PHP写的归并排序。谁能看的懂？。。。

<code class="lang-php"><br> <?php

function  merge($frist=array(),$second=array(),$attribute=''){
       $key=0;
       $c=0;
       $d=0;
        $temp=array();
        for($a=0;$a<count($frist);$a++){


            for($b=$c;$b<count($second);$b++){
            if($frist[$a]<=$second[$b]){
                $d++;
                $temp[$key]=$frist[$a];
                 $key++;
                 break;
            }
            else{
                $c++;
            $temp[$key]=$second[$b];
            $key++;

            }

            }
        }

    if($frist[$d-1]<=$second[$c-1]){
        for($d;$d<count($frist);$d++){
            array_push($temp, $frist[$d]);
        }
    }
    else{
 for($b;$b<count($second);$b++){
            array_push($temp, $second[$b]);
        }
    }
     return $temp;

    }
$f=array(1,2,3,4,5,6,9,10,100,101);
$s=array(1,2,3,4,8,20,21,22,300);
$sf=merge($f,$s);
print_r($sf);
</code>

<code class="lang-php"><br> <?php

function  merge($frist=array(),$second=array(),$attribute=''){
       $key=0;
       $c=0;
       $d=0;
        $temp=array();
        for($a=0;$a<count($frist);$a++){


            for($b=$c;$b<count($second);$b++){
            if($frist[$a]<=$second[$b]){
                $d++;
                $temp[$key]=$frist[$a];
                 $key++;
                 break;
            }
            else{
                $c++;
            $temp[$key]=$second[$b];
            $key++;

            }

            }
        }

    if($frist[$d-1]<=$second[$c-1]){
        for($d;$d<count($frist);$d++){
            array_push($temp, $frist[$d]);
        }
    }
    else{
 for($b;$b<count($second);$b++){
            array_push($temp, $second[$b]);
        }
    }
     return $temp;

    }
$f=array(1,2,3,4,5,6,9,10,100,101);
$s=array(1,2,3,4,8,20,21,22,300);
$sf=merge($f,$s);
print_r($sf);
</code>

<code class="lang-php">$arrayA=array(1,3,2,4,5,6,9,10,100,101);
$arrayB=array(1,2,3,103,7,8,20,21,22,300);

$arrayMerge=array_merge($arrayA,$arrayB);
function bubbleSort($array){
    $count=count($array);
    for($i=0;$i<$count-1;$i++){//循环比较
        for($j=$i+1;$j<$count;$j++){
            if($array[$j]<array[$i]){//执行交换
                $temp=$array[$i];
                $$array[$i]=$array[$j];
                $array[$j]=$temp;
            }
        }
    }
    return$array;
}
var_dump(bubbleSort($arrayMerge));
</code>