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environmentlib.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* This library includes all the necessary stuff to execute some standard
* tests of required versions and libraries to run Moodle. It can be
* used from the admin interface, and both at install and upgrade.
*
* All the info is stored in the admin/environment.xml file,
* supporting to have an updated version in dataroot/environment
*
* @copyright (C) 2001-3001 Eloy Lafuente (stronk7) {@link http://contiento.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package core
* @subpackage admin
*/
defined('MOODLE_INTERNAL') || die();
/// Add required files
/**
* Include the necessary
*/
require_once($CFG->libdir.'/xmlize.php');
/// Define a bunch of XML processing errors
/** XML Processing Error */
define('NO_ERROR', 0);
/** XML Processing Error */
define('NO_VERSION_DATA_FOUND', 1);
/** XML Processing Error */
define('NO_DATABASE_SECTION_FOUND', 2);
/** XML Processing Error */
define('NO_DATABASE_VENDORS_FOUND', 3);
/** XML Processing Error */
define('NO_DATABASE_VENDOR_MYSQL_FOUND', 4);
/** XML Processing Error */
define('NO_DATABASE_VENDOR_POSTGRES_FOUND', 5);
/** XML Processing Error */
define('NO_PHP_SECTION_FOUND', 6);
/** XML Processing Error */
define('NO_PHP_VERSION_FOUND', 7);
/** XML Processing Error */
define('NO_PHP_EXTENSIONS_SECTION_FOUND', 8);
/** XML Processing Error */
define('NO_PHP_EXTENSIONS_NAME_FOUND', 9);
/** XML Processing Error */
define('NO_DATABASE_VENDOR_VERSION_FOUND', 10);
/** XML Processing Error */
define('NO_UNICODE_SECTION_FOUND', 11);
/** XML Processing Error */
define('NO_CUSTOM_CHECK_FOUND', 12);
/** XML Processing Error */
define('CUSTOM_CHECK_FILE_MISSING', 13);
/** XML Processing Error */
define('CUSTOM_CHECK_FUNCTION_MISSING', 14);
/** XML Processing Error */
define('NO_PHP_SETTINGS_NAME_FOUND', 15);
/** XML Processing Error */
define('INCORRECT_FEEDBACK_FOR_REQUIRED', 16);
/** XML Processing Error */
define('INCORRECT_FEEDBACK_FOR_OPTIONAL', 17);
/// Define algorithm used to select the xml file
/** To select the newer file available to perform checks */
define('ENV_SELECT_NEWER', 0);
/** To enforce the use of the file under dataroot */
define('ENV_SELECT_DATAROOT', 1);
/** To enforce the use of the file under admin (release) */
define('ENV_SELECT_RELEASE', 2);
/**
* This function checks all the requirements defined in environment.xml.
*
* @param string $version version to check.
* @param int $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. Default ENV_SELECT_NEWER (BC)
* @return array with two elements. The first element true/false, depending on
* on whether the check passed. The second element is an array of environment_results
* objects that has detailed information about the checks and which ones passed.
