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MDL-57432 lib: unify PHP version checks
* Introduce a new php compatible library which can be used early in execution, without Moodle dependencies * Use it where we previously had hardcoded checks This was originally suggested in MDL-39007.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| <?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! | ||
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| /** | ||
| * 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 <[email protected]> | ||
| * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | ||
| */ | ||
|
|
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| /** | ||
| * 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); | ||
| } | ||
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| /** | ||
| * 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). | ||
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| $minimumversion = '5.6.5'; | ||
| $moodlerequirementchanged = '3.2'; | ||
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| 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"; | ||
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| // 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; | ||
| } | ||
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| // DO NOT ADD EXTRA FUNCTIONS TO THIS FILE!! | ||
| // This file must be functioning on all versions of PHP, extra functions belong elsewhere. |