PHP custom function implements the function of randomly exchanging elements in an array

This article mainly introduces the custom function to realize the function of randomly exchanging elements in the array. Interested friends can refer to it. I hope it will be helpful to everyone.

The example in this article describes how PHP randomly swaps elements in an array. The specific analysis is as follows:

This is a custom PHP function that randomly swaps array elements. PHP already has a built-in function shuffle($Array) with the same function. This code should be referred to

// I noticed that there is already a built-in function that
// does the same - so don't use mine ;-)
//
// --> shuffle($Array);
//
// http://de2.php.net/manual/de/function.shuffle.php
//
function RandomizeArray($array){
  // error check:
  $array = (!is_array($array)) ? array($array) : $array;
  $a = array();
  $max = count($array) + 10;
  while(count($array) > 0){    
    $e = array_shift($array);
    $r = rand(0, $max);
    // find a empty key:
    while (isset($a[$r])){
      $r = rand(0, $max);
    }    
    $a[$r] = $e;
  }
  ksort($a);
  $a = array_values($a);
  return $a;
}

Usage example:

/*
** Example:
*/
$test_array = array('why','dont','visit','www','jonas','john','de',':-)');
print implode(", ", $test_array);
print "\n";
print implode(", ", RandomizeArray($test_array));
/*
Example output:
why, dont, visit, www, jonas, john, de, :-)
www, de, jonas, john, visit, why, :-), dont
*/

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's learning.

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