TheAlgorithms-PHP/sorting/insertionSort.php

<?php
//works perfectly if your array nearly sorted
function insertionSort(array $array){

    for ($i=1;$i<count($array);$i++){
        $currentVal=$array[$i];
        for ($j=$i-1;$j>=0&&$array[$j]>$currentVal;$j--){
          $array[$j+1]=$array[$j];
        }
        $array[$j+1]=$currentVal;
    }
    return $array;
}