egroupware/setup/check_install.php

<?php
  /**************************************************************************\
  * eGroupWare - Setup Check Installation                                    *
  * http://www.eGroupWare.org                                                *
  * --------------------------------------------                             *
  *  This program is free software; you can redistribute it and/or modify it *
  *  under the terms of the GNU General Public License as published by the   *
  *  Free Software Foundation; either version 2 of the License, or (at your  *
  *  option) any later version.                                              *
  \**************************************************************************/

  /* $Id$ */

	$run_by_webserver = !!$_SERVER['PHP_SELF'];
	$is_windows = strtoupper(substr(PHP_OS,0,3)) == 'WIN';

	if ($run_by_webserver)
	{
		$GLOBALS['egw_info'] = array(
			'flags' => array(
				'noheader' => True,
				'nonavbar' => True,
				'currentapp' => 'home',
				'noapi' => True
		));
		$safe_er = error_reporting();
		include ('./inc/functions.inc.php');
		error_reporting($safe_er);

		$GLOBALS['egw_info']['setup']['stage']['header'] = $GLOBALS['egw_setup']->detection->check_header();
		if ($GLOBALS['egw_info']['setup']['stage']['header'] == '10')
		{
			// Check header and authentication
			if (!$GLOBALS['egw_setup']->auth('Config') && !$GLOBALS['egw_setup']->auth('Header'))
			{
				Header('Location: index.php');
				exit;
			}
		}
		$passed_icon = '<img src="templates/default/images/completed.png" title="Passed" alt="Passed" align="middle" />';
		$error_icon = '<img src="templates/default/images/incomplete.png" title="Error" alt="Error" align="middle" />';
		$warning_icon = '<img src="templates/default/images/dep.png" title="Warning" alt="Warning" align="middle" />';
	}
	else
	{
		$passed_icon = '>>> Passed ';
		$error_icon = '*** Error: ';
		$warning_icon = '!!! Warning: ';

