PHP的JSON封装、转变及输出操作示例

protected function renderJSON($data=[], $msg ="ok", $code = 200){    //设置格式    header('Content-type: application/json');    //输出json格式的内容    print_r(json_encode([      "code" => $code,      "msg"  => $msg,      "data" => $data,      "req_id" => uniqid()    ]));    //结束    return Yii::$app->end();}

<?php// 告诉浏览器以json编码header('Content-type:text/json');$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';// 没有设置则输出对象var_dump(json_decode($json));echo "<br>";// 为true则为输出数组var_dump(json_decode($json, true));echo "<br>";$array=array('a','f','q','d','a','g');var_dump(json_encode($array,JSON_HEX_TAG));?>

<?php// 告诉浏览器以json编码header('Content-type:text/json');$json = '{"fruit":{{"apple":"苹果"},{"banana":"苹果"}}';// string(49) "{"fruit":{{"apple":"苹果"},{"banana":"苹果"}}"var_dump($json);