<?php
/**PHP把數組轉換為JSON字符串**/
$arr = [10,'Tom',true, '2015-10-15'];
//echo $arr;
echo json_encode($arr);//編碼為JSON字符串
$arr = ['eid'=>10,'ename'=>'Tom','isMarried'=>true, 'birthday'=>'2015-10-15'];
//echo $arr;
echo json_encode($arr);//編碼為JSON字符串
//結論：索引數組會被json_encode轉換為JSON數組，關聯數組會被json_encode轉換為JSON對象
?>
結果如下
[10,"Tom",true,"2015-10-15"]
{"eid":10,"ename":"Tom","isMarried":true,"birthday":"2015-10-15"}