php-src/ext/session/tests/skipif.inc

<?php
// This script prints "skip" if condition does not meet.
if (!extension_loaded("session")) {
  $dlext = (substr(PHP_OS, 0, 3) == "WIN") ? ".dll" : ".so";
  @dl("session$dlext");
}
if (!extension_loaded("session")) {
    die("skip Session module not loaded");
}
$save_path = ini_get("session.save_path");
if ($save_path) {
	if (!file_exists($save_path)) {
		die("skip Session save_path doesn't exist");
	}

	if ($save_path && !@is_writable($save_path)) {
		if (($p = strpos($save_path, ';')) !== false) {
			$save_path = substr($save_path, ++$p);
		}
		if (!@is_writable($save_path)) {
			die("skip\n");
		}
	}
}
?>