		function lang($msg,$arg1=NULL,$arg2=NULL,$arg3=NULL,$arg4=NULL)
		{
			return is_null($arg1) ? $msg : str_replace(array('%1','%2','%3','%4'),array($arg1,$arg2,$arg3,$arg4),$msg);
		}
	}
	$checks = array(
		'phpversion' => array(
			'func' => 'php_version',
			'value' => $GLOBALS['egw_setup']->required_php_version,
			'verbose_value' => $GLOBALS['egw_setup']->required_php_version.'+',
			'recommended' => $GLOBALS['egw_setup']->recommended_php_version,
		),
		'safe_mode' => array(
			'func' => 'php_ini_check',
			'value' => 0,
			'verbose_value' => 'Off',
			'warning' => lang('safe_mode is turned on, which is generaly a good thing as it makes your install more secure.')."\n".
				lang('If safe_mode is turned on, eGW is not able to change certain settings on runtime, nor can we load any not yet loaded module.')."\n".
				lang('*** You have to do the changes manualy in your php.ini (usualy in /etc on linux) in order to get eGW fully working !!!')."\n".
				lang('*** Do NOT update your database via setup, as the update might be interrupted by the max_execution_time, which leaves your DB in an unrecoverable state (your data is lost) !!!')
		),
		'magic_quotes_runtime' => array(
			'func' => 'php_ini_check',
			'value' => 0,
			'verbose_value' => 'Off',
			'safe_mode' => 'magic_quotes_runtime = Off'
		),
		'register_globals' => array(
			'func' => 'php_ini_check',
			'value' => 0,
			'verbose_value' => 'Off',
			'warning' => lang("register_globals is turned On, eGroupWare does NOT require it and it's generaly more secure to have it turned Off")
		),
		'display_errors' => array(
			'func' => 'php_ini_check',
			'value' => 0,
			'verbose_value' => 'Off',
			'warning' => lang('%1 is set to %2. This is NOT recommeded for a production system, as displayed error messages can contain passwords or other sensitive information!','display_errors',ini_get('display_errors')),
		),
		'memory_limit' => array(
			'func' => 'php_ini_check',
			'value' => '24M',
			'check' => '>=',
			'error' => lang('memory_limit is set to less than %1: some applications of eGroupWare need more than the recommend 8M, expect occasional failures','24M'),
			'change' => 'memory_limit = 24M'
		),
		'max_execution_time' => array(
			'func' => 'php_ini_check',
			'value' => 30,
			'check' => '>=',
			'error' => lang('max_execution_time is set to less than 30 (seconds): eGroupWare sometimes needs a higher execution_time, expect occasional failures'),
			'safe_mode' => 'max_execution_time = 30'
		),
		'file_uploads' => array(
			'func' => 'php_ini_check',
			'value' => 1,
			'verbose_value' => 'On',
			'error' => lang('File uploads are switched off: You can NOT use any of the filemanagers, nor can you attach files in several applications!'),
		),
		'upload_max_filesize' => array(
			'func' => 'php_ini_check',
			'value' => '8M',
			'check' => '>=',
			'error' => lang('%1 is set to %2, you will NOT be able to upload or attach files bigger then that!','upload_max_filesize',ini_get('upload_max_filesize')),
			'change' => 'upload_max_filesize = 8M'
		),
		'post_max_size' => array(
			'func' => 'php_ini_check',
			'value' => '8M',
			'check' => '>=',
			'error' => lang('%1 is set to %2, you will NOT be able to upload or attach files bigger then that!','post_max_size',ini_get('max_post_size')),
			'change' => 'post_max_size = 8M'
		),
		'session' => array(
			'func' => 'extension_check',
			'error' => lang('The session extension is required!')
		),
		'include_path' => array(
			'func' => 'php_ini_check',
			'value' => '.',
			'check' => 'contain',
			'error' => lang('include_path need to contain "." - the current directory'),
		),
		'pdo' => array(
			'func' => 'extension_check',
			'error' => lang('The PDO extension plus a database specific driver is needed by the VFS (virtual file system)!'),
		),
		'mysql' => array(
			'func' => 'extension_check',
			'warning' => lang('The %1 extension is needed, if you plan to use a %2 database.','mysql','MySQL')
		),
		'pdo_mysql' => array(
			'func' => 'extension_check',
			'warning' => lang('The %1 extension is needed, if you plan to use a %2 database.','pdo_mysql','MySQL')
		),
		'pgsql' => array(
			'func' => 'extension_check',
			'warning' => lang('The %1 extension is needed, if you plan to use a %2 database.','pgsql','pgSQL')
		),
		'pdo_pgsql' => array(
			'func' => 'extension_check',
			'warning' => lang('The %1 extension is needed, if you plan to use a %2 database.','pdo_pgsql','pgSQL')
		),
		'mssql' => array(
			'func' => 'extension_check',
			'warning' => lang('The %1 extension is needed, if you plan to use a %2 database.','mssql','MsSQL'),
			'win_only' => True
		),
		'pdo_dblib' => array(
			'func' => 'extension_check',
			'warning' => lang('The %1 extension is needed, if you plan to use a %2 database.','pdo_dblib','MsSQL'),
			'win_only' => True
		),
		'odbc' => array(
			'func' => 'extension_check',
			'warning' => lang('The %1 extension is needed, if you plan to use a %2 database.','odbc','MaxDB, MsSQL or Oracle'),
		),
		'pdo_odbc' => array(
			'func' => 'extension_check',
			'warning' => lang('The %1 extension is needed, if you plan to use a %2 database.','pdo_odbc','MaxDB, MsSQL or Oracle'),
		),
		'oci8' => array(
			'func' => 'extension_check',
			'warning' => lang('The %1 extension is needed, if you plan to use a %2 database.','oci','Oracle'),
		),
		'pdo_oci' => array(
			'func' => 'extension_check',
			'warning' => lang('The %1 extension is needed, if you plan to use a %2 database.','pdo_oci','Oracle'),
		),
		'mbstring' => array(
			'func' => 'extension_check',
			'warning' => lang('The mbstring extension is needed to fully support unicode (utf-8) or other multibyte-charsets.')
		),
		'mbstring.func_overload' => array(
			'func' => 'php_ini_check',
			'value' => 7,
			'warning' => '<div class="setup_info">' . lang('The mbstring.func_overload = 7 is needed to fully support unicode (utf-8) or other multibyte-charsets.') . "</div>",
			'change' => extension_loaded('mbstring')  || function_exists('dl') && @dl(PHP_SHLIB_PREFIX.'mbstring.'.PHP_SHLIB_SUFFIX) ? 'mbstring.func_overload = 7' : '',
		),
		'ldap' => array(
			'func' => 'extension_check',
			'warning' => lang("The ldap extension is needed, if you use ldap as account or contact storage, authenticate against ldap or active directory. It's not needed for a standard SQL installation."),
		),
		'' => array(
			'func' => 'pear_check',
			'error' => lang('PEAR extensions are required by many eGroupware applications, PEAR itself is the required basis for each extension!'),
		),
		'HTTP_WebDAV_Server' => array(
			'func' => 'pear_check',
			'from' => 'WebDAV',
		),
		'.' => array(
			'func' => 'permission_check',
			'is_world_writable' => False,
			'recursiv' => True
		),
		'header.inc.php' => array(
			'func' => 'permission_check',
			'is_world_readable' => False,
			'only_if_exists' => @$GLOBALS['egw_info']['setup']['stage']['header'] != 10
		),
	);
	if (extension_loaded('session') && ini_get('session.save_handler') == 'files')
	{
		$checks[session_save_path()] = array(
			'func' => 'permission_check',
			'is_writable' => true,
			'msg' => lang("Checking if php.ini setting session.save_path='%1' is writable by the webserver",session_save_path()),
			'error' => lang('You will NOT be able to log into eGroupWare using PHP sessions: "session could not be verified" !!!'),
		);
	}
	$setup_info = $GLOBALS['egw_setup']->detection->get_versions();
	foreach($setup_info as $app => $app_data)
	{
		if (!isset($app_data['check_install'])) continue;

