Error message

• Warning: Use of undefined constant sidebar - assumed 'sidebar' (this will throw an Error in a future version of PHP) in eval() (line 6 of /home/u0kg4n9w5x3b/public_html/studiopotter.org/modules/php/php.module(80) : eval()'d code).
• Notice: Undefined offset: 1 in eval() (line 8 of /home/u0kg4n9w5x3b/public_html/studiopotter.org/modules/php/php.module(80) : eval()'d code).
• Notice: Trying to access array offset on value of type null in eval() (line 8 of /home/u0kg4n9w5x3b/public_html/studiopotter.org/modules/php/php.module(80) : eval()'d code).
• Warning: Use of undefined constant sidebar - assumed 'sidebar' (this will throw an Error in a future version of PHP) in eval() (line 8 of /home/u0kg4n9w5x3b/public_html/studiopotter.org/modules/php/php.module(80) : eval()'d code).
• Warning: Use of undefined constant bottom - assumed 'bottom' (this will throw an Error in a future version of PHP) in eval() (line 6 of /home/u0kg4n9w5x3b/public_html/studiopotter.org/modules/php/php.module(80) : eval()'d code).