How to solve the fatal error in require_once...

Error with PHP 5.6 to PHP 7.2.4. Include_once don´t work...

Getting error when using a function defined inside a php-file from another php-file...

include_once(): failed to open stream: No such file or directory - PHP...

Get an error when calling a function from a different include_once file?...

include_once works in one page but not other, no errors with displaying_error on...

PHP - variable inclusion not working with include_once inside a namespace...

PHP - include_once/include not working...

Wordpress - Include_once root files...