		foreach ($app_data['check_install'] as $name => $data)
		{
			if (isset($checks[$name]))
			{
				if ($checks[$name] == $data) continue;	// identical check --> ignore it

				if ($data['func'] == 'pear_check' || in_array($data['func'],array('extension_check','php_ini_check')) && !isset($data['warning']))
				{
					if (isset($checks[$name]['from']) && $checks[$name]['from'] && !is_array($checks[$name]['from']))
					{
						$checks[$name]['from'] = array($checks[$name]['from']);
					}
					if (!isset($data['from'])) $data['from'] = $app;
					if (!isset($checks[$name]['from']) || !is_array($checks[$name]['from'])) $checks[$name]['from'] = array();
					if (!in_array($data['from'],$checks[$name]['from'])) $checks[$name]['from'][] = $data['from'];
				}
				else
				{
					$checks[$app.'_'.$name] = $data;
				}
			}
			else
			{
				if (!isset($data['from'])) $data['from'] = $app;
				$checks[$name] = $data;
			}
			//echo "added check $data[func]($name) for $app"; _debug_array($data);
		}
	}
	$sorted_checks = array();
	foreach(array('php_version','php_ini_check','extension_check','pear_check','gd_check','permission_check') as $func)
	{
		foreach($checks as $name => $data)
		{
			if ($data['func'] == $func)
			{
				$sorted_checks[$name] = $data;
				unset($checks[$name]);
			}
		}
	}
	if ($checks) $sorted_checks += $checks;
	$checks =& $sorted_checks;

	// some constants for pre php4.3
	if (!defined('PHP_SHLIB_SUFFIX'))
	{
		define('PHP_SHLIB_SUFFIX',$is_windows ? 'dll' : 'so');
	}
	if (!defined('PHP_SHLIB_PREFIX'))
	{
		define('PHP_SHLIB_PREFIX',PHP_SHLIB_SUFFIX == 'dll' ? 'php_' : '');
	}

	function php_version($name,$args)
	{
		global $passed_icon, $error_icon;

		$version_ok = version_compare(phpversion(),$args['value']) >= 0;

		echo '<div>'.($version_ok ? $passed_icon : $error_icon).' <span'.($version_ok ? '' : ' class="setup_error"').'>'.
			lang('Checking required PHP version %1 (recommended %2)',$args['verbose_value'],$args['recommended']).': '.
			phpversion().' ==> '.($version_ok ? lang('True') : lang('False'))."</span></div>\n";
	}

