Php has file related functions , which helps us to get complete details of the file creation and modification etc
// filemtime is a php function which gives us the last modified info of any file
$file_modified_on = date(“l, dS F, Y @ h:ia”,filemtime($path_to_file));
echo “File was modified on > “.$file_modified_on;
Syntax of filemtime()
int filemtime ( string $path_to_file )
Description of filemtime()
Function returns the modification time of specified file.