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Warning: mysqli_query() expects parameter 1 to be mysqli, boolean given in D:\phpStudy\PHPTutorial\WWW\076010010\m\arc.php on line 16

Notice: Trying to get property of non-object in D:\phpStudy\PHPTutorial\WWW\076010010\m\arc.php on line 18
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Warning: mysqli_query() expects parameter 1 to be mysqli, boolean given in D:\phpStudy\PHPTutorial\WWW\076010010\m\arc.php on line 30

Notice: Trying to get property of non-object in D:\phpStudy\PHPTutorial\WWW\076010010\m\arc.php on line 32
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Fatal error: Uncaught Error: Call to a member function close() on boolean in D:\phpStudy\PHPTutorial\WWW\076010010\m\arc.php:43 Stack trace: #0 {main} thrown in D:\phpStudy\PHPTutorial\WWW\076010010\m\arc.php on line 43