	/**
	 * quering the pear registry to find out which pear packages and versions are installed
	 *
	 * @return array with package-name => version pairs, eg. array('Log' => '1.9.8','PEAR' => '1.4.11')
	 */
	function get_installed_pear_packages()
	{
		$pear_config = '';	// use the system default
		// fix for SuSE having the pear.conf only for cli, will fail with open_basedir - no idea what to do then
		if (@is_dir('/etc/php5/apache2') && !file_exists('/etc/php5/apache2/pear.conf') && @file_exists('/etc/php5/cli/pear.conf'))
		{
			$pear_config = '/etc/php5/cli/pear.conf';
		}
		@include_once 'PEAR/Config.php';

		if (!class_exists('PEAR_Config')) return false;

		$config = new PEAR_Config('',$pear_config);
		//echo "<pre>config = ".print_r($config,true)."</pre>\n";

		$channel = $config->get('default_channel');
		//echo "<pre>channel = ".print_r($channel,true)."</pre>\n";

		if (!method_exists($config,'getRegistry')) return false;	// PEAR version to old

		$reg = &$config->getRegistry();
		//echo "<pre>reg = ".print_r($reg,true)."</pre>\n";

		// a bug in pear causes an endless loop if the install-dir does not exist
		// bug reported: http://pear.php.net/bugs/bug.php?id=11317
		if (!file_exists($reg->install_dir)) return false;

		$installed = $reg->packageInfo(null,null,$channel);

		//echo "<pre>installed =".print_r($installed,true)."</pre>\n";
		$packages = array();
		foreach($installed as $package)
		{
			$name = isset($package['package']) ? $package['package'] : $package['name'];
			$version = $package['version'];
			if (is_array($version)) $version = $version['release'];

			$packages[$name] = $version;
		//	echo "<p>$name: ".print_r($package['version'],true)."</p>\n";
		}
		ksort($packages);

		return $packages;
	}

	function pear_check($package,$args)
	{
		global $passed_icon, $warning_icon;
		static $pear_available = null;
		static $pear_packages = null;

		$min_version = isset($args['version']) ? $args['version'] : null;

		if (is_null($pear_packages))
		{
			$pear_packages = get_installed_pear_packages();
		}
		$version_available = false;

		// check if egw-pear is availible and packages is included
		if ($package && is_dir('../egw-pear') && file_exists('../egw-pear/'.str_replace('_','/',$package).'.php'))
		{
			$available = true;
			$version_available = '999.egw-pear';
		}
		// packages found in the pear registry --> use that info
		elseif ($pear_packages)
		{
			$pear_available = true;
			// check if package is installed
			if ($package && isset($pear_packages[$package])) $available = true;
			// check if it's the right version
			$version_available = $pear_packages[$package ? $package : 'PEAR'];
		}
		else	// use the old checks as fallback
		{
			if (is_null($pear_available))
			{
				$pear_available = @include_once('PEAR.php');

				if (!class_exists('PEAR')) $pear_available = false;
			}
			if ($pear_available && $package)
			{
				$file = str_replace('_','/',$package).'.php';

				$available = @include_once($file);

				if (!class_exists($package)) $available = false;
			}
		}
		// is the right version availible
		$available = (@$available || $pear_available && !$package) && (!$min_version || version_compare($min_version,$version_available) <= 0);
		echo '<div>'.($available ? $passed_icon : $warning_icon).' <span'.($available ? '' : ' class="setup_warning"').'>'.
			lang('Checking PEAR%1 is installed',($package?'::'.$package:'').($min_version?" ($min_version)":'')).': '.
			($available ? ($version_available ? $version_available : lang('True')) : lang('False'))."</span></div>\n";

		if (!$available)	// give further info only if not availible
		{
			echo '<div class="setup_info">' . lang('PEAR%1 is needed by: %2.',$package ? '::'.$package : '',
				is_array($args['from']) ? implode(', ',$args['from']) : $args['from']);

			if (!$pear_available)
			{
				echo ' '.lang('PEAR (%1) is a PHP repository and is usually in a package called %2.',
					'<a href="http://pear.php.net" target="_blank">pear.php.net</a>','php-pear');
			}
			elseif ($min_version && !$version_available)
			{
				echo ' '.lang('We could not determine the version of %1, please make sure it is at least %2',$package,$min_version);
			}
			elseif ($min_version && version_compare($min_version,$version_available) > 0)
			{
				echo ' '.lang('Your installed version of %1 is %2, required is at least %3, please run: ',
					$package,$version_available,$min_version).' pear update '.$package;
			}
			elseif ($package)
			{
				echo ' '.lang('You can install it by running:').' pear install '.$package;
			}
			echo "</div>";
		}
		echo "\n";

