Description
int 
filemtime ( string filename )
     Returns the time the file was last modified, or FALSE in case of
     an error. The time is returned as a Unix timestamp, which is
     suitable for the date() function.
    
Note: The results of this 
function are cached. See clearstatcache() for 
more details.
Tip: As of PHP 5.0.0 this function
can also be used with some URL wrappers.  Refer to 
Appendix M for a listing of which wrappers support 
stat() family of functionality.
     This function returns the time when the data
     blocks of a file were being written to, that is, the time
     when the content of the file was changed.
    
     
| Example 1. filemtime() example | 
<?php// outputs e.g.  somefile.txt was last modified: December 29 2002 22:16:23.
 
 $filename = 'somefile.txt';
 if (file_exists($filename)) {
 echo "$filename was last modified: " . date ("F d Y H:i:s.", filemtime($filename));
 }
 ?>
 | 
 | 
    
     See also filectime(), stat(),
     touch(), and getlastmod().