php对数组内元素进行随机调换的方法

// 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;}

/*** 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*/