		return $available;
	}

	function extension_check($name,$args)
	{
		//echo "<p>extension_check($name,".print_r($args,true).")</p>\n";
		global $passed_icon, $error_icon, $warning_icon, $is_windows;

		if (isset($args['win_only']) && $args['win_only'] && !$is_windows)
		{
			return True;	// check only under windows
		}
		// we check for the existens of 'dl', as multithreaded webservers dont have it !!!
		$available = extension_loaded($name) || function_exists('dl') && @dl(PHP_SHLIB_PREFIX.$name.'.'.PHP_SHLIB_SUFFIX);

		echo '<div>'.($available ? $passed_icon : $warning_icon).' <span'.($available ? '' : ' class="setup_warning"').'>'.lang('Checking extension %1 is loaded or loadable',$name).': '.($available ? lang('True') : lang('False'))."</span></div>\n";

		if (!$available)
		{
			if (!isset($args['warning']))
			{
				$args['warning'] = lang('The %1 extension is needed from: %2.',$name,
					is_array($args['from']) ? implode(', ',$args['from']) : $args['from']);
			}
			echo "<div class='setup_info'>".$args['warning'].'</div>';
		}
		echo "\n";

		return $available;
	}

	function function_check($name,$args)
	{
		global $passed_icon, $error_icon, $warning_icon, $is_windows;

		$available = function_exists($name);

		echo '<div>'.($available ? $passed_icon : $warning_icon).' <span'.($available ? '' : ' class="setup_warning"').'>'.lang('Checking function %1 exists',$name).': '.($available ? lang('True') : lang('False'))."</span></div>\n";

		if (!$available)
		{
			if (!isset($args['warning']))
			{
				$args['warning'] = lang('The function %1 is needed from: %2.',$name,
					is_array($args['from'] ? implode(', ',$args['from']) : $args['from']));
			}
			echo "<div class='setup_info'>".$args['warning'].'</div>';
		}
		echo "\n";

		return $available;
	}

	function verbosePerms( $in_Perms )
	{
		if($in_Perms & 0x1000)     // FIFO pipe
		{
			$sP = 'p';
		}
		elseif($in_Perms & 0x2000) // Character special
		{
			$sP = 'c';
		}
		elseif($in_Perms & 0x4000) // Directory
		{
			$sP = 'd';
		}
		elseif($in_Perms & 0x6000) // Block special
		{
			$sP = 'b';
		}
		elseif($in_Perms & 0x8000) // Regular
		{
			$sP = '-';
		}
		elseif($in_Perms & 0xA000) // Symbolic Link
		{
			$sP = 'l';
		}
		elseif($in_Perms & 0xC000) // Socket
		{
			$sP = 's';
		}
		else                         // UNKNOWN
		{
			$sP = 'u';
		}

		// owner
		$sP .= (($in_Perms & 0x0100) ? 'r' : '-') .
		(($in_Perms & 0x0080) ? 'w' : '-') .
		(($in_Perms & 0x0040) ? (($in_Perms & 0x0800) ? 's' : 'x' ) :
		(($in_Perms & 0x0800) ? 'S' : '-'));

		// group
		$sP .= (($in_Perms & 0x0020) ? 'r' : '-') .
		(($in_Perms & 0x0010) ? 'w' : '-') .
		(($in_Perms & 0x0008) ? (($in_Perms & 0x0400) ? 's' : 'x' ) :
		(($in_Perms & 0x0400) ? 'S' : '-'));

		// world
		$sP .= (($in_Perms & 0x0004) ? 'r' : '-') .
		(($in_Perms & 0x0002) ? 'w' : '-') .
		(($in_Perms & 0x0001) ? (($in_Perms & 0x0200) ? 't' : 'x' ) :
		(($in_Perms & 0x0200) ? 'T' : '-'));
		return $sP;
	}

	function permission_check($name,$args,$verbose=True)
	{
		global $passed_icon, $error_icon, $warning_icon,$is_windows;
		//echo "<p>permision_check('$name',".print_r($args,True).",'$verbose')</p>\n";

