//JSON字符串
$a4 = '{"a":1,"b":2}'
//数组
$a3 = array('a'=>1,'b'=>2)
//JSON字符串转数组
$a5 = json_decode($a4,true);
//数组转JSON
$a6 = json_encode($a3);
//JSON字符串
$a4 = '{"a":1,"b":2}'
//数组
$a3 = array('a'=>1,'b'=>2)
//JSON字符串转数组
$a5 = json_decode($a4,true);
//数组转JSON
$a6 = json_encode($a3);