代码之家 › 专栏 › 技术社区 › Rounin

在PHP中使用+运算符组合数组

associative-array arrays php

Rounin · 技术社区 · 4 年前

我最近发现 + 可用于在PHP中组合数组。

将关联数组添加到关联数组:

$array1 = ["The" => "quick", "brown" => "fox"];
$array2 = ["jumps" => "over", "the" => "lazy dog"];

$combinedArray = $array1 + $array2;

/* Gives:

Array
(
    [The] => quick
    [brown] => fox
    [jumps] => over
    [the] => lazy dog
)

*/

将关联数组添加到索引数组:

$array1 = ["The", "quick", "brown", "fox"];
$array2 = ["jumps" => "over", "the" => "lazy dog"];

$combinedArray = $array1 + $array2;

/* Gives:

Array
(
    [0] => The
    [1] => quick
    [2] => brown
    [3] => fox
    [jumps] => over
    [the] => lazy dog
)

*/

将索引数组添加到关联数组:

$array1 = ["The" => "quick", "brown" => "fox"];
$array2 = ["jumps", "over", "the", "lazy dog"];

$combinedArray = $array1 + $array2;

/* Gives:

Array
(
    [The] => quick
    [brown] => fox
    [0] => jumps
    [1] => over
    [2] => the
    [3] => lazy dog
)

*/

$array1 = ["The", "quick", "brown", "fox"];
$array2 = ["jumps", "over", "the", "lazy dog"];

$combinedArray = $array1 + $array2;

/* Gives:

Array
(
    [0] => The
    [1] => quick
    [2] => brown
    [3] => fox
)

*/

其中一个和其他的不一样。

为什么最后一个不起作用?