PHP Obtenga la última fecha modificada del archivo
$filename = 'somefile.txt';
if (file_exists($filename)) {
echo "$filename last modified: ".date ("F d Y H:i:s.", filemtime($filename));
// somefile.txt was last changed: December 29 2020 22:16:23.
}
// filectime: when created
// filemtime: last modified
// fileatime: last accessed
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