| 1 | <?php |
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| 2 | /* |
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| 3 | Plugin Name: Fun with Uninstallation |
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| 4 | Plugin URI: http://www.wp-fun.co.uk/2008/01/09/fun-with-uninstallation/ |
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| 5 | Description: Adds an uninstall hook |
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| 6 | Author: Andrew Rickmann |
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| 7 | Version: 0.2 |
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| 8 | Author URI: http://www.wp-fun.co.uk |
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| 9 | Generated At: www.wp-fun.co.uk; |
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| 10 | */ |
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| 11 | |
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| 12 | if (!class_exists('fw_uninstallation')) { |
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| 13 | class fw_uninstallation { |
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| 14 | |
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| 15 | |
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| 16 | /** |
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| 17 | * PHP 4 Compatible Constructor |
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| 18 | */ |
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| 19 | function fw_uninstallation(){$this->__construct();} |
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| 20 | |
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| 21 | /** |
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| 22 | * PHP 5 Constructor |
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| 23 | */ |
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| 24 | function __construct(){ |
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| 25 | |
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| 26 | register_activation_hook( __FILE__ , array( &$this , "install" )); |
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| 27 | add_action('after_plugin_row', array(&$this,'after_plugin_row_intercept')); |
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| 28 | add_action('load-plugins.php', array(&$this,'load_plugins_intercept')); |
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| 29 | |
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| 30 | } |
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| 31 | |
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| 32 | /** |
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| 33 | * Makes sure the option is an array on activation |
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| 34 | */ |
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| 35 | function install(){ |
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| 36 | $uninstallable_plugins = get_option( 'uninstallable_plugins' ); |
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| 37 | if ( !is_array( $uninstallable_plugins ) ) { |
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| 38 | update_option( 'uninstallable_plugins' , array() ); |
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| 39 | } |
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| 40 | } |
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| 41 | |
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| 42 | /** |
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| 43 | * Checks that the plugin is in a state to be uninstalled, and calls the action to do so |
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| 44 | */ |
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| 45 | function load_plugins_intercept(){ |
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| 46 | |
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| 47 | if ( isset($_GET['action']) ) { |
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| 48 | if ('uninstall' == $_GET['action']) { |
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| 49 | check_admin_referer('uninstall-plugin_' . $_GET['plugin']); |
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| 50 | $current = get_option('active_plugins'); |
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| 51 | $uninstallable_plugins = get_option( 'uninstallable_plugins' ); |
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| 52 | $plugin = trim($_GET['plugin']); |
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| 53 | if ( validate_file($plugin) ) |
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| 54 | wp_die(__('Invalid plugin.')); |
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| 55 | if ( ! file_exists(ABSPATH . PLUGINDIR . '/' . $plugin) ) |
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| 56 | wp_die(__('Plugin file does not exist.')); |
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| 57 | if ( !in_array($plugin, $current )) { |
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| 58 | foreach( $uninstallable_plugins as $uninstallable_plugin ) { |
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| 59 | if ( $plugin == $uninstallable_plugin[1] ) { |
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| 60 | //include the plugin |
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| 61 | include_once( ABSPATH . PLUGINDIR . '/' . $plugin ); |
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| 62 | |
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| 63 | //do the action |
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| 64 | add_action( 'uninstall_plugin_' . $plugin , $uninstallable_plugin[2] ); |
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| 65 | do_action( 'uninstall_plugin_' . $plugin ); |
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| 66 | |
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| 67 | //remove it from the uninstall list |
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| 68 | unregister_uninstall_hook( $uninstallable_plugin[0] ); |
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| 69 | } |
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| 70 | } |
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| 71 | |
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| 72 | } |
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| 73 | |
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| 74 | wp_redirect('plugins.php?uninstalled=true'); |
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| 75 | } |
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| 76 | } |
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| 77 | |
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| 78 | //uninstalled message |
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| 79 | if ( isset($_GET['uninstalled']) ) { |
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| 80 | //start the page earlier than anticpated |
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| 81 | require_once('admin.php'); |
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| 82 | $title = __('Manage Plugins'); |
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| 83 | //includes required for the menu to work properly |
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| 84 | global $parent_file; |
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| 85 | global $menu; |
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| 86 | global $submenu; |
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| 87 | global $pagenow; |
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| 88 | global $plugin_page; |
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| 89 | global $_wp_real_parent_file; |
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| 90 | global $_wp_menu_nopriv; |
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| 91 | global $_wp_submenu_nopriv; |
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| 92 | require_once('admin-header.php'); |
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| 93 | if ('true' == $_GET['uninstalled']) { |