*/
function check_moodle_environment($version, $env_select = ENV_SELECT_NEWER) {
if ($env_select != ENV_SELECT_NEWER and $env_select != ENV_SELECT_DATAROOT and $env_select != ENV_SELECT_RELEASE) {
throw new coding_exception('Incorrect value of $env_select parameter');
}
/// Get the more recent version before the requested
if (!$version = get_latest_version_available($version, $env_select)) {
return array(false, array());
}
/// Perform all the checks
if (!$environment_results = environment_check($version, $env_select)) {
return array(false, array());
}
/// Iterate over all the results looking for some error in required items
/// or some error_code
$result = true;
foreach ($environment_results as $environment_result) {
if (!$environment_result->getStatus() && $environment_result->getLevel() == 'required'
&& !$environment_result->getBypassStr()) {
$result = false; // required item that is not bypased
} else if ($environment_result->getStatus() && $environment_result->getLevel() == 'required'
&& $environment_result->getRestrictStr()) {
$result = false; // required item that is restricted
} else if ($environment_result->getErrorCode()) {
$result = false;
}
}
return array($result, $environment_results);
}
/**
* Returns array of critical errors in plain text format
* @param array $environment_results array of results gathered
* @return array errors
*/
function environment_get_errors($environment_results) {
global $CFG;
$errors = array();
// Iterate over each environment_result
foreach ($environment_results as $environment_result) {
$type = $environment_result->getPart();
$info = $environment_result->getInfo();
$status = $environment_result->getStatus();
$error_code = $environment_result->getErrorCode();
$a = new stdClass();
if ($error_code) {
$a->error_code = $error_code;
$errors[] = array($info, get_string('environmentxmlerror', 'admin', $a));
return $errors;
}
/// Calculate the status value
if ($environment_result->getBypassStr() != '') {
// not interesting
continue;
} else if ($environment_result->getRestrictStr() != '') {
// error
} else {
if ($status) {
// ok
continue;
} else {
if ($environment_result->getLevel() == 'optional') {
// just a warning
continue;
} else {
// error
}
}
}
// We are comparing versions
$rec = new stdClass();
if ($rec->needed = $environment_result->getNeededVersion()) {
$rec->current = $environment_result->getCurrentVersion();
if ($environment_result->getLevel() == 'required') {
$stringtouse = 'environmentrequireversion';
} else {
$stringtouse = 'environmentrecommendversion';
}
// We are checking installed & enabled things
} else if ($environment_result->getPart() == 'custom_check') {
if ($environment_result->getLevel() == 'required') {
$stringtouse = 'environmentrequirecustomcheck';
} else {
$stringtouse = 'environmentrecommendcustomcheck';
}
} else if ($environment_result->getPart() == 'php_setting') {
if ($status) {
$stringtouse = 'environmentsettingok';
} else if ($environment_result->getLevel() == 'required') {
$stringtouse = 'environmentmustfixsetting';
} else {
$stringtouse = 'environmentshouldfixsetting';
}
} else {
if ($environment_result->getLevel() == 'required') {
$stringtouse = 'environmentrequireinstall';
} else {
$stringtouse = 'environmentrecommendinstall';
}
}
$report = get_string($stringtouse, 'admin', $rec);
// Here we'll store all the feedback found
$feedbacktext = '';
// Append the feedback if there is some
$feedbacktext .= $environment_result->strToReport($environment_result->getFeedbackStr(), 'error');
// Append the restrict if there is some
$feedbacktext .= $environment_result->strToReport($environment_result->getRestrictStr(), 'error');
$report .= html_to_text($feedbacktext);
if ($environment_result->getPart() == 'custom_check'){
$errors[] = array($info, $report);
} else {
$errors[] = array(($info !== '' ? "$type $info" : $type), $report);
}
}
return $errors;
}
/**
* This function will normalize any version to just a serie of numbers
* separated by dots. Everything else will be removed.
*
* @param string $version the original version
* @return string the normalized version
*/
function normalize_version($version) {
/// 1.9 Beta 2 should be read 1.9 on enviromental checks, not 1.9.2
/// we can discard everything after the first space
$version = trim($version);
$versionarr = explode(" ",$version);
if (!empty($versionarr)) {
$version = $versionarr[0];
}
/// Replace everything but numbers and dots by dots
$version = preg_replace('/[^\.\d]/', '.', $version);
/// Combine multiple dots in one
$version = preg_replace('/(\.{2,})/', '.', $version);
/// Trim possible leading and trailing dots
$version = trim($version, '.');
return $version;
}
/**
* This function will load the environment.xml file and xmlize it
*
* @staticvar array $data
* @uses ENV_SELECT_NEWER
* @uses ENV_SELECT_DATAROOT
* @uses ENV_SELECT_RELEASE
* @param int|string $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. String means plugin name.
* @return mixed the xmlized structure or false on error
*/
function load_environment_xml($env_select=ENV_SELECT_NEWER) {
global $CFG;
static $data = array(); // Only load and xmlize once by request.
