Introduction to PHP: A Useful Example
Example 2: "Last Modified" Date
Let's say we want to display the date the document was last modified on the page.
This can be accomplished using PHP as shown in this example.
I have uploaded a file called example2.php. Its contents are shown below.
This page was last modified
// Print the date this script was last modified
echo date("l F j, Y", filemtime($_SERVER["SCRIPT_FILENAME"]));
See Example 2.
Computer Science types will have no problem getting a hang of what is going on here.
The script within the <?php ?> tag was constructed as follows.
Please see the PHP Manual for more details about each function.
- The echo command displays the string returned by date().
- The date(format_string, time) function returns a string containing time returned by filemtime() formatted according to format_string.
- The date format string "l F j, Y" breaks down to
- l = Weekday
- F = Month
- j = Day of the month
- Y = Year
- The filemtime(filename) function returns the time the file whose name is contained by filename, in our case $_SERVER["SCRIPT_FILENAME"], was last modified.
- The $_SERVER["SCRIPT_FILENAME"] variable contains the filename of the currently executing script.
Even if you don't really care how Example 2 works, you can copy and paste the <?php ?> tag into your PHP document to use it.
| Contact EMU | Site
Map | Directories
| Calendars | My.emich