Can't concatenate 2 arrays in PHP

✔ Recommended Answer

Both will have a key of 0, and that method of combining the arrays will collapse duplicates. Try using array_merge() instead.

$arr1 = array('foo'); // Same as array(0 => 'foo')$arr2 = array('bar'); // Same as array(0 => 'bar')// Will contain array('foo', 'bar');$combined = array_merge($arr1, $arr2);

If the elements in your array used different keys, the + operator would be more appropriate.

$arr1 = array('one' => 'foo');$arr2 = array('two' => 'bar');// Will contain array('one' => 'foo', 'two' => 'bar');$combined = $arr1 + $arr2;

Source: stackoverflow.com

Answered By: awgy

Method #2

You can concatenate two arrays in PHP using the array_merge() function. Here's an example:

php
<?php

// define two arrays
$array1 = ['apple', 'banana', 'orange'];
$array2 = ['grape', 'kiwi', 'pineapple'];

// concatenate the arrays using array_merge()
$concatenated_array = array_merge($array1, $array2);

// print the concatenated array
print_r($concatenated_array);

?>

In this example, we define two arrays $array1 and $array2. We then concatenate the arrays using array_merge(), which returns a new array that contains all the elements from both arrays. Finally, we print the concatenated array using print_r(). The output should be:

csharp
Array
(
    [0] => apple
    [1] => banana
    [2] => orange
    [3] => grape
    [4] => kiwi
    [5] => pineapple
)

If you want to preserve the keys of the original arrays, you can use the + operator to merge the arrays instead:

php
<?php

// define two arrays
$array1 = ['a' => 'apple', 'b' => 'banana', 'o' => 'orange'];
$array2 = ['g' => 'grape', 'k' => 'kiwi', 'p' => 'pineapple'];

// concatenate the arrays using the + operator
$concatenated_array = $array1 + $array2;

// print the concatenated array
print_r($concatenated_array);

?>

In this example, we use the + operator to concatenate the arrays while preserving the keys. The output should be:

csharp
Array
(
    [a] => apple
    [b] => banana
    [o] => orange
    [g] => grape
    [k] => kiwi
    [p] => pineapple
)