将数组添加到现有PHP数组元素

$existingArray = array('apple', 'banana');
$newArray = array('orange', 'grape');
$result = array_merge($existingArray, $newArray);
print_r($result);

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
    [3] => grape
)

$existingArray = array('apple', 'banana');
$newArray = array('orange', 'grape');
$result = $existingArray + $newArray;
print_r($result);

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
    [3] => grape
)