PHP에서 삽입 정렬을 구현하는 방법은 무엇입니까?

<?php

function insertion_Sort($my_array)
{
    for($i=0;$i<count($my_array);$i++){
        $val = $my_array[$i];
        $j = $i-1;
        while($j>=0 && $my_array[$j] > $val){
            $my_array[$j+1] = $my_array[$j];
            $j--;
        }
        $my_array[$j+1] = $val;
    }
    return $my_array;
}
$test_array = array(3, 0, 2, 5, -1, 4, 1);
echo "原始数组:\n";
echo implode(&#39;, &#39;,$test_array );
echo "\n排序后数组 :\n";
print_r(insertion_Sort($test_array));

原始数组: 3, 0, 2, 5, -1, 4, 1 
排序后数组 : 
Array ( 
[0] => -1 
[1] => 0 
[2] => 1 
[3] => 2 
[4] => 3 
[5] => 4 
[6] => 5 
)