Using the getdate() function with no arguments:

After executing $d = getdate():
$d['year'] = 2026
Without using the quotes in the key:
$d[year] = 2026
$d['month'] = April
$d['mday'] = 2
$d['hours'] = 16
$d['wday'] = 4
$d['weekday'] = Thursday

Using the getdate() function with an argument:

After executing $e = getdate(filemtime("/home/abu-jeib/temp/a.txt")):
$e['year'] = 1970
$e['month'] = January
$e['mday'] = 1
$e['hours'] = 0
$e['wday'] = 4
$e['weekday'] = Thursday
Now Using the date() function with one argument:

date('r') = Thu, 02 Apr 2026 16:30:17 +0000
date('m/d/y') = 04/02/26
date('m-d-y') = 04-02-26
date('M d, y H:i:s T') = Apr 02, 26 16:30:17 UTC
date('D, M d, Y') = Thu, Apr 02, 2026
date('F jS, Y') =April 2nd, 2026
date('\T\h\e \i\m\e \i\s \o\w: H:i:s T') =The time is now: 16:30:17 UTC
date('The time is now: H:i:s T') =UTC04UTC 303004UTC 3017 420264: 16:30:17 UTC

Now Using the gmdate() function with one argument:

Note: gm stands for Greenwich Mean Time which is used in France and the UK.
gmdate('r') = Thu, 02 Apr 2026 16:30:17 +0000
gmdate('d/m/y') = 02/04/26
gmdate('d-m-y') = 02-04-26
gmdate('M d, y H:i:s T') = Apr 02, 26 16:30:17 GMT
gmdate('D, M d, Y') = Thu, Apr 02, 2026
gmdate('jS F Y') =2nd April 2026

Now using a second argument for the date() function:

The last modified date of the file "/home/abu-jeib/temp/a.txt" is printed in the format M d, y H:i:s

date('M d, y H:i:s',filemtime('/home/abu-jeib/temp/a.txt')) = Jan 01, 70 00:00:00

Now using a second argument for the gmdate() function:

The last modified date of the file "/home/abu-jeib/temp/a.txt" is printed in the format M d, y H:i:s

gmdate('M d, y H:i:s',filemtime('/home/abu-jeib/temp/a.txt')) = Jan 01, 70 00:00:00