common/compatibility/checker.php

   1 <?php
   2 /**
   3  * This class is responsible for checking if the server's PHP version is compatible with OpenEMR.
   4  *
   5  * Note that this will only be used within setup.php, sql_upgrade.php,
   6  * sql_patch.php, acl_upgrade.php, admin.php, and globals.php.
   7  *
   8  * Copyright (C) 2017 Matthew Vita <matthewvita48@gmail.com>
   9  *
  10  * LICENSE: This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program. If not, see <http://opensource.org/licenses/gpl-license.php>.
  20  *
  21  * @package OpenEMR
  22  * @author  Matthew Vita <matthewvita48@gmail.com>
  23  * @link    http://www.open-emr.org
  24  */
  25
  26 // No namespace here because this class is mostly required outside of the
  27 // OpenEMR context.
  28
  29 class Checker {
  30     private static $minimumPhpVersion = "5.4.0";
  31
  32     private static function xlDelegate($value) {
  33         if (function_exists("xl")) {
  34             return xl($value);
  35         }
  36
  37         return $value;
  38     }
  39
  40     /**
  41      * Checks to see if minimum PHP version is met.
  42      *
  43      * @return bool | warning string
  44      */
  45     public static function checkPhpVersion() {
  46         $phpCheck = self::isPhpSupported();
  47         $response = "";
  48
  49         if (!$phpCheck) {
  50             $response .= self::xlDelegate("PHP version needs to be at least") . " " . self::$minimumPhpVersion . ".";
  51         } else {
  52             $response = true;
  53         }
  54
  55         return $response;
  56     }
  57
  58     /**
  59      * Checks to see if minimum PHP version is met.
  60      *
  61      * @return bool
  62      */
  63     private static function isPhpSupported() {
  64         return version_compare(phpversion(), self::$minimumPhpVersion, ">=");
  65     }
  66 }