How to add multiple arrays to a subarray? - php

Question

I have the following three arrays of objects:
First Array: $array1
Array (
[0] => Array (
[id] => 1
[name] => world
)
)
Second Array: $array2
Array (
[count] => 1
)
Third Array: $array3
Array (
[KM] => 2
)
I want to add the associative elements from $array2 and $array3 into the subarray at $array1[0].
Desired output:
Array (
[0] => Array
(
[id] => 1
[name] => world
[count] => 1
[KM] => 2
)
)

Answer 1

This is how you would use array_merge()
<?php
$array1 = array(array("id" => 1, "name" => "world"));
$array2 = array("KM" => 2);
$array3 = array("count" => 1);
print_r(array(array_merge($array1[0], $array2, $array3)));
?>
Which would output:
Array
(
[0] => Array
(
[id] => 1
[name] => world
[KM] => 2
[count] => 1
)
)

Answer 2

array_merge is the function you've been looking for
Sample code:
$output_array[0] = array_merge($array1[0], $array2, $array3));
print_r($output_array);

Answer 3

This will get you the desired output:
<?php
$array1 = array(array("id" => 1, "name" => "world"));
$array2 = array("KM" => 2);
$array3 = array("count" => 1);
$array1[0] = array_merge($array1[0], $array2, $array3);
print_r($array1);
?>

Answer 4

array_merge() will merge arrays. Problem is, the structure of your $array1 differs from the others. You have an array inside an array. To produce the desired output as specified you would need this:
$array4 = array(
0 => array_merge($array1[0], $array2, $array3)
);
But I believe you want something more like this:
$array4 = array_merge($array1[0], $array2, $array3);

Answer 5

array array_merge ( array $array1 [, array $... ] )
Merges the elements of one or more arrays together so that the values of one are appended to the end of the previous one. It returns the resulting array.
If the input arrays have the same string keys, then the later value for that key will overwrite the previous one. If, however, the arrays contain numeric keys, the later value will not overwrite the original value, but will be appended.
Values in the input array with numeric keys will be renumbered with incrementing keys starting from zero in the result array.