Add stripos() for compatibility for PHP < 5. This will be needed for a patch later, I think.

git-svn-id: http://svn.automattic.com/wordpress/trunk@5187 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/compat.php

@@ -118,4 +118,11 @@ if ( !function_exists('_') ) {
 	}
 }
 
+// Added in PHP 5.0
+if (!function_exists('stripos')) {
+	function stripos($haystack, $needle, $offset = 0) {
+		return strpos(strtolower($haystack), strtolower($needle), $offset);
+	}
+}
+
 ?>