Ticket #12089: 12089.diff

includes/plugin.php

@@ -359 +359 @@
                         wp_redirect(add_query_arg('_error_nonce', wp_create_nonce('plugin-activation-error_' . $plugin), $redirect)); // we'll override this later if the plugin can be included without fatal error
                 ob_start();
                 @include(WP_PLUGIN_DIR . '/' . $plugin);
+                if ( ob_get_length() > 0 ) {
+                        $output = ob_get_clean();
+                        return new WP_Error('unexpected_output', __('The plugin generated unexpected output.'), $output);
+                }
                 do_action( 'activate_plugin', trim( $plugin) );
                 if ( $network_wide ) {
                         $current[$plugin] = time();

plugins.php

@@ -50 +50 @@
                         check_admin_referer('activate-plugin_' . $plugin);
 
                         $result = activate_plugin($plugin, 'plugins.php?error=true&plugin=' . $plugin, $network_wide);
-                        if ( is_wp_error( $result ) )
-                                wp_die($result);
+                        if ( is_wp_error( $result ) ) {
+                                if ('unexpected_output' == $result->get_error_code()) {
+                                        $redirect = 'plugins.php?error=true&charsout=' . strlen($result->get_error_data()) . '&plugin=' . $plugin;
+                                        wp_redirect(add_query_arg('_error_nonce', wp_create_nonce('plugin-activation-error_' . $plugin), $redirect));
+                                        exit;
+                                } else {
+                                        wp_die($result);
+                                }
+                        }
 
                         $recent = (array)get_option('recently_activated');
                         if ( isset($recent[ $plugin ]) ) {
@@ -157 +164 @@
                         check_admin_referer('deactivate-plugin_' . $plugin);
                         deactivate_plugins($plugin);
                         update_option('recently_activated', array($plugin => time()) + (array)get_option('recently_activated'));
-                        wp_redirect("plugins.php?deactivate=true&plugin_status=$status&paged=$page");
+                        if (headers_sent())
+                                echo "<meta http-equiv='refresh' content='0;url=plugins.php?deactivate=true&plugin_status=$status&paged=$page' />";
+                        else
+                                wp_redirect("plugins.php?deactivate=true&plugin_status=$status&paged=$page");
                         exit;
                         break;
                 case 'deactivate-selected':
@@ -302 +312 @@
                 echo '<div id="message" class="error"><p>' . sprintf(__('The plugin <code>%s</code> has been <strong>deactivated</strong> due to an error: %s'), esc_html($plugin_file), $error->get_error_message()) . '</p></div>';
 ?>
 
-<?php if ( isset($_GET['error']) ) : ?>
-        <div id="message" class="updated"><p><?php _e('Plugin could not be activated because it triggered a <strong>fatal error</strong>.') ?></p>
+<?php if ( isset($_GET['error']) ) :
+
+        if (isset($_GET['charsout']))
+                $errmsg = sprintf(__('Plugin could not be activated because it generated %d bytes of <strong>unexpected output</strong>.'), $_GET['charsout']);
+        else
+                $errmsg = __('Plugin could not be activated because it triggered a <strong>fatal error</strong>.');
+
+        ?>
+        <div id="message" class="updated"><p><?php echo $errmsg; ?></p>
         <?php
                 if ( wp_verify_nonce($_GET['_error_nonce'], 'plugin-activation-error_' . $plugin) ) { ?>
         <iframe style="border:0" width="100%" height="70px" src="<?php echo admin_url('plugins.php?action=error_scrape&amp;plugin=' . esc_attr($plugin) . '&amp;_wpnonce=' . esc_attr($_GET['_error_nonce'])); ?>"></iframe>