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run code in 150+ php & hhvm versions
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<?php /** * test that filemtime() returns Unix timestamp (UTC) on current system */ $nowHour = isset($_SERVER['REQUEST_TIME']) ? $_SERVER['REQUEST_TIME'] : time(); $hostname = php_uname('n'); $formatRfc = 'D, d M Y H:i:s O'; $timestampStartOfUnixEpoch = 0; // start of the Unix epoch. $timestampRequest = 3600 * (int)($nowHour / 3600); $tempDir = function_exists('sys_get_temp_dir') ? sys_get_temp_dir() : '/tmp'; $testFile = sprintf('%s/%s', $tempDir, 'test-filemtime'); if ($hostname !== 'php_shell') { printf("PHP version is %s and OS is %s\n", PHP_VERSION, PHP_OS); } printf("Testfile is '%s'.\n", $testFile); touch($testFile, $timestampStartOfUnixEpoch); php_clearstatcache(false, $testFile); $mtime = filemtime($testFile); printf("Testfile '%s' mtime should be from touch %d, is %d.\n", basename($testFile), $timestampStartOfUnixEpoch, $mtime); printf("The mtime represents %s\n", date($formatRfc, $mtime)); touch($testFile, $timestampRequest); php_clearstatcache(false, $testFile); $mtime = filemtime($testFile); printf("Testfile '%s' mtime should be from touch %d, is %d.\n", basename($testFile), $timestampRequest, $mtime); printf("The mtime represents %s\n", date($formatRfc, $mtime)); unlink($testFile); /** * @param $clear_realpath_cache * @param $filename * @link http://php.net/manual/en/function.version-compare.php */ function php_clearstatcache($clear_realpath_cache, $filename) { if (version_compare(PHP_VERSION, '5.3.0') >= 0) { clearstatcache($clear_realpath_cache, $filename); } else { clearstatcache(); } }
Output for 4.3.0 - 5.6.28, 7.0.0 - 7.1.0
Testfile is '/tmp/test-filemtime'. Testfile 'test-filemtime' mtime should be from touch 0, is 0. The mtime represents Thu, 01 Jan 1970 01:00:00 +0100 Testfile 'test-filemtime' mtime should be from touch 1408896000, is 1408896000. The mtime represents Sun, 24 Aug 2014 18:00:00 +0200
Output for hhvm-3.12.0
Testfile is '/tmp/test-filemtime'. Testfile 'test-filemtime' mtime should be from touch 0, is 1474260747. The mtime represents Mon, 19 Sep 2016 06:52:27 +0200 Testfile 'test-filemtime' mtime should be from touch 1408896000, is 1408896000. The mtime represents Sun, 24 Aug 2014 18:00:00 +0200
Output for hhvm-3.10.0
Testfile is '/tmp/test-filemtime'. Testfile 'test-filemtime' mtime should be from touch 0, is 1474260745. The mtime represents Mon, 19 Sep 2016 06:52:25 +0200 Testfile 'test-filemtime' mtime should be from touch 1408896000, is 1408896000. The mtime represents Sun, 24 Aug 2014 18:00:00 +0200