troubleshooting Question

PHP mySql error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE ProductId='x'' at line x

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causewaybayFlag for Canada asked on
PHPMySQL Server
6 Comments2 Solutions857 ViewsLast Modified:
I have create a 'product.php' file that links succesfully to a mySql database. Also, there are 2 other file: an 'add_product.php' file that adds to mySql database through a form; and, a one_product.php file that edit product existing in the database.  The add product works; but the edit returns an error after clicking submit button.  Error message: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE ProductId='x'' at line x. (the error was not there when I tested how the files work together with 4 columns before I started the actual work yesterday.)

The three files, plus the includ files are attached for reference.  Please advise what correction should be done
product.php
add-product.php
one-product.php
common.php
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