Changeset 16904 for trunk/wp-includes/functions.php

Timestamp:

12/14/2010 08:31:33 AM (15 years ago)

Author:

dd32

Message:

Fix fatal error on IIS after r16797. props peaceablewhale. Limit variable string searching when possible. See #10187

File:

• trunk/wp-includes/functions.php (modified) (1 diff)

trunk/wp-includes/functions.php

@@ -3423 +3423 @@
 
 /**
+ * Check if IIS 7 supports pretty permalinks
+ *
+ * @since 2.8.0
+ *
+ * @return bool
+ */
+function iis7_supports_permalinks() {
+    global $is_iis7;
+
+    $supports_permalinks = false;
+    if ( $is_iis7 ) {
+        /* First we check if the DOMDocument class exists. If it does not exist,
+         * which is the case for PHP 4.X, then we cannot easily update the xml configuration file,
+         * hence we just bail out and tell user that pretty permalinks cannot be used.
+         * This is not a big issue because PHP 4.X is going to be depricated and for IIS it
+         * is recommended to use PHP 5.X NTS.
+         * Next we check if the URL Rewrite Module 1.1 is loaded and enabled for the web site. When
+         * URL Rewrite 1.1 is loaded it always sets a server variable called 'IIS_UrlRewriteModule'.
+         * Lastly we make sure that PHP is running via FastCGI. This is important because if it runs
+         * via ISAPI then pretty permalinks will not work.
+         */
+        $supports_permalinks = class_exists('DOMDocument') && isset($_SERVER['IIS_UrlRewriteModule']) && ( php_sapi_name() == 'cgi-fcgi' );
+    }
+
+    return apply_filters('iis7_supports_permalinks', $supports_permalinks);
+}
+
+/**
  * File validates against allowed set of defined rules.
  *