Are there any built-in PHP functions that can be used to merge arrays in the desired format?

To merge arrays in PHP in the desired format, you can use the array_merge function. This function merges the elements of one or more arrays together into a single array. You can pass multiple arrays as arguments to the function to merge them together.

$array1 = ['a', 'b', 'c'];
$array2 = ['d', 'e', 'f'];
$mergedArray = array_merge($array1, $array2);
print_r($mergedArray);