http://blog.naver.com/questzz/220816843067
<?php
//php array() 선언 하는 방법
$array_01 = [];
$array_02 = array();
$array_03 = ["id"=>"hello", "name"=>"kyeongrok"];
//array_03 출력
echo "<br/>-------array_03 출력------------<br/>";
var_dump ($array_03);
$user_list = [];
array_push($user_list, array("id"=>10, "name"=>"kyeongrok"));
array_push($user_list, array("id"=>11, "name"=>"selli"));
//user_list 출력
echo "<br/>---------user_list 출력----------<br/>";
var_dump ($user_list);
//array_01에 array_03을 push함
array_push($array_01, $array_03);
//array_01 출력
echo "<br/>--------array_01 출력-----------<br/>";
var_dump ($array_01);
//json_encode
echo "<br/>---------json_encode----------<br/>";
echo json_encode($user_list);
?>
출처: http://krksap.tistory.com/815 [경록김의 뷰티풀 프로그래밍]