In PHP, use recursive depth to merge multiple arrays

Function source code ：

// Import the array to be merged , quote $array Array receive 
function merge(array &$array,array ...$mergeArray): array
{
    foreach ($mergeArray as $item){
        mergeOne($array,$item); // Execute the merge function for each array to be merged 
    }
    return $array;
}

// If only two arrays need to be merged , You can also use this function directly 
function mergeOne(&$array,$pushArray)
{
    foreach ($pushArray as $key=>$item){ // Cycle through key values 
        if (is_array($item)){ // If the elements to be merged are also arrays , Make a deep merger 
            if(isset($array[$key])&&is_array($array[$key])){ // If the element corresponding to the original array and the key name is also an array 
                mergeOne($array[$key],$item); // Recursive deep merge 
            }else{// If the element corresponding to the key name of the original array is not an array , Directly covered 
                $array[$key]=$item;
            }
        }else{ // If the element to be merged is not an array , Assign directly by key name 
            $array[$key]=$item;
        }
    }
}

Examples of use ：

$a=[
    "a"=>10,
    "b"=>[
        "b.a"=>10
    ],
    "c"=>[
        "c.a"=>50,
        "c.b"=>60,
    ]
];
$b=[
    "a"=>20,
    "b"=>30,
    "c"=>[
        "c.a"=>40
    ]
];
$c=[
    "a"=>30,
    "b"=>[
        "b.a"=>40
    ],
    "c"=>[
        "c.a"=>50,
        "c.c"=>100
    ]
];
// Merge multiple arrays 
merge($a,$b,$c);
var_dump($a);
// Merge two arrays 
mergeOne($a,$b);
var_dump($a);

Sample results ：

// Merge $a $b $c
[
  "a" => 30
  "b" => [
    "b.a" => 40
  ]
  "c" => [
    "c.a" => 50
    "c.b" => 60
    "c.c" => 100
  ]
]
// Merge $a $b
[
  "a" => 20
  "b" => 30
  "c" =>  [
    "c.a" => 40
    "c.b" => 60
    "c.c" => 100
  ]
]