Fix router to properly set $_SERVER variables for entry points and pretty permalinks

features/server.feature

@@ -15,3 +15,24 @@ Feature: Serve WordPress locally
     When I run `curl -sS localhost:8181/license.txt > /tmp/license.txt`
     And I run `cmp /tmp/license.txt license.txt`
     Then STDOUT should be empty
+
+  Scenario: Access wp-login.php
+    Given a WP install
+    And I launch in the background `wp server --host=localhost --port=8182`
+
+    When I run `curl -sS http://localhost:8182/wp-login.php`
+    Then STDOUT should contain:
+      """
+      wp-login.php
+      """
+
+  Scenario: Pretty permalinks
+    Given a WP install
+    And I launch in the background `wp server --host=localhost --port=8183`
+    And I run `wp option update permalink_structure '/%postname%/'`
+
+    When I run `curl -sS http://localhost:8183/?p=1`
+    Then STDOUT should contain:
+      """
+      Hello world!
+      """

router.php

@@ -125,13 +125,24 @@ function ( $url ) {
 		exit;
 	}
 
-	if ( strpos( $wpcli_server_path, '.php' ) !== false ) {
+	// Check if this is a PHP file by examining the extension
+	if ( pathinfo( $wpcli_server_path, PATHINFO_EXTENSION ) === 'php' ) {
+		// Set $_SERVER variables to mimic direct access to the PHP file
+		$_SERVER['SCRIPT_NAME']     = $wpcli_server_path;
+		$_SERVER['PHP_SELF']        = $wpcli_server_path;
+		$_SERVER['SCRIPT_FILENAME'] = $wpcli_server_root . $wpcli_server_path;
+
 		chdir( dirname( $wpcli_server_root . $wpcli_server_path ) );
 		require_once $wpcli_server_root . $wpcli_server_path;
 	} else {
 		return false;
 	}
 } else {
+	// File doesn't exist - route to index.php for pretty permalinks
+	$_SERVER['SCRIPT_NAME']     = '/index.php';
+	$_SERVER['PHP_SELF']        = '/index.php';
+	$_SERVER['SCRIPT_FILENAME'] = $wpcli_server_root . '/index.php';
+
 	chdir( $wpcli_server_root );
 	require_once 'index.php';
 }