php开发问题

Connection failed: Access denied for user #39;#39;username#39;@#39;localhost#39; (using password: YES)(连接失败:用户 username@localhost 访问被拒绝(使用密码:YES))
Codeigniter error when trying to connect to database using mysqli(尝试使用 mysqli 连接到数据库时出现 Codeigniter 错误)
Mysqli DELETE QUERY not working in PHP Script(Mysqli DELETE QUERY 在 PHP 脚本中不起作用)
Increment value on MySQLi Update(MySQLi 更新的增量值)
Deprecated MySQL extension in PHP 5.5.x(PHP 5.5.x 中已弃用的 MySQL 扩展)
Cannot use call_user_func_array on mysqli_stmt object(不能在 mysqli_stmt 对象上使用 call_user_func_array)
Extend mysqli_result(扩展 mysqli_result)
mysqli_num_rows() expects parameter 1 to be mysqli_result, object(mysqli_num_rows() 期望参数 1 是 mysqli_result,对象)
MYSQLi bind_result is returning null(MYSQLi bind_result 返回 null)
Mysqli Prepare Statements + Binding Order BY(Mysqli Prepare 语句 + 绑定顺序 BY)
Why is MySQL returning the same results while using RAND() in the SELECT statement?(为什么 MySQL 在 SELECT 语句中使用 RAND() 时返回相同的结果?)
Errors appearing in mysqli code and call_user_func_array()(mysqli 代码和 call_user_func_array() 中出现的错误)