Detailed explanation of method examples for implementing quick sorting in PHP

This article mainly introduces how to simply implement quick sorting in PHP, involving PHP's operating skills for array and string. It has certain reference value. Friends who need it can Refer to the following

The example of this article describes how to simply implement quick sorting in PHP. Share it with everyone for your reference. The specific implementation method is as follows

function quicksort($seq)
{
 if(!count($seq)) return $seq;
 $k = $seq[0];
 $x = $y = array();
 for($i=count($seq); --$i;)
 {
  if($seq[$i] <= $k)
  {
   $x[] = $seq[$i];
  }
  else
  {
   $y[] = $seq[$i];
  }
 }
 return array_merge(quicksort($x),array($k),quicksort($y));
}

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