turn 2 array into one array

Question

In PHP there is two array:

$x = array( "a" => "0123", "b" => "1234", "c" => "0123");
$y = array( "a" => "3210", "b" => "1234", "d" => "0123");

i wish to get the result in one array like this:

// right
Array
(
[a] => 0123
[b] => 1234
[c] => 0123
[a] => 3210
[d] => 0123
)

I tried with array_merge($x, $y):

// wrong    
Array
(
[a] => 3210
[b] => 1234
[c] => 0123
)

It happen cause there is old database and new database, i am getting both value from both database. If value from both database ist exactly equal, then it needed only on value like this:

[b] => 1234

Please is there some solution in PHP-Code?

You can't have 2 indexes with the same name (a in this case) as stated => [a] => 0123 [b] => 1234 [c] => 0123 [a] => 3210 [d] => 0123 And array_merge gives this result (with the d ) => ["a"]=> string(4) "3210" ["b"]=> string(4) "1234" ["c"]=> string(4) "0123" ["d"]=> string(4) "0123" — ka_lin
– ka_lin, Commented May 23, 2018 at 10:50
This won't happen, key name in an array is unique, it impossible you have two key named 'a' in an array. — Kevin Yan
– Kevin Yan, Commented May 23, 2018 at 10:57
if the key 'a' repeat two time with different values, then consider 'a'=>value1, value2], this way you can have both different values — Gautam Rai
– Gautam Rai, Commented May 23, 2018 at 10:59

theebigbang · Accepted Answer · 2018-05-23 10:57:40Z

2

Becuase of you cant get same keys use array_merge_recursive. It will make muldimensional arrays for same keys.

$ar1 = array("color" => array("favorite" => "red"), 5);

$ar2 = array(10, "color" => array("favorite" => "green", "blue"));

$result = array_merge_recursive($ar1, $ar2);
[color] => Array
    (
        [favorite] => Array
            (
                [0] => red
                [1] => green
            )

        [0] => blue
    )

[0] => 5
[1] => 10

answered May 23, 2018 at 10:57

theebigbang

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1 Comment

ka_lin Over a year ago

You could use the OP's actual data, might be more expresive

Mark · Accepted Answer · 2018-05-23 10:52:54Z

0

Arrays cannot have duplicate keys, if keeping the keys isn't important to you then the following would work fine:

This code is pulled straight from the PHP array_merge documentation.

<?php
$array1 = array("color" => "red", 2, 4);
$array2 = array("a", "b", "color" => "green", "shape" => "trapezoid", 4);
$result = array_merge($array1, $array2);
print_r($result);
?>

Outputs:

Array
(
    [color] => green
    [0] => 2
    [1] => 4
    [2] => a
    [3] => b
    [shape] => trapezoid
    [4] => 4
)

Also see: array merge with duplicates php

answered May 23, 2018 at 10:52

Mark

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