【PHP】배열의 결합

$fruitsA = [
	0 => 'apple',
	1 => 'banana',
	'a' => 'cherry',
];

$fruitsB = [
	1 => 'orange',
        2 => 'lemon',
        'a' => 'mango',
        'b' => 'peach',
];

+ 연산자

print_r($fruitsA + $fruitsB);
//結果
Array
(
    [0] => apple
    [1] => banana
    [a] => cherry  //$fruitsAの値が優先
    [2] => lemon
    [b] => peach
)

array_merge()

print_r(array_merge($fruitsA, $fruitsB);
//結果
Array
(
    [0] => apple
    [1] => banana
    [a] => mango　//$fruitsBの値が優先
    [2] => orange
    [3] => lemon
    [b] => peach
)