Experte gefragt -Trotz Admin keine Rechte mehr bei Plugins

<?php
require_once('admin.php');


if ( isset($_GET['action']) ) {
    if ('activate' == $_GET['action']) {
        check_admin_referer('activate-plugin_' . $_GET['plugin']);
        $current = get_option('active_plugins');
        $plugin = trim($_GET['plugin']);
        if ( validate_file($plugin) )
            wp_die(__('Invalid plugin.'));
        if ( ! file_exists(ABSPATH . PLUGINDIR . '/' . $plugin) )
            wp_die(__('Plugin file does not exist.'));
        if (!in_array($plugin, $current)) {
            wp_redirect('plugins.php?error=true'); // we'll override this later if the plugin can be included without fatal error
            ob_start();
            @include(ABSPATH . PLUGINDIR . '/' . $plugin);
            $current[] = $plugin;
            sort($current);
            update_option('active_plugins', $current);
            do_action('activate_' . $plugin);
            ob_end_clean();
        }
        wp_redirect('plugins.php?activate=true'); // overrides the ?error=true one above
    } else if ('deactivate' == $_GET['action']) {
        check_admin_referer('deactivate-plugin_' . $_GET['plugin']);
        $current = get_option('active_plugins');
        array_splice($current, array_search( $_GET['plugin'], $current), 1 ); // Array-fu!
        update_option('active_plugins', $current);
        do_action('deactivate_' . trim( $_GET['plugin'] ));
        wp_redirect('plugins.php?deactivate=true');
    } elseif ($_GET['action'] == 'deactivate-all') {
        check_admin_referer('deactivate-all');
        $current = get_option('active_plugins');
        
        foreach ($current as $plugin) {
            array_splice($current, array_search($plugin, $current), 1);
            do_action('deactivate_' . $plugin);
        }
        
        update_option('active_plugins', array());
        wp_redirect('plugins.php?deactivate-all=true');
    }
    exit;
}


$title = __('Manage Plugins');
require_once('admin-header.php');


// Clean up options
// If any plugins don't exist, axe 'em


$check_plugins = get_option('active_plugins');


// Sanity check.  If the active plugin list is not an array, make it an
// empty array.
if ( !is_array($check_plugins) ) {
    $check_plugins = array();
    update_option('active_plugins', $check_plugins);
}


// If a plugin file does not exist, remove it from the list of active
// plugins.
foreach ($check_plugins as $check_plugin) {
    if (!file_exists(ABSPATH . PLUGINDIR . '/' . $check_plugin)) {
            $current = get_option('active_plugins');
            $key = array_search($check_plugin, $current);
            if ( false !== $key && NULL !== $key ) {
                unset($current[$key]);
                update_option('active_plugins', $current);
            }
    }
}
?>


<?php if ( isset($_GET['error']) ) : ?>
    <div id="message" class="updated fade"><p><?php _e('Plugin could not be activated because it triggered a <strong>fatal error</strong>.') ?></p></div>
<?php elseif ( isset($_GET['activate']) ) : ?>
    <div id="message" class="updated fade"><p><?php _e('Plugin <strong>activated</strong>.') ?></p></div>
<?php elseif ( isset($_GET['deactivate']) ) : ?>
    <div id="message" class="updated fade"><p><?php _e('Plugin <strong>deactivated</strong>.') ?></p></div>
<?php elseif (isset($_GET['deactivate-all'])) : ?>
    <div id="message" class="updated fade"><p><?php _e('All plugins <strong>deactivated</strong>.'); ?></p></div>
<?php endif; ?>


<div class="wrap">
<h2><?php _e('Plugin Management'); ?></h2>
<p><?php _e('Plugins extend and expand the functionality of WordPress. Once a plugin is installed, you may activate it or deactivate it here.'); ?></p>
<?php


if ( get_option('active_plugins') )
    $current_plugins = get_option('active_plugins');


