我如何从array_intersect()获得区分大小写的返回 [英] How can I get case-sensitive return from array_intersect()

问题描述

我有两个数组，我需要比较它们并从array1返回匹配的值.请在下面引用我的代码，

I have two arrays and I need to compare that and return matched value from array1. Please refer my code below,

$array1 = array("a" => "Green", "Red", "Blue");
$array2 = array("b" => "grEEn", "yellow", "red");
$result = array_intersect(array_map('strtolower', $array1), array_map('strtolower', $array2));

print_r($result);

我的结果是，

Array
(
    [a] => green
    [0] => red
)

但是我的预期结果是我想从array1中获得它，如:

But my expected result is I want get it from array1 like:

Array
(
    [a] => Green
    [0] => Red
)

推荐答案

这是因为您将所有值都转换为小写.只需更改为 array_uintersect() 并使用

This is because you put all values to lowercase. Just change to array_uintersect() and use strcasecmp() as callback function to compare them case-insensitive, like this:

$result = array_uintersect($array1, $array2, "strcasecmp");

输出:

Array ( [a] => Green [0] => Red )

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