How to count the number of occurrences of a specified character in a string in PHP

This article mainly introduces how PHP counts the number of occurrences of specified characters in a string.

#PHP statistics calculates the number of specified characters and all characters in a string, which is also a common test point in the PHP interview process. So for PHP beginners, it may be difficult. But as long as you master the idea of ​​​​implementing it, it is very simple.

Below we will use a simple example to introduce to you how to count the number of occurrences of a specified character in a string.

PHP code example is as follows:

<?php
$text="php.cn";
$search_char="p";
$count="0";
for($x="0"; $x< strlen($text); $x++)
{
    if(substr($text,$x,1)==$search_char)
    {
        $count=$count+1;
    }
}
echo &#39;"&#39;.$text.&#39;"&#39;."中字符".$search_char."出现的次数是：".$count.&#39;次&#39;;

Here we calculate the number of times the letter p appears in the string php.cn, and the output result is as follows:

Of course we can count the number of times any one of the characters, such as h:

Related function introduction:

strlen function means getting the string length.

substr function means returning a substring of a string. Its syntax:

string substr ( string $string , int $start [, int $length ] )

Returns the string string substring specified by the start and length parameters.

This article is an introduction to the method of counting the number of occurrences of specified characters in a string in PHP. It is also very simple and easy to understand. I hope it will be helpful to friends in need!

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