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| 94 | ?><div id="message" class="updated fade"><p><?php _e('Plugin <strong>Uninstalled</strong>.') ?></p></div><?php } else { |
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| 95 | ?><div id="message" class="updated fade"><p><?php _e('<strong>Error</strong> The plugin could not be uninstalled.') ?></p></div><?php |
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| 96 | } |
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| 97 | } |
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| 98 | |
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| 99 | } |
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| 100 | |
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| 101 | /** |
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| 102 | * Called by the filter the_content |
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| 103 | */ |
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| 104 | function after_plugin_row_intercept($plugin_file){ |
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| 105 | global $current_plugins; |
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| 106 | if ( !in_array($plugin_file, $current_plugins) && is_uninstallable( $plugin_file ) ) { |
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| 107 | $plugin_data = get_plugin_data( ABSPATH . PLUGINDIR . '/' . $plugin_file ); |
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| 108 | $toggle = "<a href='" . wp_nonce_url("plugins.php?action=uninstall&plugin=$plugin_file", 'uninstall-plugin_' . $plugin_file) . "' title='".__('Uninstall this plugin')."' class='delete'><strong>".__("Uninstall all the options and settings (including database tables ) relating to ").$plugin_data['Name']."</strong></a>"; |
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| 109 | ?> |
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| 110 | <tr> |
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| 111 | <td colspan="5" style="border-top:1px solid #ccc; border-bottom:1px solid #ccc; background-color:#F9B7E0"><?php echo $toggle; ?></td> |
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| 112 | </tr> |
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| 113 | <?php |
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| 114 | } |
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| 115 | } |
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| 116 | |
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| 117 | |
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| 118 | |
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| 119 | } |
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| 120 | } |
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| 121 | |
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| 122 | //instantiate the class |
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| 123 | if (class_exists('fw_uninstallation')) { |
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| 124 | $fw_uninstallation = new fw_uninstallation(); |
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| 125 | |
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| 126 | function register_uninstall_hook( $name , $plugin_file , $function ){ |
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| 127 | |
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| 128 | $uninstallable_plugins = get_option( 'uninstallable_plugins' ); |
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| 129 | $plugin = trim( plugin_basename( $plugin_file ) ); |
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| 130 | if ( file_exists( ABSPATH . PLUGINDIR . '/' . $plugin ) ){ |
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| 131 | $uninstallable_plugins[$name] = array( $name , $plugin , $function ); |
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| 132 | } |
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| 133 | |
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| 134 | update_option( 'uninstallable_plugins' , $uninstallable_plugins ); |
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| 135 | |
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| 136 | } |
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| 137 | |
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| 138 | function unregister_uninstall_hook( $name ) { |
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| 139 | $uninstallable_plugins = get_option( 'uninstallable_plugins' ); |
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| 140 | if ( isset( $uninstallable_plugins[$name] ) ) { |
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| 141 | unset( $uninstallable_plugins[$name] ); |
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| 142 | update_option( 'uninstallable_plugins' , $uninstallable_plugins ); |
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| 143 | } |
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| 144 | } |
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| 145 | |
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| 146 | function is_plugin_active( $plugin_file ){ |
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| 147 | $plugin = trim( plugin_basename( $plugin_file ) ); |
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| 148 | |
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| 149 | //check if being activated |
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| 150 | if ( isset($_GET['action']) ) { |
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| 151 | if ('activate' == $_GET['action']) { |
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| 152 | if ( isset( $_GET['plugin'] ) && $plugin == trim($_GET['plugin']) ) { return true; } |
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| 153 | } |
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| 154 | } |
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| 155 | |
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| 156 | //if not then we continue and check if active |
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| 157 | $current = get_option('active_plugins'); |
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| 158 | if ( in_array( $plugin , $current ) ) { |
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| 159 | return true; |
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| 160 | } else { |
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| 161 | return false; |
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| 162 | } |
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| 163 | |
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| 164 | } |
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| 165 | |
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| 166 | function is_uninstallable( $plugin_file ){ |
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| 167 | |
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| 168 | $uninstallable_plugins = get_option( 'uninstallable_plugins' ); |
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| 169 | $plugin = trim( $plugin_file ); |
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| 170 | foreach($uninstallable_plugins as $uninstallable_plugin) { |
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| 171 | if ( $plugin == $uninstallable_plugin[1] ) { |
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| 172 | return true; |
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| 173 | } |
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| 174 | } |
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| 175 | return false; |
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| 176 | } |
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| 177 | |
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| 178 | |
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| 179 | } |
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| 180 | |
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| 181 | |
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| 182 | |
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| 183 | |
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| 184 | ?> |
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