PHP-按数组键对数组进行排序 [英] PHP - sort array by array key

问题描述

我在PHP中具有以下数组:

I have this array in PHP:

在PHP API中，我有此数组，并希望按custom_price排序ot，但不知道如何实现..

In PHP APIs I have this array and want to sort ot by custom_price, but not getting how to acheive so ..

Array
(
    [0] => Array
        (
            [id] => 1204
            [custom_price] => 33.1500
        )


    [1] => Array
        (
            [id] => 1199
            [custom_price] => 16.83
        )

    [2] => Array
        (
            [id] => 1176
            [custom_price] => 16.83
        )

    [3] => Array
        (
            [id] => 1173
            [custom_price] => 11.73
        )

    [4] => Array
        (
            [id] => 1170
            [custom_price] => 22.5
        )
)

我如何从..高到低&进行排序从低到高..由custom_price

How i can sort from .. high to low & low to high .. by custom_price

推荐答案

使用usort:

从高到低

usort($input, function ($a, $b) {return $a['custom_price'] < $b['custom_price'];});
print_r( $input );

从低到高

usort($input, function ($a, $b) {return $a['custom_price'] > $b['custom_price'];});
print_r( $input );

http://php.net/manual/en/function.usort.php

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