实例如下：

<?phpclass DBDA{ public $host="localhost"; public $uid = "root"; public $pwd = "123"; public $dbname = "mydb"; //成员方法 public function Query($sql,$type=1) { $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname); $r = $db->query($sql); if($type==1) { return $r->fetch_all(); } else { return $r; } } //返回字符串的方法 public function StrQuery($sql,$type=1) { $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname); $r = $db->query($sql); if($type==1) { $attr = $r->fetch_all(); $str = ""; foreach($attr as $v) { $str .= implode("^",$v)."|"; } return substr($str,0,strlen($str)-1); } else { return $r; } } //返回JSON function JSONQuery($sql,$type=1) { $db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname); $r = $db->query($sql); if($type==1) { return json_encode($r->fetch_all(MYSQLI_ASSOC)); } else { return $r; } }}

以上这篇PHP封装返回Ajax字符串和JSON数组的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。