if (isset($data[$env_select])) {
return $data[$env_select];
}
$contents = false;
if (is_numeric($env_select)) {
$file = $CFG->dataroot.'/environment/environment.xml';
$internalfile = $CFG->dirroot.'/'.$CFG->admin.'/environment.xml';
switch ($env_select) {
case ENV_SELECT_NEWER:
if (!is_file($file) || !is_readable($file) || filemtime($file) < filemtime($internalfile) ||
!$contents = file_get_contents($file)) {
/// Fallback to fixed $CFG->admin/environment.xml
if (!is_file($internalfile) || !is_readable($internalfile) || !$contents = file_get_contents($internalfile)) {
$contents = false;
}
}
break;
case ENV_SELECT_DATAROOT:
if (!is_file($file) || !is_readable($file) || !$contents = file_get_contents($file)) {
$contents = false;
}
break;
case ENV_SELECT_RELEASE:
if (!is_file($internalfile) || !is_readable($internalfile) || !$contents = file_get_contents($internalfile)) {
$contents = false;
}
break;
}
} else {
if ($plugindir = core_component::get_component_directory($env_select)) {
$pluginfile = "$plugindir/environment.xml";
if (!is_file($pluginfile) || !is_readable($pluginfile) || !$contents = file_get_contents($pluginfile)) {
$contents = false;
}
}
}
// XML the whole file.
if ($contents !== false) {
$contents = xmlize($contents);
}
$data[$env_select] = $contents;
return $data[$env_select];
}
/**
* This function will return the list of Moodle versions available
*
* @return array of versions
*/
function get_list_of_environment_versions($contents) {
$versions = array();
if (isset($contents['COMPATIBILITY_MATRIX']['#']['MOODLE'])) {
foreach ($contents['COMPATIBILITY_MATRIX']['#']['MOODLE'] as $version) {
$versions[] = $version['@']['version'];
}
}
if (isset($contents['COMPATIBILITY_MATRIX']['#']['PLUGIN'])) {
$versions[] = 'all';
}
return $versions;
}
/**
* This function will return the most recent version in the environment.xml
* file previous or equal to the version requested
*
* @param string $version top version from which we start to look backwards
* @param int $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use.
* @return string|bool string more recent version or false if not found
*/
function get_latest_version_available($version, $env_select) {
if ($env_select != ENV_SELECT_NEWER and $env_select != ENV_SELECT_DATAROOT and $env_select != ENV_SELECT_RELEASE) {
throw new coding_exception('Incorrect value of $env_select parameter');
}
/// Normalize the version requested
$version = normalize_version($version);
/// Load xml file
if (!$contents = load_environment_xml($env_select)) {
return false;
}
/// Detect available versions
if (!$versions = get_list_of_environment_versions($contents)) {
return false;
}
/// First we look for exact version
if (in_array($version, $versions)) {
return $version;
} else {
$found_version = false;
/// Not exact match, so we are going to iterate over the list searching
/// for the latest version before the requested one
foreach ($versions as $arrversion) {
if (version_compare($arrversion, $version, '<')) {
$found_version = $arrversion;
}
}
}
return $found_version;
}
/**
* This function will return the xmlized data belonging to one Moodle version
*
* @param string $version top version from which we start to look backwards
* @param int|string $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. String means plugin name.
* @return mixed the xmlized structure or false on error
*/
function get_environment_for_version($version, $env_select) {
/// Normalize the version requested
$version = normalize_version($version);
/// Load xml file
if (!$contents = load_environment_xml($env_select)) {
return false;
}
/// Detect available versions
if (!$versions = get_list_of_environment_versions($contents)) {
return false;
}
// If $env_select is not numeric then this is being called on a plugin, and not the core environment.xml
// If a version of 'all' is in the arry is also means that the new <PLUGIN> tag was found, this should
// be matched against any version of Moodle.
if (!is_numeric($env_select) && in_array('all', $versions)
&& environment_verify_plugin($env_select, $contents['COMPATIBILITY_MATRIX']['#']['PLUGIN'][0])) {
return $contents['COMPATIBILITY_MATRIX']['#']['PLUGIN'][0];
}
/// If the version requested is available
if (!in_array($version, $versions)) {
return false;
}
/// We now we have it. Extract from full contents.
$fl_arr = array_flip($versions);
return $contents['COMPATIBILITY_MATRIX']['#']['MOODLE'][$fl_arr[$version]];
}
/**
* Checks if a plugin tag has a name attribute and it matches the plugin being tested.
*
* @param string $plugin the name of the plugin.
* @param array $pluginxml the xmlised structure for the plugin tag being tested.
* @return boolean true if the name attribute exists and matches the plugin being tested.
