global $wpdb; $image_src = wp_upload_dir()[‘baseurl’] . “https://wordpress.stackexchange.com/” . _wp_relative_upload_path( $filename ); $query = “SELECT COUNT(*) FROM {$wpdb->posts} WHERE guid=’$image_src'”; $count = intval($wpdb->get_var($query)); You can use this at the top of your code. Then check the value of $count. If it’s 0, then you can continue adding the attachment
You can use the theme_page_templates filter to add templates to the dropdown list of page templates like this: function wpse255804_add_page_template ($templates) { $templates[‘my-custom-template.php’] = ‘My Template’; return $templates; } add_filter (‘theme_page_templates’, ‘wpse255804_add_page_template’); Now WP will be searching for my-custom-template.php in the theme directory, so you will have to redirect that to your plugin directory by … Read more
More than an Answer, this is a research and a compilation. Database Description already in Damien answer. A Google search reveals this in WordPress forums: UML documentation of WordPress As far as I know, that’s all we have. If you want to write one, I’m sure it’d be welcomed 🙂 (Ipstenu, referring to the Database … Read more
Given that all of the libraries you need for the datepicker are bundled with WordPress and are registered with all of the appropriate dependencies, all you really need to do is: function enqueue_my_scripts_wpse_97533() { wp_enqueue_script(‘jquery-ui-datepicker’); } add_action(‘wp_enqueue_scripts’,’enqueue_my_scripts_wpse_97533′); If you then look at the source of the page you will see that jQuery, jQuery-UI, and jQuery-UI-Datepicker … Read more
The wp_capabilities saves the value as serilized array, you can try it in your php or for this example here: http://blog.tanist.co.uk/files/unserialize/. The Code: a:1:{s:13:”administrator”;b:1;} Is: Array ( [administrator] => 1 ) Meaning the user is an administrator. You can add new roles to the database by running the function add_role, and only run it once!
The file wp-admin/includes/plugin.php is not always included. You may have to do this in your plugin. And your Location header is invalid: You have to send a complete URL. You should use: require_once( ABSPATH . ‘wp-admin/includes/plugin.php’ ); When do you call this function? Maybe too early.
Thanks Chip (excellent Settings API tutorial) and t31os (great snippet of code for quick testing) for both your suggestions. I did some further digging and found that the default messages can indeed be displayed if I hook into any menu but only if the function settings_errors() is called. For example, modifying t31os code as follows: … Read more
Custom collection in media manager?
https://github.com/scribu/wp-scb-framework/wiki This guy has built what you are looking for I believe. He’s a core-contributor and his code is top notch. And the project is open on github, so even better right?
You can use the WordPres Plugin Directory Slurper shell script by Mark Jaquith to download the the most recent version of all plugins from the WordPress.org repo. Once the plugins have been downloaded, you can grep for the plugin/hook prefix you want to check, e.g.: grep -r –include=*.php ‘wpseo_’ ./ Unzip the WordPres Plugin Directory … Read more