All Credit to the following post goes to Abid Omar. The full tutorial can be found on Tuts+: A Guide to the WordPress HTTP API: Automatic Plugin Updates View Plugin On Github The gist is to create a new class which will post an external file ( API ) and return plugin to download if … Read more
I pretty sure this filter lets you add an array of variables. I’ve not tested this: function add_custom_query_vars( $vars ){ $vars[] = “variable1”; $vars[] = “variable2”; $vars[] = “variable3”; //… etc return $vars; } add_filter( ‘query_vars’, ‘add_custom_query_vars’ ); Or another way of doing it would be to do this: function add_custom_query_vars( $vars ){ array_push($vars, “variable1”, … Read more
If you dont want ‘TopLevel’ menu to represent a custom page you can use: add_menu_page( ‘TopLevel’, ‘TopLevel’, ‘MENU_CAP_LVL’, ‘MENU_SLUG’, ‘MENU_CB’ ); add_submenu_page( ‘MENU_SLUG’, ‘SubMenu’, ‘SubMenu’, ‘MENU_CAP_LVL’, ‘SUB_MENU_SLUG’, ‘SUB_MENU_CB’ ); add_submenu_page( ‘MENU_SLUG’, ‘SubMenu-A’, ‘SubMenu-A’, ‘MENU_CAP_LVL’, ‘SUB_MENU_A_SLUG’, ‘SUB_MENU_A_CB’ ); remove_submenu_page(‘MENU_SLUG’,’MENU_SLUG’); In this way click on “TopMenu” will forward to the 1st “SubMenu” and prevent “TopLevel” from being … Read more
Code in functions.php and plugins works in almost exactly same way (except than stage at which it is loaded and some plugin-specific hooks). Basically you just take your code out of functions.php, place it in plugin and it still works. It is good practice to use naming conventions and checking for functions definitions so it … Read more
I personally just add a menu link and in the function for it handle the form. With $_SERVER[‘REQUEST_URI’] as the action. Example below. add_action(“admin_menu”, “menu” ); function menu(){ add_menu_page(‘Test form’, ‘Test form’, ‘manage_options’, ‘show_form’ ); } function show_form(){ if ( $_SERVER[“REQUEST_METHOD”] == “POST” ){ print “do stuff”; } else { ?><form method=”post” action=”<?php echo $_SERVER[‘REQUEST_URI’]; … Read more
Try esc_html( $string ) (Codex ref), which among other things encodes single- and double-quotes. For further reference, see the Data Validation entry in the Codex.
There’s certainly no need to name plugin files with prefixes (although some plugin authors like to do this). I suspect the advice you read was referring to functions within your plugin files. Structuring you plugin folders as you suggest (using a class folder) is fine. See this link for more information on writing plugins: http://codex.wordpress.org/Writing_a_Plugin … Read more
Strictly from a MySQL Point-of-View SHORT VERSION MyISAM Storage Engine Table locks Writes are first come, first serve Reads slow down writes from initiating InnoDB Storage Engine Row locks Transactions (non blocking) Deadlock may occur when updating indexes LONG VERSION If the underlying tables use the MyISAM Storage Engine, row locks are not possible. Each … Read more
Register an activation hook and then redirect the user’s browser when you’re done installing your plugin. function myplugin_activate() { // TODO: Install your plugin here. // I don’t know of any other redirect function, so this’ll have to do. wp_redirect(admin_url(‘options-general.php?page=myplugin_settings’)); // You could use a header(sprintf(‘Location: %s’, admin_url(…)); here instead too. } register_activation_hook(__FILE__, ‘myplugin_activate’);
There is no built-in autoloader in WordPress. But other plugins or a theme might have registered an autoloader, and depending on the order of execution these are called earlier or later than yours. Update 21. 08. 2014 This answer is no longer what I would recommend. Do use an autoloader if you need one. The … Read more