		// add a ../ for non-absolute pathes
		$rel_name = $name;
		if (substr($name,0,3) != '../' && $name{0} != '/' && $name{0} != '\\' && strpos($name,':') === false)
		{
			$name = '../'.$name;
		}
		if (!file_exists($name) && isset($args['only_if_exists']) && $args['only_if_exists'])
		{
			return True;
		}

		$perms = $checks = '';
		if (file_exists($name))
		{
			$owner = function_exists('posix_getpwuid') ? posix_getpwuid(@fileowner($name)) : array('name' => 'nn');
			$group = function_exists('posix_getgrgid') ? posix_getgrgid(@filegroup($name)) : array('name' => 'nn');
			$perms = "$owner[name]/$group[name] ".verbosePerms(@fileperms($name));
		}

		$checks = array();
		if (isset($args['is_readable']))
		{
			$checks[] = lang('readable by the webserver');
			$check_not = (!$args['is_readable']?lang('not'):'');
		}
		if (isset($args['is_writable']))
		{
			$checks[] = lang('writable by the webserver');
			$check_not = (!$args['is_writable']?lang('not'):'');
		}
		if (isset($args['is_world_readable']))
		{
			$checks[] = lang('world readable');
			$check_not = (!$args['is_world_readable']?lang('not'):'');
		}
		if (isset($args['is_world_writable']))
		{
			$checks[] = lang('world writable');
			$check_not = (!$args['is_world_writable']?lang('not'):'');
		}
		$checks = implode(', ',$checks);

		$icon = $passed_icon;
		if (isset($args['msg']) && ($msg = $args['msg']))
		{
			$msg .= ': '.$perms."<br />\n";
		}
		else
		{
			$msg = lang('Checking file-permissions of %1 for %2 %3: %4',$rel_name,$check_not,$checks,$perms)."<br />\n";
		}
		$extra_error_msg = '';
		if (isset($args['error']) && $args['error'])
		{
			$extra_error_msg = "<br />\n".$args['error'];
		}
		if (!file_exists($name))
		{
			echo '<div>'. $error_icon . '<span class="setup_error">' . $msg . lang('%1 does not exist !!!',$rel_name).$extra_error_msg."</span></div>\n";
			return False;
		}
		$warning = False;
		if (!$GLOBALS['run_by_webserver'] && (@$args['is_readable'] || @$args['is_writable']))
		{
			echo $warning_icon.' '.$msg. lang('Check can only be performed, if called via a webserver, as the user-id/-name of the webserver is not known.')."\n";
			unset($args['is_readable']);
			unset($args['is_writable']);
			$warning = True;
		}
		$Ok = True;
		if (isset($args['is_writable']) && is_writable($name) != $args['is_writable'])
		{
			echo '<div>'.$error_icon.' <span class="setup_error">'.$msg.' '.lang('%1 is %2%3 !!!',$rel_name,$args['is_writable']?lang('not').' ':'',lang('writable by the webserver')).$extra_error_msg."</span></div>\n";
			$Ok = False;
		}
		if (isset($args['is_readable']) && is_readable($name) != $args['is_readable'])
		{
			echo '<div>'.$error_icon.' <span class="setup_error">'.$msg.' '.lang('%1 is %2%3 !!!',$rel_name,$args['is_readable']?lang('not').' ':'',lang('readable by the webserver')).$extra_error_msg."</span></div>\n";
			$Ok = False;
		}
		if (!$is_windows && isset($args['is_world_readable']) && !(fileperms($name) & 04) == $args['is_world_readable'])
		{
			echo '<div>'.$error_icon.' <span class="setup_error">'.$msg.' '.lang('%1 is %2%3 !!!',$rel_name,$args['is_world_readable']?lang('not').' ':'',lang('world readable')).$extra_error_msg."</span></div>\n";
			$Ok = False;
		}
		if (!$is_windows && isset($args['is_world_writable']) && !(fileperms($name) & 02) == $args['is_world_writable'])
		{
			echo '<div>'.$error_icon.' <span class="setup_error">'.$msg.' '.lang('%1 is %2%3 !!!',$rel_name,$args['is_world_writable']?lang('not').' ':'',lang('world writable')).$extra_error_msg."</span></div>\n";
			$Ok = False;
		}
		if ($Ok && !$warning && $verbose)
		{
			echo $passed_icon.' '.$msg;
		}
		if ($Ok && @$args['recursiv'] && is_dir($name))
		{
			if ($verbose)
			{
				@set_time_limit(0);
				echo "<div class='setup_info'>" . lang('This might take a while, please wait ...')."</div>\n";
				flush();
			}
			@set_time_limit(0);
			$handle = @opendir($name);
			while($handle && ($file = readdir($handle)))
			{
				if ($file != '.' && $file != '..')
				{
					$Ok = $Ok && permission_check(($name!='.'?$name.'/':'').$file,$args,False);
				}
			}
			if ($handle) closedir($handle);
		}
		if ($verbose) echo "\n";

