Simple usage example of preg_replace_callback function in php

The example in this article describes the usage of preg_replace_callback function in php. Share it with everyone for your reference, as follows:

mixed preg_replace_callback ( mixed pattern, callback callback, mixed subject [, int limit] )

The behavior of this function is almost the same as preg_replace(), except that it does not provide a replacement parameter , instead specify a callback function. This function takes as input an array of matches in the target string and returns the string used for replacement.

For example:

preg_replace($skx,$imsz2,$neirong);

For example: There are multiple $skx in $neirong. I need to get a different ID every time I replace it

Example:

<?php
$str='this is a test for this string includes many this';
$replace='/this/x';
$result=preg_replace_callback(
  $replace,
  function($ms){
   static $i;
   $i=$i+1;
   return "that($i)";
  },
  $str
 );
echo $result,"/n";

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