PHP 二维array转换json的实例讲解

json_encode($param_array);

{
 "appid": "1500001105",
 "nonce": 32490,
 "timestamp": 1458195253,
 "signature": "bf13fe77f46a96edba1a0e2b84fce66580b2f50b",
 "param": {
  "userid": "bonnie"
 }
}

$param = array(
 'userid'=>'bonnie'
);
$params = array(
 'appid'=>'1500001105',
 'nonce'=>$nonce,
 'timestamp'=>$timestamp,
 'signature'=>$signature,
 'param'=>$param,
);
$params_json = json_encode($params);