Introduction to PHP function to find the number of occurrences of a string_PHP Tutorial

Searching for the number of occurrences of a string in PHP can be achieved through the substr_count() function. Let me introduce these functions to you in detail. ​

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

/$haystack represents the parent string, $needl represents the character to be found
//$offset represents the starting point of the search, $length represents the length of the search, both are optional parameters

Example:

The code is as follows

Copy code

代码如下	复制代码
$str="this is a test";  echo substr_count($str,'is') .' ';  echo substr_count($str,'is',3) .' ';  echo substr_count($str,'is',3,3) .' '; ?>

$str="this is a test";

echo substr_count($str,'is') .'
';

echo substr_count($str,'is',3) .'

代码如下	复制代码
$str = 'http://www.bkjia.com 爱程序网_软件编程入门教程_软件设计交流_字符出现次数'; echo substr_count($str,'w').' '; echo substr_count($str,'t').' '; echo substr_count($str,'爱程序网'); ?> 输出结果为： //以下是输出结果 3 2 1

';

echo substr_count($str,'is',3,3) .'

';

?>

Example:

The code is as follows	Copy code
$str = 'http://www.bkjia.com AiProgram.com_Software Programming Introduction Tutorial_Software Design Communication_Number of Character Occurrences'; echo substr_count($str,'w').' '; echo substr_count($str,'t').' '; echo substr_count($str,'爱program.com'); ?> The output result is: //The following is the output result 3 2 1

Share some more string search functions strstr — Find the first occurrence of a string stristr strstr case-insensitive version strpos - Find the first occurrence of a string string substr ( string $string , int $start [, int $length ] ) string strrchr ( string $haystack , mixed $needle ) strripos - calculates the position of the last occurrence of the specified string in the target string (case-insensitive) stripos - Find the first occurrence of a string (insensitive)

strrpos - calculates the position of the last occurrence of the specified string in the target string

http://www.bkjia.com/PHPjc/445621.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445621.htmlTechArticleFinding the number of occurrences of a string in php can be achieved through the substr_count() function. Let me tell you about it below The students introduced these functions in detail. substr_count($haystack, $needle [,...