<?php
$array1 = [
"color" => "green"
];
$array2 = [
"color" => "red",
"color" => "blue"
];
$result = array_merge($array1, $array2);
?>
// $result
[
"color" => "green"
"color" => "red",
"color" => "blue"
]
$output = array_merge($array1, $array2);
$all_arrays = array_merge($array1, $array2, $array3, ...);
$a1=array("red","green");
$a2=array("blue","green","yellow");
print_r(array_merge($a1,$a2));
<?php
$array1 = array("color" => "red", 2, 4);
$array2 = array("a", "b", "color" => "green", "shape" => "trapezoid", 4);
$result = array_merge($array1, $array2);
print_r($result);
?>
Array
(
[color] => green
[0] => 2
[1] => 4
[2] => a
[3] => b
[shape] => trapezoid
[4] => 4
)