*/
function environment_verify_plugin($plugin, $pluginxml) {
if (!isset($pluginxml['@']['name']) || $pluginxml['@']['name'] != $plugin) {
return false;
}
return true;
}
/**
* This function will check for everything (DB, PHP and PHP extensions for now)
* returning an array of environment_result objects.
*
* @global object
* @param string $version xml version we are going to use to test this server
* @param int $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use.
* @return environment_results[] array of results encapsulated in one environment_result object
*/
function environment_check($version, $env_select) {
global $CFG;
if ($env_select != ENV_SELECT_NEWER and $env_select != ENV_SELECT_DATAROOT and $env_select != ENV_SELECT_RELEASE) {
throw new coding_exception('Incorrect value of $env_select parameter');
}
/// Normalize the version requested
$version = normalize_version($version);
$results = array(); //To store all the results
/// Only run the moodle versions checker on upgrade, not on install
if (!empty($CFG->version)) {
$results[] = environment_check_moodle($version, $env_select);
}
$results[] = environment_check_unicode($version, $env_select);
$results[] = environment_check_database($version, $env_select);
$results[] = environment_check_php($version, $env_select);
if ($result = environment_check_pcre_unicode($version, $env_select)) {
$results[] = $result;
}
$phpext_results = environment_check_php_extensions($version, $env_select);
$results = array_merge($results, $phpext_results);
$phpsetting_results = environment_check_php_settings($version, $env_select);
$results = array_merge($results, $phpsetting_results);
$custom_results = environment_custom_checks($version, $env_select);
$results = array_merge($results, $custom_results);
// Always use the plugin directory version of environment.xml,
// add-on developers need to keep those up-to-date with future info.
foreach (core_component::get_plugin_types() as $plugintype => $unused) {
foreach (core_component::get_plugin_list_with_file($plugintype, 'environment.xml') as $pluginname => $unused) {
$plugin = $plugintype . '_' . $pluginname;
$result = environment_check_database($version, $plugin);
if ($result->error_code != NO_VERSION_DATA_FOUND
and $result->error_code != NO_DATABASE_SECTION_FOUND
and $result->error_code != NO_DATABASE_VENDORS_FOUND) {
$result->plugin = $plugin;
$results[] = $result;
}
$result = environment_check_php($version, $plugin);
if ($result->error_code != NO_VERSION_DATA_FOUND
and $result->error_code != NO_PHP_SECTION_FOUND
and $result->error_code != NO_PHP_VERSION_FOUND) {
$result->plugin = $plugin;
$results[] = $result;
}
$pluginresults = environment_check_php_extensions($version, $plugin);
foreach ($pluginresults as $result) {
if ($result->error_code != NO_VERSION_DATA_FOUND
and $result->error_code != NO_PHP_EXTENSIONS_SECTION_FOUND) {
$result->plugin = $plugin;
$results[] = $result;
}
}
$pluginresults = environment_check_php_settings($version, $plugin);
foreach ($pluginresults as $result) {
if ($result->error_code != NO_VERSION_DATA_FOUND) {
$result->plugin = $plugin;
$results[] = $result;
}
}
$pluginresults = environment_custom_checks($version, $plugin);
foreach ($pluginresults as $result) {
if ($result->error_code != NO_VERSION_DATA_FOUND) {
$result->plugin = $plugin;
$results[] = $result;
}
}
}
}
return $results;
}
/**
* This function will check if php extensions requirements are satisfied
*
* @uses NO_VERSION_DATA_FOUND
* @uses NO_PHP_EXTENSIONS_SECTION_FOUND
* @uses NO_PHP_EXTENSIONS_NAME_FOUND
* @param string $version xml version we are going to use to test this server
* @param int|string $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. String means plugin name.
