| 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/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: 0.1 |
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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(){$this->__construct();} |
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| 20 | |
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| 21 | /** |
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| 22 | * PHP 5 Constructor |
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| 23 | */ |
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| 24 | function __construct(){ |
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| 25 | |
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| 26 | |
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| 27 | add_action('after_plugin_row', array(&$this,'after_plugin_row_intercept')); |
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| 28 | add_action('load-plugins.php', array(&$this,'load_plugins_intercept')); |
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| 29 | |
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| 30 | |
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| 31 | } |
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| 32 | |
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| 33 | |
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| 34 | /** |
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| 35 | * Checks that the plugin is in a state to be uninstalled, and calls the action to do so |
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| 36 | */ |
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| 37 | function load_plugins_intercept(){ |
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| 38 | |
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| 39 | if ( isset($_GET['action']) ) { |
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| 40 | if ('uninstall' == $_GET['action']) { |
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| 41 | check_admin_referer('uninstall-plugin_' . $_GET['plugin']); |
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| 42 | $current = get_option('active_plugins'); |
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| 43 | $plugin = trim($_GET['plugin']); |
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| 44 | if ( validate_file($plugin) ) |
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| 45 | wp_die(__('Invalid plugin.')); |
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| 46 | if ( ! file_exists(ABSPATH . PLUGINDIR . '/' . $plugin) ) |
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| 47 | wp_die(__('Plugin file does not exist.')); |
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| 48 | if ( !in_array($plugin, $current )) { |
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| 49 | if ( $uninstaller = $this->check_uninstall_file( $plugin ) ) { |
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| 50 | @include( $uninstaller ); |
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| 51 | } |
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| 52 | } |
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| 53 | |
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| 54 | wp_redirect('plugins.php?uninstalled=true'); |
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| 55 | } |
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| 56 | } |
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| 57 | |
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| 58 | //uninstalled message |
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| 59 | if ( isset($_GET['uninstalled']) ) { |
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| 60 | //start the page earlier than anticpated |
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| 61 | require_once('admin.php'); |
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| 62 | $title = __('Manage Plugins'); |
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| 63 | //includes required for the menu to work properly |
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| 64 | global $parent_file; |
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| 65 | global $menu; |
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| 66 | global $submenu; |
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| 67 | global $pagenow; |
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| 68 | global $plugin_page; |
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| 69 | global $_wp_real_parent_file; |
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| 70 | global $_wp_menu_nopriv; |
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| 71 | global $_wp_submenu_nopriv; |
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| 72 | require_once('admin-header.php'); |
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| 73 | if ('true' == $_GET['uninstalled']) { |
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| 74 | ?><div id="message" class="updated fade"><p><?php _e('Plugin <strong>Uninstalled</strong>.') ?></p></div><?php } else { |
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| 75 | ?><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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| 76 | } |
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| 77 | } |
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| 78 | |
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| 79 | } |
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| 80 | |
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| 81 | /** |
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| 82 | * checks for the existence of an uninstall file and returns it's name |
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| 83 | */ |
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| 84 | function check_uninstall_file( $plugin ){ |
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| 85 | |
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| 86 | $plugin_file = ABSPATH . PLUGINDIR . '/' .$plugin; |
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| 87 | $file_name = str_replace( '.php' , '_uninstaller.php' , $plugin_file ); |
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| 88 | return ( file_exists( $file_name ) ) ? $file_name : false ; |
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| 89 | |
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| 90 | } |
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| 91 | |
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| 92 | |
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| 93 | /** |
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| 94 | * Called by the filter the_content |
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| 95 | */ |
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| 96 | function after_plugin_row_intercept($plugin_file){ |
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| 97 | global $current_plugins; |
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| 98 | if ( !in_array($plugin_file, $current_plugins) && $this->check_uninstall_file( $plugin_file ) ) { |
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| 99 | $toggle = "<a href='" . wp_nonce_url("plugins.php?action=uninstall&plugin=$plugin_file", 'uninstall-plugin_' . $plugin_file) . "' title='".__('Uninstall this plugin')."' class='delete'><strong>".__("Uninstall all the options and settings (including database tables ) relating to this plugin")."</strong></a>"; |
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| 100 | ?> |
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| 101 | <tr> |
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| 102 | <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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| 103 | </tr> |
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| 104 | <?php |
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| 105 | } |
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| 106 | } |
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| 107 | |
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| 108 | |
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| 109 | |
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| 110 | } |
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| 111 | } |
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| 112 | |
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| 113 | //instantiate the class |
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| 114 | if (class_exists('fw_uninstallation')) { |
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| 115 | $fw_uninstallation = new fw_uninstallation(); |
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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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