如何将关联数组推送到一个2D数组

Question

can you please let me know how I can load two associated array into an index array through two separate functions like this:

 $allData =[];

 function func1(){
  $func1_arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
   array_push($allData, $func1_arr);
}
func1();

function func2(){
  $func2_arr = array('a' => 45, 'b' => 23, 'c' => 88, 'd' => 33, 'e' => 82);
array_push($allData, $func2_arr);
}
func2();

echo json_encode($allData);

I also tried passing the $allData as parameter of func1($allData) and func2($allData) but I am getting empty [ ] in return

$allData =[];

function func1($allData){
  $func1_arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
   array_push($allData, $func1_arr);
}
func1($allData);

function func2($allData){
  $func2_arr = array('a' => 45, 'b' => 23, 'c' => 88, 'd' => 33, 'e' => 82);
array_push($allData, $func2_arr);
}
func2($allData);

echo json_encode($allData);

Update

Here is what i have tried with with return

$allData =[];

function func1($allData){
  $func1_arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
   return array_push($allData, $func1_arr);
}
func1($allData);

function func2($allData){
  $func2_arr = array('a' => 45, 'b' => 23, 'c' => 88, 'd' => 33, 'e' => 82);
 return array_push($allData, $func2_arr);
}
func2($allData);

echo json_encode($allData);

and still getting empty array in result

$allData =[];

function func1($allData){
  $func1_arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
    array_push($allData, $func1_arr);
    return $allData;
}
func1($allData);

function func2($allData){
  $func2_arr = array('a' => 45, 'b' => 23, 'c' => 88, 'd' => 33, 'e' => 82);
  array_push($allData, $func2_arr);
  return $allData;
}
func2($allData);

echo json_encode($allData);

Answer 1

Ok I got it myself ,I just do not know why some genius! are voting down my question

$allData =[];

function func1(){
global $allData;
  $func1_arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
   array_push($allData, $func1_arr);
}
func1();

function func2(){
global $allData;
  $func2_arr = array('a' => 45, 'b' => 23, 'c' => 88, 'd' => 33, 'e' => 82);
array_push($allData, $func2_arr);
}
func2();

echo json_encode($allData);