测试php代码效率小函数

function testcode() {

    $time=microtime();

    $arr=explode(' ',$time);

    return $time=$arr[1].$arr[0];

}

$arr = array(3,6,8,2,9,0,7,4,-9);

//冒泡排序

$t1=testcode();

 

for($i=0; $i

 

    for($j=0; $j

        if ($arr[$j]>$arr[$j+1]) {

            list($arr[$j+1],$arr[$j])=array($arr[$j],$arr[$j+1]);

        }

        

    }

    

}

$t2=testcode();

echo "
",$t2-$t1,'
';

//快速排序

function quick_sort($array) { 

      if (count($array) <= 1) return $array;

 

      $key = $array[0]; 

      $left_arr = array(); 

      $right_arr = array();

 

      for ($i=1; $i

              if ($array[$i] <= $key) 

                      $left_arr[] = $array[$i]; 

              else 

                      $right_arr[] = $array[$i]; 

      }

 

      $left_arr = quick_sort($left_arr); 

      $right_arr = quick_sort($right_arr);

 

      return array_merge($left_arr, array($key), $right_arr); 

}

$arr = array(3,6,8,2,9,0,7,4,-9);

$t1=testcode();

quick_sort($arr);

$t2=testcode();

echo "
",$t2-$t1,'
';