@ 2014-08-24T16:34:24Z <?php
/**
* test that filemtime() returns Unix timestamp (UTC) on current system
*
* @link
*/
$nowHour = isset($_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();
}
}
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Output for 5.6.28 , 7.0.14 - 7.0.20 , 7.1.0 - 7.1.20 , 7.2.0 - 7.2.6 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 1462399200, is 1462399200.
The mtime represents Thu, 05 May 2016 00:00:00 +0200
Output for 4.3.0 - 4.3.11 , 4.4.0 - 4.4.9 , 5.0.0 - 5.0.5 , 5.1.0 - 5.1.6 , 5.2.0 - 5.2.17 , 5.3.0 - 5.3.29 , 5.4.0 - 5.4.45 , 5.5.0 - 5.5.37 , 5.6.0 - 5.6.23 , 7.0.0 - 7.0.8 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
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