Sorting the array with Custom Key in PHP

问题

I have an array of one structure like below

$array1 = array(
[123] => array('1'=>'1','2'=>'3'),
[345] => array('1'=>'3','2'=>'5'),
[789] => array('1'=>'1','2'=>'5'),
[567] => array('1'=>'6','2'=>'5'),
);

and another array structure as $array2 = array(567,345,789,123);

Now i want to sort this one with php sort function, i mean sort the first array with second one to looks like the desired output something like below

$array1 = array(
[567] => array('1'=>'6','2'=>'5'),
[345] => array('1'=>'3','2'=>'5'),
[789] => array('1'=>'1','2'=>'5'),
[123] => array('1'=>'1','2'=>'3'),
);

I want to get these desired result with any sorting function which is already exists.

Thanks.

回答1:

Loop your $array2 and populate a third array as follows:

$array1 = array(
    [123] => array('1'=>'1','2'=>'3'),
    [345] => array('1'=>'3','2'=>'5'),
    [789] => array('1'=>'1','2'=>'5'),
    [567] => array('1'=>'6','2'=>'5'),
);

$array2 = array(567,345,789,123);

$orderedArray = array();
foreach ($array2 as $key) {
    $orderedArray[$key] = $array1[$key];
}

And if you want a function:

function orderArray($arrayToOrder, $keys) {
    $ordered = array();
    foreach ($keys as $key) {
        if (isset($arrayToOrder[$key])) {
             $ordered[$key] = $arrayToOrder[$key];
        }
    }
    return $ordered;
}

$myOrderedArray = orderArray($array1, $array2);

回答2:

Or you can use uksort function of php as

uksort($array1, function($a, $b)use($array2) {
    foreach($array2 as $value){
        if($a == $value){
            return 0;
            break;
        }
        if($b == $value){
            return 1;
            break;
        }
    }
});

Fiddle

回答3:

How about this?

$sortedArray = array_replace(array_flip($array2), $array1);

来源：https://stackoverflow.com/questions/31055645/sorting-the-array-with-custom-key-in-php

标签

php

arrays

sorting