PHP parsing json two-dimensional array string

Data in the client's request body: [{"msg_id": 1, "Msg_status": "Has_read"}, {"msg_id": 2, "Msg_status": "Has_read"}] is a two-dimensional array string

$json _data = Json_decode ($GLOBALS [' Http_raw_post_data '], true);
In fact, with this sentence can be implemented JSON two-dimensional array string to PHP two-dimensional array variable, do not have to dynamically construct a two-dimensional array
The second parameter of the function is important: the output of the PHP object is not true, and the output of the PHP array is true.

   /** * Bulk update of message status based on uploaded message ID collection*/     Public functionUpdate_status_batch () {//data that needs to be updated/*$data = Array (' msg_id ' = 1, ' msg_status ' = ' has_read '            '), Array (' msg_id ' = 2, ' msg_status ' = ' has_read ') )        );*/        //The return value is the JSON object by default, and when the second optional argument is true, the array is returned, and if it is a JSON string for a two-dimensional array, it is converted to a two-dimensional array of PHP variables .        $json _data= Json_decode ($GLOBALS[' Http_raw_post_data '],true);/*//number of elements//$item _num = count ($json _data);        Defines a two-dimensional array $array = array ();                foreach ($json _data as $item) {$array _unit = array (' msg_id ' = = $item->msg_id,            ' Msg_status ' = $item->msg_status);        Append element Array_push ($array, $array _unit) to a two-dimensional array; }*/        //Update, the return value is the number of record bars affected by the update        $result=$this->m_user_msg->update_batch ($json _data, ' msg_id '); if(!Empty($result)){            //if it is not empty, the return succeeds            $return _data[' Code ']= ' 100 '; $return _data[' msg ']= ' processing success '; //string-to-numeric processing is required            $return _data[' Data ']=$result; }Else{            $return _data[' Code ']= ' 400 '; $return _data[' msg ']= ' processing failed '; $return _data[' Data ']=$json _data; }        //settings are returned to the requester in JSON        Header(' Content-type:application/json; Charset=utf-8 '); //convert to JSON string        Echo  stripslashes(Json_encode ($return _data,Json_unescaped_unicode))    ; }

PHP parsing json two-dimensional array string