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PHP实现常见排序

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Release: 2016-06-13 11:34:38
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//插入排序(一维数组)
function insert_sort($arr){
    $count = count($arr);
    for($i=1; $i         $tmp = $arr[$i];
        $j = $i - 1;
        while($arr[$j] > $tmp){
            $arr[$j+1] = $arr[$j];
            $arr[$j] = $tmp;
            $j--;
        }
    }
    return $arr;
}
//选择排序(一维数组)
function select_sort($arr){
    $count = count($arr);
    for($i=0; $i         $k = $i;
        for($j=$i+1; $j             if ($arr[$k] > $arr[$j])
            $k = $j;
            if ($k != $i){
                $tmp = $arr[$i];
                $arr[$i] = $arr[$k];
                $arr[$k] = $tmp;
            }
        }
    }
    return $arr;
}
 
//冒泡排序(一维数组)
function bubble_sort($array){
    $count = count($array);
    if ($count     for($i=0; $i         for($j=$count-1; $j>$i; $j--){
            if ($array[$j]                 $tmp = $array[$j];
                $array[$j] = $array[$j-1];
                $array[$j-1] = $tmp;
            }
        }
    }
    return $array;
}
 
//快速排序(一维数组)
function quick_sort($array){
    if (count($array)     $key = $array[0];
    $left_arr = array();
    $right_arr = array();
    for ($i=1; $i         if ($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);
}

 


 

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