$plugins = get_plugins();


if (empty($plugins)) {
    echo '<p>';
    _e("Couldn’t open plugins directory or there are no plugins available."); // TODO: make more helpful
    echo '</p>';
} else {
?>
<table class="widefat plugins">
    <thead>
    <tr>
        <th><?php _e('Plugin'); ?></th>
        <th style="text-align: center"><?php _e('Version'); ?></th>
        <th><?php _e('Description'); ?></th>
        <th style="text-align: center"<?php if ( current_user_can('edit_plugins') ) echo ' colspan="2"'; ?>><?php _e('Action'); ?></th>
    </tr>
    </thead>
<?php
    $style = '';


    foreach($plugins as $plugin_file => $plugin_data) {
        $style = ('class="alternate"' == $style|| 'class="alternate active"' == $style) ? '' : 'alternate';


        if (!empty($current_plugins) && in_array($plugin_file, $current_plugins)) {
            $toggle = "<a href='" . wp_nonce_url("plugins.php?action=deactivate&amp;plugin=$plugin_file", 'deactivate-plugin_' . $plugin_file) . "' title='".__('Deactivate this plugin')."' class='delete'>".__('Deactivate')."</a>";
            $plugin_data['Title'] = "<strong>{$plugin_data['Title']}</strong>";
            $style .= $style == 'alternate' ? ' active' : 'active';
        } else {
            $toggle = "<a href='" . wp_nonce_url("plugins.php?action=activate&amp;plugin=$plugin_file", 'activate-plugin_' . $plugin_file) . "' title='".__('Activate this plugin')."' class='edit'>".__('Activate')."</a>";
        }


        $plugins_allowedtags = array('a' => array('href' => array(),'title' => array()),'abbr' => array('title' => array()),'acronym' => array('title' => array()),'code' => array(),'em' => array(),'strong' => array());


        // Sanitize all displayed data
        $plugin_data['Title']       = wp_kses($plugin_data['Title'], $plugins_allowedtags);
        $plugin_data['Version']     = wp_kses($plugin_data['Version'], $plugins_allowedtags);
        $plugin_data['Description'] = wp_kses($plugin_data['Description'], $plugins_allowedtags);
        $plugin_data['Author']      = wp_kses($plugin_data['Author'], $plugins_allowedtags);


        if ( $style != '' )
            $style = 'class="' . $style . '"';
        if ( is_writable(ABSPATH . PLUGINDIR . '/' . $plugin_file) )
            $edit = "<a href='plugin-editor.php?file=$plugin_file' title='".__('Open this file in the Plugin Editor')."' class='edit'>".__('Edit')."</a>";
        else
            $edit = '';


        echo "
    <tr $style>
        <td class='name'>{$plugin_data['Title']}</td>
        <td class='vers'>{$plugin_data['Version']}</td>
        <td class='desc'><p>{$plugin_data['Description']} <cite>".sprintf(__('By %s'), $plugin_data['Author']).".</cite></p></td>
        <td class='togl'>$toggle</td>";
        if ( current_user_can('edit_plugins') )
        echo "
        <td>$edit</td>";
        echo"
    </tr>";
    }
?>


<tr>
    <td colspan="3">&nbsp;</td>
    <td colspan="2" style="width:12em;"><a href="<?php echo wp_nonce_url('plugins.php?action=deactivate-all', 'deactivate-all'); ?>" class="delete"><?php _e('Deactivate All Plugins'); ?></a></td>
</tr>


</table>
<?php
}
?>


<p><?php printf(__('If something goes wrong with a plugin and you can’t use WordPress, delete or rename that file in the <code>%s</code> directory and it will be automatically deactivated.'), PLUGINDIR); ?></p>


<h2><?php _e('Get More Plugins'); ?></h2>
<p><?php _e('You can find additional plugins for your site in the <a href="http://wordpress.org/extend/plugins/">WordPress plugin directory</a>.'); ?></p>
<p><?php printf(__('To install a plugin you generally just need to upload the plugin file into your <code>%s</code> directory. Once a plugin is uploaded, you may activate it here.'), PLUGINDIR); ?></p>


</div>


<?php
include('admin-footer.php');
?>