PHP database connection succeeded, but data cannot be inserted

Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1045] Access denied for user ' ha-ha '@'localhost' (using password: NO) in E:\member\postReg.php:17 Stack trace: #0 E:\member\postReg.php(17): PDO->__construct('mysql:host=;dbn...', '\xE5\x93\x88\xE5\x93\x88', NULL) #1 {main} thrown in E:\member\postReg.php on line 17
What's wrong solve Very anxious

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Take the answer ：

Remove the circled code , use mysqli Why build another PDO What are the linked objects for , It is not necessary to use PDO 了

If you have other questions, you can continue to communicate ~

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