plugin-development - Read For Learn

My plugin creates custom widgets, How can I programatically add them to existing sidebar widget areas?

Sidebars are registered in the option ‘sidebars_widgets’. To see what’s in and what not, try this: add_action( ‘wp_footer’, ‘show_my_sidebars’ ); function show_my_sidebars() { $sw = get_option( ‘sidebars_widgets’ ); print ‘<pre>’ . htmlspecialchars( print_r( $sw, TRUE ) ) . ‘</pre>’; } Sample output: Array ( [sidebar-footer-left] => Array ( [0] => archives-3 ) [sidebar-footer-right] => Array … Read more

Create a Plugin to Download Files from Web to Server

Ehm… You are writing the plugin or thinking about it? Could you show us some stuff that you already did? You should check the permissions on the server where you want to upload the files. Then – in case – change chmod, upload and then change chmod back for sec. reasons. Maybe the update class … Read more

Can one plugin activate another plugin via script?

Take a look at function activate_plugin( $plugin, $redirect=””, $network_wide = false, $silent = false ); in wp-admin/includes/plugin.php

Set page to draft on plugin deactivation

I’m posting this as another solution for you and its based on the page id /* $post_id – The ID of the post you’d like to change. $status – The post status publish|pending|draft|private|static|object|attachment|inherit|future|trash. */ function change_post_status($post_id,$status){ $current_post = get_post( $post_id, ‘ARRAY_A’ ); $current_post[‘post_status’] = $status; return wp_update_post($current_post); } So once you have this function you … Read more

Is it possible for two WordPress plugins to share the same code base?

Yes, you can easily set up plugins that share a code base. If you make use of global variables and constants, you will be able to read data stored in one plugin by the other. Also, remember that any function registered in one plugin, will be available to all other plugins (unless they’re private class … Read more

How to Show Category List With Corresponding Links?

In the category link URL, add he category ID. Then when you click the link, the page reads the $_GET variable and use this to fetch posts with that category. You can use get_posts.

How to properly create table in plugin

I see two problems- $this->table_name = $wpdb->prefix . “b99_pf”; $sql = “CREATE TABLE ” . $table_name . ” ( $table_name will be undefined, should be $this->table_name and in your query: cat tinytext default NOT NULL I don’t think it’ll like that default in there. EDIT – to answer your debug question- xdebug, xdebug and netbeans

can’t access some WordPress function from my plugin

First, since the if (!function_exists(‘check_admin_referer’)) echo “<h1>check_admin_referer not found</h1>”; code is working, then you’ve eliminated the issue being proper including of your Plugin sub-file. Second, all four of those functions are core WordPress functions, so you should never get a call to undefined function error for any of them. Can you post your relevant Plugin … Read more

Decontruct serialized data array from wp_options

You can’t use it as-is because it will get double-serialized. So as per comment you unserialize it first and it will get serialized back when saved into option. $array = unserialize( $stuff ); update_option(‘my_options’, $array);

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