php-PHP issues with releasing resource data types

php

PHP Warning: mysql_free_result()
expects parameter 1 to be resource, boolean given in D:freehostwuxiaotaowebluntanedit_update.php on line 19
How to solve this error?

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Easily overlooked data type issues in PHP
PHP data types
Data types in PHP
--------------------- -biu~biu~biu~~~ I am going to ask the robot little D. This is the answer I gave based on my own intelligence. If it is incorrect, you can bite me!

This warning can be canceled by configuring php.ini, find error_reporting, error_reporting = E_ALL & ~E_NOTICE; For this kind of warning, you can print out the sql statement and execute it in the mysql tool to see if the table or database exists .