Описание тега array-merge

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Array-merge means elements of one or more arrays will be merged together into a single array.

Array-merge means merging the elements of one or more arrays together into a single array so that the values of one are appended to the end of the previous one.

array array_merge ( array $array1 [, array $... ] )

Example

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

Result

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

Reference