使用 PHP 对字符串数组进行排序

Question

I have an ID:Name Array

example:

$datas = array();
$datas[2345] = "Banana";
$datas[5740] = "Apple";
$datas[98763]= "Orange";

My final but is to sort the array alphabetically.

var_dump($datas);
//"4536" => "Apple", "2345" => Banana", "98763" => "Orange"

I try with usort but it's not working.

 usort($datas, function ($a, $b) {
            return strcasecmp($a,$b);
        });

How can I sort alphabetically that king of arrays?

Answer 1

使用asort函数：

asort($datas);

Answer 2

You don't even need a usort simply use asort as

asort($datas);

Or you can simply use uasort instead of usort as you need to have your keys also so simply use as

uasort($datas,'strcasecmp');

Answer 3

asort is what you're looking for, it will sort it alphabetically as you can see below.

$datas = array();
$datas[2345] = "Banana";
$datas[5740] = "Apple";
$datas[98763]= "Orange";

asort($datas);

var_dump($datas);

array(3) { [5740]=> string(5) "Apple" [2345]=> string(6) "Banana" [98763]=> string(6) "Orange" }

Answer 4

asort(); 

From PHP Manual

This function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is used mainly when sorting associative arrays where the actual element order is significant.

$datas = array();
$datas[2345] = "Banana";
$datas[5740] = "Apple";
$datas[98763]= "Orange";

asort($datas);

Now when you wish to see the output with var_dump($datas); you'd see:

array(3) {[5740]=> string(5) "Apple" [2345]=> string(6) "Banana" [98763]=> string(6) "Orange"}

Answer 5

Use asort() from php array functions

Please refer Array Functions

    <?php
    $datas = array();
    $datas[2345] = "Banana";
    $datas[5740] = "Apple";
    $datas[98763]= "Orange";

    asort($datas);

    print_r($datas);
    //Array ( [5740] => Apple [2345] => Banana [98763] => Orange )