Question

我有2个阵列：颜色和喜欢的颜色我想输出一个包含所有颜色但最喜欢的颜色的数组，保持相同的排序顺序。

我的例子工作正常，但想知道这是否是正确（最快）的方法谢谢

$colors_arr = array("yellow","orange","red","green","blue","purple");
print "<pre>Colors: ";
print_r($colors_arr);
print "</pre>";

$favorite_colors_arr = array("green","blue");
print "<pre>Favorite Colors: ";
print_r($favorite_colors_arr);
print "</pre>";

$normal_colors_arr = array_diff($colors_arr, $favorite_colors_arr);
print "<pre>Colors which are not favorites: ";
print_r($normal_colors_arr);
print "</pre>"; 

// $sorted_colors_arr = $favorite_colors_arr + $normal_colors_arr;
$sorted_colors_arr = array_merge($favorite_colors_arr, $normal_colors_arr);
print "<pre>All Colors with favorites first: ";
print_r($sorted_colors_arr);
print "</pre>";

输出：

Colors: Array
(
    [0] => yellow
    [1] => orange
    [2] => red
    [3] => green
    [4] => blue
    [5] => purple
)

Favorite Colors: Array
(
    [0] => green
    [1] => blue
)

Colors which are not favorites: Array
(
    [0] => yellow
    [1] => orange
    [2] => red
    [5] => purple
)

All Colors with favorites first: Array
(
    [0] => green
    [1] => blue
    [2] => yellow
    [3] => orange
    [4] => red
    [5] => purple
)

Answer 1

您可以将其缩短为

$sorted_colors_arr = array_unique(array_merge($favorite_colors_arr, $colors_arr);

PHP数组函数，差异和合并

1 个答案: