset[,int $length]])

  参数说明:

  Haystack:指定要检查的字符串

  Needle:指定要插入的字符串

  Offset:指定在字符串中何处开始搜索默认为0

  Length:指定搜索的长度

  实例:

  

  $haystack="this is a test contents";

  $handle="is";

  $count= substr_count($haystack,$handle);

  echo "在 ".$haystack." 字符串中共出现 ".$count." 次 ".$handle;

  ?>

php中substr

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