substr_count

PHP substr_count()函数 (PHP substr_count() Function)

substr_count() function is a string function in PHP, it is used to find the total number of occurrences of a substring in the given string.

substr_count()函数是PHP中的字符串函数，用于查找给定字符串中子字符串出现的总数。

Syntax:

句法：

substr_count(string, substring, [offset], [length]);

Here,

这里，

• string is the main string in which we have to perform the search for the substring.

  string是我们必须在其中搜索子 字符串的主要字符串。

• substring is the part of the string that we have search in the string.

  substring是我们在字符串中搜索的字符串的一部分 。

• offset is an optional parameter, it defines the start index – from where you want to search the string. Its default value is 0.

  offset是一个可选参数，它定义了起始索引，即您要从中搜索字符串的位置。 默认值为0。

• length is also an optional parameter, it defines length of the search i.e. search operation will start from offset and finishes with offset+length position.

  length也是一个可选参数，它定义了搜索的长度，即搜索操作将从offset开始，并以offset + length位置结束。

Examples:

例子：

Input:     str = "Hello friends how are your friends?";    substring = "friends";    Output:    2    Input:    str = "Hello friends how are your friends?";    substring = "Hello";    Output:    1    Input:    str = "Hello friends how are your friends?";    substring = "Hi";    Output:    0

PHP code:

PHP代码：

Output

输出量

friends found 2 times.Hi found 0 times.friends found 1 times.friends found 0 times.

翻译自:

substr_count