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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/>.
// MOODLE_INTERNAL check intentionally missing to allow this to be used more widely!
/**
* A set of PHP-compatible convenience functions to check Moodle minimum PHP version in
* a unified place.
*
* PLEASE NOTE: This file is made to be both php-version compatible and without requirement on
* any moodle functions or installation so it can be used in installer or incompatible PHP versions.
*
* @package core
* @copyright 2017 Dan Poltawski <dan@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
/**
* Require our minimum php version or halt execution if requirement not met.
* @return void Execution is halted if version is not met.
*/
function moodle_require_minimum_php_version() {
// PLEASE NOTE THIS FUNCTION MUST BE COMPATIBLE WITH OLD UNSUPPORTED VERSIONS OF PHP!
moodle_minimum_php_version_is_met(true);
}
/**
* Tests the current PHP version against Moodle's minimum requirement. When requirement
* is not met returns false or halts execution depending $haltexecution param.
*
* @param bool $haltexecution Should execution be halted when requirement not met? Defaults to false.
* @return bool returns true if requirement is met (false if not)
*/
function moodle_minimum_php_version_is_met($haltexecution = false) {
// PLEASE NOTE THIS FUNCTION MUST BE COMPATIBLE WITH OLD UNSUPPORTED VERSIONS OF PHP.
// Do not use modern php features or Moodle convenience functions (e.g. localised strings).
$minimumversion = '7.1.0';
$moodlerequirementchanged = '3.7';
if (version_compare(PHP_VERSION, $minimumversion) < 0) {
if ($haltexecution) {
$error = "Moodle ${moodlerequirementchanged} or later requires at least PHP ${minimumversion} "
. "(currently using version " . PHP_VERSION .").\n"
. "Some servers may have multiple PHP versions installed, are you using the correct executable?\n";
// Our CLI scripts define CLI_SCRIPT before running this test, so make use of
// to send error on STDERR.
if (defined('CLI_SCRIPT') && defined('STDERR')) {
fwrite(STDERR, $error);
} else {
echo $error;
}
exit(1);
} else {
return false;
}
}
return true;
}
// DO NOT ADD EXTRA FUNCTIONS TO THIS FILE!!
// This file must be functioning on all versions of PHP, extra functions belong elsewhere.