		return $Ok;
	}

	function mk_value($value)
	{
		if (!preg_match('/^([0-9]+)([mk]+)$/i',$value,$matches)) return $value;

		return (strtolower($matches[2]) == 'm' ? 1024*1024 : 1024) * (int) $matches[1];
	}

	function php_ini_check($name,$args)
	{
		global $passed_icon, $error_icon, $warning_icon, $is_windows;

		$safe_mode = ini_get('safe_mode');

		$ini_value = ini_get($name);
		$check = isset($args['check']) ? $args['check'] : '=';
		$verbose_value = isset($args['verbose_value']) ? $args['verbose_value'] : $args['value'];
		$ini_value_verbose = '';
		if ($verbose_value == 'On' || $verbose_value == 'Off')
		{
			$ini_value_verbose = ' = '.($ini_value ? 'On' : 'Off');
		}
		switch ($check)
		{
			case 'not set':
				$check = lang('not set');
				$result = !($ini_value & $args['value']);
				break;
			case 'set':
				$check = lang('set');
				$result = !!($ini_value & $args['value']);
				break;
			case '>=':
				$result = !$ini_value ||	// value not used, eg. no memory limit
				(int) mk_value($ini_value) >= (int) mk_value($args['value']);
				break;
			case 'contain':
				$check = lang('contain');
				$sep = $is_windows ? '[; ]+' : '[: ]+';
				$result = in_array($args['value'],split($sep,$ini_value));
				break;
			case '=':
			default:
				$result = $ini_value == $args['value'];
				break;
		}
		$msg = ' '.lang('Checking php.ini').": $name $check $verbose_value: <span class='setup_info'>ini_get('$name')='$ini_value'$ini_value_verbose</span>";

		if ($result)
		{
			echo "<div>".$passed_icon.$msg."</div>\n";
		}
		if (!$result)
		{
			if (isset($args['error']))
			{
				echo "<div>".$error_icon.' <span class="setup_error">'.$msg.'</span><div class="setup_info">'.$args['error']."</div></div>\n";
			}
			elseif (isset($args['warning']))
			{
				echo "<div>".$warning_icon.' <span class="setup_warning">'.$msg.'</span><div class="setup_info">'.$args['warning']."</div></div>\n";
			}
			elseif (!isset($args['safe_mode']))
			{
				echo "<div>".$warning_icon.' <span class="setup_warning">'.$msg.'</span><div class="setup_info">'.
					lang('%1 is needed by: %2.',$name,is_array($args['from']) ? implode(', ',$args['from']) : $args['from'])
					."</div></div>\n";
			}
			if (isset($args['safe_mode']) && $safe_mode || @$args['change'])
			{
				if (!isset($args['warning']) && !isset($args['error']))
				{
					echo '<div>'.$error_icon.' <span class="setup_error">'.$msg.'</span></div>';
				}
				echo "<div class='setup_error'>\n";
				echo '*** '.lang('Please make the following change in your php.ini').' ('.get_php_ini().'): '.(@$args['safe_mode']?$args['safe_mode']:$args['change'])."<br />\n";
				echo '*** '.lang('AND reload your webserver, so the above changes take effect !!!')."</div>\n";
			}
		}
		return $result;
	}

	function get_php_ini()
	{
		ob_start();
		phpinfo(INFO_GENERAL);
		$phpinfo = ob_get_contents();
		ob_end_clean();

		return preg_match('/\(php.ini\).*<\/td><td[^>]*>([^ <]+)/',$phpinfo,$found) ? $found[1] : False;
	}

	function gd_check()
	{
		global $passed_icon, $warning_icon;

