Title: Plugin not working! Last modified: August 31, 2016 --- # Plugin not working! * [Fahad Alduraibi](https://wordpress.org/support/users/fduraibi/) * (@fduraibi) * [10 years, 2 months ago](https://wordpress.org/support/topic/plugin-not-working-377/) * I am testing the plug in on a fresh blog, (no other plugins and default everything) WP v. 4.4.2. * I added two languages Arabic and English * The html tag without the plugin looks like this: `` * But after enabling the plugin it becomes: `` * This happenes on the front page and also single posts regardless if a language is chosen or not. * [https://wordpress.org/plugins/language-field/](https://wordpress.org/plugins/language-field/) Viewing 5 replies - 1 through 5 (of 5 total) * Thread Starter [Fahad Alduraibi](https://wordpress.org/support/users/fduraibi/) * (@fduraibi) * [10 years, 2 months ago](https://wordpress.org/support/topic/plugin-not-working-377/#post-7233200) * I get these errors from php: * ``` Undefined index: lang in /var/www/html/wordpress/wp-content/plugins/language-field/lf_core_functions.php Undefined variable: thePostID in /var/www/html/wordpress/wp-content/plugins/language-field/lf_core_functions.php ``` * Might be the reason behind it not working. * Thread Starter [Fahad Alduraibi](https://wordpress.org/support/users/fduraibi/) * (@fduraibi) * [10 years, 2 months ago](https://wordpress.org/support/topic/plugin-not-working-377/#post-7233202) * The problem is with thePostID * It is defined as `the_Post_ID` but then used as `thePostID` * Here is the original code: * ``` $the_Post_ID = $wp_query->post->ID; $lf_language_code = get_post_meta( $thePostID, '_lf_language_code', true); ``` * The fix: * ``` $the_Post_ID = $wp_query->post->ID; $lf_language_code = get_post_meta( $the_Post_ID, '_lf_language_code', true); ``` * But the other error is still not resolved. * Thread Starter [Fahad Alduraibi](https://wordpress.org/support/users/fduraibi/) * (@fduraibi) * [10 years, 2 months ago](https://wordpress.org/support/topic/plugin-not-working-377/#post-7233207) * There are so many issues with your plugin, also the code is not following a standard indentation. * ``` Notice: Use of undefined constant addlflang - assumed 'addlflang' in /var/www/html/wordpress/wp-content/plugins/language-field/lf_admin_page.php on line 10 Notice: Use of undefined constant reset - assumed 'reset' in /var/www/html/wordpress/wp-content/plugins/language-field/lf_admin_page.php on line 12 Notice: Undefined index: reset in /var/www/html/wordpress/wp-content/plugins/language-field/lf_admin_page.php on line 12 ``` * Thread Starter [Fahad Alduraibi](https://wordpress.org/support/users/fduraibi/) * (@fduraibi) * [10 years, 2 months ago](https://wordpress.org/support/topic/plugin-not-working-377/#post-7233215) * The solution for the `undefined constant` is to quote the array keys as follow: * ``` if(isset($_POST['addlflang'])) { ``` * and * ``` } else if($_GET['reset']==1) { ``` * Thread Starter [Fahad Alduraibi](https://wordpress.org/support/users/fduraibi/) * (@fduraibi) * [10 years, 2 months ago](https://wordpress.org/support/topic/plugin-not-working-377/#post-7233221) * Solution for `undefined index` do this: * ``` else if( (isset($_GET['reset']) ? $_GET['reset'] : '')==1 ) { ``` Viewing 5 replies - 1 through 5 (of 5 total) The topic ‘Plugin not working!’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/language-field_dcdcdc.svg) * [Language Field](https://wordpress.org/plugins/language-field/) * [Frequently Asked Questions](https://wordpress.org/plugins/language-field/#faq) * [Support Threads](https://wordpress.org/support/plugin/language-field/) * [Active Topics](https://wordpress.org/support/plugin/language-field/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/language-field/unresolved/) * [Reviews](https://wordpress.org/support/plugin/language-field/reviews/) * 5 replies * 1 participant * Last reply from: [Fahad Alduraibi](https://wordpress.org/support/users/fduraibi/) * Last activity: [10 years, 2 months ago](https://wordpress.org/support/topic/plugin-not-working-377/#post-7233221) * Status: not resolved