* @return array array of results encapsulated in one environment_result object
*/
function environment_check_php_extensions($version, $env_select) {
$results = array();
/// Get the enviroment version we need
if (!$data = get_environment_for_version($version, $env_select)) {
/// Error. No version data found
$result = new environment_results('php_extension');
$result->setStatus(false);
$result->setErrorCode(NO_VERSION_DATA_FOUND);
return array($result);
}
/// Extract the php_extension part
if (!isset($data['#']['PHP_EXTENSIONS']['0']['#']['PHP_EXTENSION'])) {
/// Error. No PHP section found
$result = new environment_results('php_extension');
$result->setStatus(false);
$result->setErrorCode(NO_PHP_EXTENSIONS_SECTION_FOUND);
return array($result);
}
/// Iterate over extensions checking them and creating the needed environment_results
foreach($data['#']['PHP_EXTENSIONS']['0']['#']['PHP_EXTENSION'] as $extension) {
$result = new environment_results('php_extension');
/// Check for level
$level = get_level($extension);
/// Check for extension name
if (!isset($extension['@']['name'])) {
$result->setStatus(false);
$result->setErrorCode(NO_PHP_EXTENSIONS_NAME_FOUND);
} else {
$extension_name = $extension['@']['name'];
/// The name exists. Just check if it's an installed extension
if (!extension_loaded($extension_name)) {
$result->setStatus(false);
} else {
$result->setStatus(true);
}
$result->setLevel($level);
$result->setInfo($extension_name);
}
/// Do any actions defined in the XML file.
process_environment_result($extension, $result);
/// Add the result to the array of results
$results[] = $result;
}
return $results;
}
/**
* This function will check if php extensions requirements are satisfied
*
* @uses NO_VERSION_DATA_FOUND
* @uses NO_PHP_SETTINGS_NAME_FOUND
* @param string $version xml version we are going to use to test this server
* @param int|string $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. String means plugin name.
* @return array array of results encapsulated in one environment_result object
*/
function environment_check_php_settings($version, $env_select) {
$results = array();
/// Get the enviroment version we need
if (!$data = get_environment_for_version($version, $env_select)) {
/// Error. No version data found
$result = new environment_results('php_setting');
$result->setStatus(false);
$result->setErrorCode(NO_VERSION_DATA_FOUND);
$results[] = $result;
return $results;
}
/// Extract the php_setting part
if (!isset($data['#']['PHP_SETTINGS']['0']['#']['PHP_SETTING'])) {
/// No PHP section found - ignore
return $results;
}
/// Iterate over settings checking them and creating the needed environment_results
foreach($data['#']['PHP_SETTINGS']['0']['#']['PHP_SETTING'] as $setting) {
$result = new environment_results('php_setting');
/// Check for level
$level = get_level($setting);
$result->setLevel($level);
/// Check for extension name
if (!isset($setting['@']['name'])) {
$result->setStatus(false);
$result->setErrorCode(NO_PHP_SETTINGS_NAME_FOUND);
} else {
$setting_name = $setting['@']['name'];
$setting_value = $setting['@']['value'];
$result->setInfo($setting_name);
if ($setting_name == 'memory_limit') {
$current = ini_get('memory_limit');
if ($current == -1) {
$result->setStatus(true);
} else {
$current = get_real_size($current);
$minlimit = get_real_size($setting_value);
if ($current < $minlimit) {
@ini_set('memory_limit', $setting_value);
$current = ini_get('memory_limit');
$current = get_real_size($current);
}
$result->setStatus($current >= $minlimit);
}
} else {
$current = ini_get_bool($setting_name);
/// The name exists. Just check if it's an installed extension
if ($current == $setting_value) {
$result->setStatus(true);
} else {
$result->setStatus(false);
}
}
}
/// Do any actions defined in the XML file.
process_environment_result($setting, $result);
/// Add the result to the array of results
$results[] = $result;
}
return $results;
}
/**
* This function will do the custom checks.
*
* @uses CUSTOM_CHECK_FUNCTION_MISSING
* @uses CUSTOM_CHECK_FILE_MISSING
* @uses NO_CUSTOM_CHECK_FOUND
* @param string $version xml version we are going to use to test this server.
* @param int|string $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. String means plugin name.
* @return array array of results encapsulated in environment_result objects.