		$available = (function_exists('imagecopyresampled')  || function_exists('imagecopyresized'));

		echo "<div>".($available ? $passed_icon : $warning_icon).' <span'.($available?'':' class="setup_warning"').'>'.lang('Checking for GD support...').': '.($available ? lang('True') : lang('False'))."</span></div>\n";

		if (!$available)
		{
			echo lang('Your PHP installation does not have appropriate GD support. You need gd library version 1.8 or newer to see Gantt charts in projects.')."\n";
		}
		return $available;
	}

	if ($run_by_webserver)
	{
		$tpl_root = $GLOBALS['egw_setup']->html->setup_tpl_dir('setup');
		$setup_tpl = CreateObject('phpgwapi.Template',$tpl_root);
		$setup_tpl->set_file(array(
			'T_head' => 'head.tpl',
			'T_footer' => 'footer.tpl',
		));
		$ConfigDomain = get_var('ConfigDomain',Array('POST','COOKIE'));
		if (@$_GET['intro']) {
			if($ConfigLang = get_var('ConfigLang',array('POST','COOKIE')))
			{
				$GLOBALS['egw_setup']->set_cookie('ConfigLang',$ConfigLang,(int) (time()+(1200*9)),'/');
			}
			$GLOBALS['egw_setup']->html->show_header(lang('Welcome to the eGroupWare Installation'),False,'config');
			echo '<h1>'.lang('Welcome to the eGroupWare Installation')."</h1>\n";
			if(!$ConfigLang)
			{
				echo '<p><form action="check_install.php?intro=1" method="Post">Please Select your language '.lang_select(True,'en')."</form></p>\n";
			}
			echo '<p>'.lang('The first step in installing eGroupWare is to ensure your environment has the necessary settings to correctly run the application.').'</p>';
			echo '<p>'.lang('We will now run a series of tests, which may take a few minutes.  Click the link below to proceed.').'</p>';
			echo '<h3><a href="check_install.php">'.lang('Run installation tests').'</a></h3>';
			echo '<p><a href="manageheader.php">'.lang('Skip the installation tests (not recommended)')."</a></p>\n";
			$setup_tpl->pparse('out','T_footer');
			exit;
		} else {
			$GLOBALS['egw_setup']->html->show_header(lang('Checking the eGroupWare Installation'),False,'config',$ConfigDomain ? $ConfigDomain . '(' . @$GLOBALS['egw_domain'][$ConfigDomain]['db_type'] . ')' : '');
			echo '<h1>'.lang('Checking the eGroupWare Installation')."</h1>\n";
			# echo "<pre style=\"text-align: left;\">\n";;
		}
	}
	else
	{
		echo "Checking the eGroupWare Installation\n";
		echo "====================================\n\n";
	}

	$Ok = True;
	foreach ($checks as $name => $args)
	{
		$check_ok = $args['func']($name,$args);
		$Ok = $Ok && $check_ok;
	}

	if ($run_by_webserver)
	{
		# echo "</pre>\n";;

		if ($GLOBALS['egw_info']['setup']['stage']['header'] != 10)
		{
			if (!$Ok)
			{
				echo '<h3>'.lang('Please fix the above errors (%1) and warnings(%2)',$error_icon,$warning_icon)."</h3>\n";
				echo '<h3><a href="check_install.php">'.lang('Click here to re-run the installation tests')."</a></h3>\n";
				echo '<h3>'.lang('or %1Continue to the Header Admin%2','<a href="manageheader.php">','</a>')."</h3>\n";
			}
			else
			{
				echo '<h3><a href="manageheader.php">'.lang('Continue to the Header Admin')."</a></h3>\n";
			}
		}
		else
		{
			echo '<h3>';
			if (!$Ok)
			{
				echo lang('Please fix the above errors (%1) and warnings(%2)',$error_icon,$warning_icon).'. ';
			}
			echo '<br /><a href="'.str_replace('check_install.php','',$_SERVER['HTTP_REFERER']).'">'.lang('Return to Setup')."</a></h3>\n";
		}
		$setup_tpl->pparse('out','T_footer');
		//echo "</body>\n</html>\n";
	}
?>