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Quick sort in PHP #49

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Quick sort in PHP #49

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23 changes: 23 additions & 0 deletions Algorithms/sorting/quick_sort.php
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Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
<?php

function quick_sort($array){
$left = $right = array();
if(count($array) < 2){
return $array;
}
$pivot_key = key($array);
$pivot = array_shift($array);
foreach($array as $val){
if($val <= $pivot){
$left[] = $val;
}elseif($val > $pivot){
$right[] = $val;
}
}
return array_merge(quick_sort($left),array($pivot_key=>$pivot),quick_sort($right));
}

$array = array(4, 3, 0, 8, -1, 5, 1);
echo 'Original array : '.implode(',',$array).'\n';
$sorted_array = quick_sort($array);
echo 'Sorted array : '.implode(',',$sorted_array);