*/
function environment_custom_checks($version, $env_select) {
global $CFG;
$results = array();
/// Get current Moodle version (release) for later compare
$release = isset($CFG->release) ? $CFG->release : $version; /// In case $CFG fails (at install) use $version
$current_version = normalize_version($release);
/// Get the enviroment version we need
if (!$data = get_environment_for_version($version, $env_select)) {
/// Error. No version data found - but this will already have been reported.
return $results;
}
/// Extract the CUSTOM_CHECKS part
if (!isset($data['#']['CUSTOM_CHECKS']['0']['#']['CUSTOM_CHECK'])) {
/// No custom checks found - not a problem
return $results;
}
/// Iterate over extensions checking them and creating the needed environment_results
foreach($data['#']['CUSTOM_CHECKS']['0']['#']['CUSTOM_CHECK'] as $check) {
$result = new environment_results('custom_check');
/// Check for level
$level = get_level($check);
/// Check for extension name
if (isset($check['@']['function'])) {
$function = $check['@']['function'];
$file = null;
if (isset($check['@']['file'])) {
$file = $CFG->dirroot . '/' . $check['@']['file'];
if (is_readable($file)) {
include_once($file);
}
}
if (is_callable($function)) {
$result->setLevel($level);
$result->setInfo($function);
$result = call_user_func($function, $result);
} else if (!$file or is_readable($file)) {
/// Only show error for current version (where function MUST exist)
/// else, we are performing custom checks against future versiosn
/// and function MAY not exist, so it doesn't cause error, just skip
/// custom check by returning null. MDL-15939
if (version_compare($current_version, $version, '>=')) {
$result->setStatus(false);
$result->setInfo($function);
$result->setErrorCode(CUSTOM_CHECK_FUNCTION_MISSING);
} else {
$result = null;
}
} else {
/// Only show error for current version (where function MUST exist)
/// else, we are performing custom checks against future versiosn
/// and function MAY not exist, so it doesn't cause error, just skip
/// custom check by returning null. MDL-15939
if (version_compare($current_version, $version, '>=')) {
$result->setStatus(false);
$result->setInfo($function);
$result->setErrorCode(CUSTOM_CHECK_FILE_MISSING);
} else {
$result = null;
}
}
} else {
$result->setStatus(false);
$result->setErrorCode(NO_CUSTOM_CHECK_FOUND);
}
if (!is_null($result)) {
/// Do any actions defined in the XML file.
process_environment_result($check, $result);
/// Add the result to the array of results
$results[] = $result;
}
}
return $results;
}
/**
* This function will check if Moodle requirements are satisfied
*
* @uses NO_VERSION_DATA_FOUND
* @param string $version xml version we are going to use to test this server
* @param int|string $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. String means plugin name.
* @return object results encapsulated in one environment_result object
*/
function environment_check_moodle($version, $env_select) {
$result = new environment_results('moodle');
/// Get the enviroment version we need
if (!$data = get_environment_for_version($version, $env_select)) {
/// Error. No version data found
$result->setStatus(false);
$result->setErrorCode(NO_VERSION_DATA_FOUND);
return $result;
}
/// Extract the moodle part
if (!isset($data['@']['requires'])) {
$needed_version = '1.0'; /// Default to 1.0 if no moodle requires is found
} else {
/// Extract required moodle version
$needed_version = $data['@']['requires'];
}
/// Now search the version we are using
$release = get_config('', 'release');
$current_version = normalize_version($release);
if (strpos($release, 'dev') !== false) {
// when final version is required, dev is NOT enough!
$current_version = $current_version - 0.1;
}
/// And finally compare them, saving results
if (version_compare($current_version, $needed_version, '>=')) {
$result->setStatus(true);
} else {
$result->setStatus(false);
}
$result->setLevel('required');
$result->setCurrentVersion($release);
$result->setNeededVersion($needed_version);
return $result;
}
/**
* This function will check if php requirements are satisfied
*
* @uses NO_VERSION_DATA_FOUND
* @uses NO_PHP_SECTION_FOUND
* @uses NO_PHP_VERSION_FOUND
* @param string $version xml version we are going to use to test this server
* @param int|string $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. String means plugin name.
* @return object results encapsulated in one environment_result object
*/
function environment_check_php($version, $env_select) {
$result = new environment_results('php');
/// Get the enviroment version we need
if (!$data = get_environment_for_version($version, $env_select)) {
/// Error. No version data found
$result->setStatus(false);
$result->setErrorCode(NO_VERSION_DATA_FOUND);
return $result;
}
/// Extract the php part
if (!isset($data['#']['PHP'])) {
/// Error. No PHP section found
$result->setStatus(false);
$result->setErrorCode(NO_PHP_SECTION_FOUND);
return $result;
} else {
/// Extract level and version
$level = get_level($data['#']['PHP']['0']);
if (!isset($data['#']['PHP']['0']['@']['version'])) {
$result->setStatus(false);
$result->setErrorCode(NO_PHP_VERSION_FOUND);
return $result;
} else {
$needed_version = $data['#']['PHP']['0']['@']['version'];
}
}
/// Now search the version we are using
$current_version = normalize_version(phpversion());
/// And finally compare them, saving results
if (version_compare($current_version, $needed_version, '>=')) {
$result->setStatus(true);
} else {
$result->setStatus(false);
}
$result->setLevel($level);
$result->setCurrentVersion($current_version);
$result->setNeededVersion($needed_version);
/// Do any actions defined in the XML file.
