filesystem - Failed opening required

I am new in wordpress development. Tried include a selfwritten php-file into htdocs/wp-content/plugins/abc/abc.php

IDE sugesting me to use: require_once '../WPNonce/WPNonce.php';

but WordPress contradicts when opening in webbrowser:

Fatal error: require_once(): Failed opening required '../WPNonce/WPNonce.php'

How could i include this php-file (its a class inside)?

I am new in wordpress development. Tried include a selfwritten php-file into htdocs/wp-content/plugins/abc/abc.php

IDE sugesting me to use: require_once '../WPNonce/WPNonce.php';

but WordPress contradicts when opening in webbrowser:

Fatal error: require_once(): Failed opening required '../WPNonce/WPNonce.php'

How could i include this php-file (its a class inside)?

• filesystem

Share Improve this question asked Mar 3, 2019 at 19:02 SL5netSL5net 10544 bronze badges 2

• Is the file you want to include part of your plugin? – Qaisar Feroz Commented Mar 3, 2019 at 20:36
• Later i want to be able to use it in all plugins. right now it is in the plugin folder. imgur/tif3vOv – SL5net Commented Mar 3, 2019 at 22:30

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1 Answer 1

Sorted by: Reset to default 1

WordPress includes many functions for determining paths and URLs to files or directories within plugins, themes, and WordPress itself.

 $plugin_dir = plugin_dir_path( __DIR__ ); // wp-content/plugins/
 require_once($plugin_dir.'WPNonce/WPNonce.php'); 

While using plugin_dir_path(), keep in mind that the “plugin” part of the name is misleading – it can be used for any file, and will not return the directory of a plugin unless you call it within a file in the plugin’s base directory.

or alternatively, you can also use WordPress constant WP_PLUGIN_DIR

 require_once(WP_PLUGIN_DIR.'/WPNonce/WPNonce.php'); 

I hope this helps.