$esr_releases */ public static array $esr_releases = [10, 17, 24, 31, 38, 45, 52, 60, 68, 78, 91, 102, 115, 128, 140]; /** * Get the ESR release that corresponds to the Rapid release version. * Return null if there is none. */ public static function getVersion(int $version): ?string { // We don't have an older ESR than the first ESR if ($version < 10) { return null; } // For very future versions, safeguard to ESR + 13 versions if ($version > self::$esr_releases[count(self::$esr_releases)-1] + 13) { return null; } $match = self::$esr_releases[0]; foreach (self::$esr_releases as $esr) { if ($esr > $version) { break; } if ($esr <= $version) { $match = $esr; } } return (string) $match . '.' . ($version - $match) . '.0'; } /** * Get the previous ESR release that corresponds to the Rapid release version * and that is still supported. Return null if there is none. */ public static function getOlderSupportedVersion(int $version): ?string { $current_ESR = self::getVersion($version); // We can't find a matching ESR, return now to avoid PHP warnings if (is_null($current_ESR)) { return null; } $current_ESR = Version::getMajor($current_ESR); // We don't have an older ESR than the first ESR if (self::$esr_releases[0] == $current_ESR) { return null; } $previous_ESR = self::$esr_releases[ array_search( $current_ESR, self::$esr_releases )-1 ]; /* 1. We support 2 ESR branches for 3 releases only since Version 68. 2. Before that, we had 2 cycles only with 2 ESR branches as cycles lasted longer 3. We extended the 115 ESR cycle because of a still large Windows 7/8.1 population */ $esr_minor_releases = match(true) { $version < 78 => 1, $current_ESR === 128 => 11, default => 2, }; if (($version - $current_ESR) > $esr_minor_releases) { return null; } return (string) $previous_ESR . '.' . ($version - $previous_ESR) . '.0'; } /** * Get the ESR 115 release that corresponds to the Rapid release version * and that is still supported. Return an empty string if there is none. * This method should be removed when we stop supporting the ESR 115 branch */ public static function getWin7SupportedVersion(int $version): string { /* We should ship our last ESR 115 with Firefox 142 */ if ($version > 142) { return ''; } return (string) '115.' . ($version - 115) . '.0'; } /** * Get a XX.YY version number from a full ESR number like 91.4.1esr * We drop the dot release part */ public static function getMainDotVersion(?string $version): string { // This is a safety net as we may loop on a range with a version we didn't ship if (is_null($version)) { return ''; } $version = explode('.', $version); array_pop($version); return implode('.', $version); } }