process_environment_result($data['#']['PHP'][0], $result);
return $result;
}
/**
* Looks for buggy PCRE implementation, we need unicode support in Moodle...
* @param string $version xml version we are going to use to test this server
* @param int|string $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. String means plugin name.
* @return stdClass results encapsulated in one environment_result object, null if irrelevant
*/
function environment_check_pcre_unicode($version, $env_select) {
$result = new environment_results('pcreunicode');
// Get the environment version we need
if (!$data = get_environment_for_version($version, $env_select)) {
// Error. No version data found!
$result->setStatus(false);
$result->setErrorCode(NO_VERSION_DATA_FOUND);
return $result;
}
if (!isset($data['#']['PCREUNICODE'])) {
return null;
}
$level = get_level($data['#']['PCREUNICODE']['0']);
$result->setLevel($level);
if (!function_exists('preg_match')) {
// The extension test fails instead.
return null;
} else if (@preg_match('/\pL/u', 'a') and @preg_match('/á/iu', 'Á')) {
$result->setStatus(true);
} else {
$result->setStatus(false);
}
// Do any actions defined in the XML file.
process_environment_result($data['#']['PCREUNICODE'][0], $result);
return $result;
}
/**
* This function will check if unicode database requirements are satisfied
*
* @uses NO_VERSION_DATA_FOUND
* @uses NO_UNICODE_SECTION_FOUND
* @param string $version xml version we are going to use to test this server
* @param int|string $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. String means plugin name.
* @return object results encapsulated in one environment_result object
*/
function environment_check_unicode($version, $env_select) {
global $DB;
$result = new environment_results('unicode');
/// Get the enviroment version we need
if (!$data = get_environment_for_version($version, $env_select)) {
/// Error. No version data found
$result->setStatus(false);
$result->setErrorCode(NO_VERSION_DATA_FOUND);
return $result;
}
/// Extract the unicode part
if (!isset($data['#']['UNICODE'])) {
/// Error. No UNICODE section found
$result->setStatus(false);
$result->setErrorCode(NO_UNICODE_SECTION_FOUND);
return $result;
} else {
/// Extract level
$level = get_level($data['#']['UNICODE']['0']);
}
if (!$unicodedb = $DB->setup_is_unicodedb()) {
$result->setStatus(false);
} else {
$result->setStatus(true);
}
$result->setLevel($level);
/// Do any actions defined in the XML file.
process_environment_result($data['#']['UNICODE'][0], $result);
return $result;
}
/**
* This function will check if database requirements are satisfied
*
* @uses NO_VERSION_DATA_FOUND
* @uses NO_DATABASE_SECTION_FOUND
* @uses NO_DATABASE_VENDORS_FOUND
* @uses NO_DATABASE_VENDOR_MYSQL_FOUND
* @uses NO_DATABASE_VENDOR_POSTGRES_FOUND
* @uses NO_DATABASE_VENDOR_VERSION_FOUND
* @param string $version xml version we are going to use to test this server
* @param int|string $env_select one of ENV_SELECT_NEWER | ENV_SELECT_DATAROOT | ENV_SELECT_RELEASE decide xml to use. String means plugin name.
* @return object results encapsulated in one environment_result object
*/
function environment_check_database($version, $env_select) {
global $DB;
$result = new environment_results('database');
$vendors = array(); //Array of vendors in version
/// Get the enviroment version we need
if (!$data = get_environment_for_version($version, $env_select)) {
/// Error. No version data found
$result->setStatus(false);
$result->setErrorCode(NO_VERSION_DATA_FOUND);
return $result;
}
/// Extract the database part
if (!isset($data['#']['DATABASE'])) {
/// Error. No DATABASE section found