The parameter is error.
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<b>Fatal error</b>:  Uncaught Error: Call to a member function fetch_assoc() on boolean in /www/wwwroot/taoyoyo.net-ty/ua7.php:49
Stack trace:
#0 {main}
  thrown in <b>/www/wwwroot/taoyoyo.net-ty/ua7.php</b> on line <b>49</b><br />