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Date and Time and sorting em in PHP
Additional PHP Material example from a Well House Consultants training course
More on Additional PHP Material [link]

This example is described in the following article(s):
   • More PHP sample and demonstration programs - [link]

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Source code: dademo.php Module: H999

# For demo - some data that we will test with

$stuff =  <<<COURSES
flipper - - [15/Jul/1998:13:02:47 -0400] "GET /pub/graham/ HTTP/1.0" 200 6906
sardine - - [21/Jul/1998:09:12:51 -0400] "GET /pub/bashful/page53 HTTP/1.0" 404 -
magnet - - [15/Jul/1998:13:02:48 -0400] "GET /pub/graham/wellho.gif HTTP/1.0" 200 16805
skate - - [21/Jul/1998:09:06:17 -0400] "GET /cgi-bin/pub/grumpy/trythis.pl HTTP/1.0" 200 36
magnet - - [05/Aug/1998:08:31:10 -0400] "GET /honeymoon/Pic116.jpg HTTP/1.0" 200 35248
flipper - - [05/Aug/1998:12:36:00 -0400] "GET /honeymoon/117.html HTTP/1.0" 200 351
lecht - - [28/Jan/1999:08:40:33 +0000] "GET /index.html HTTP/1.0" 200 1476
seal - - [28/Jan/1999:09:31:18 +0000] "GET / HTTP/1.0" 304 0
sealion - - [18/Jul/1998:02:27:19 -0400] "GET / HTTP/1.0" 304 0
skate - - [21/Jul/1998:09:06:47 -0400] "GET /cgi-bin/pub/grumpy/trythis.pl HTTP/1.0" 200 65
sardine - - [21/Jul/1998:09:12:38 -0400] "GET /www/pub/bashful/page53 HTTP/1.0" 404 -

# Date in yukky format to Unix timestamp
function gdate($record) {
$yikes + (strpos("JanFebMarAprMayJunJulAugSepOctNovDec",
$gotten[2]))/3# Date "Alpha Triplet" to Month No.
$when mktime($gotten[4],$gotten[5],$gotten[6],

bydate($left,$right) {
$whenone gdate($left);
$whentwo gdate($right);
        if (
$whenone == $whentwo) return 0;
        return ((
$whenone $whentwo) ? -: +1);

bylen($left,$right) {
$rv strlen($left) - strlen($right);

$records explode("\n",$stuff);
sort ($records);
$result implode("<br />",$records);
"<hr> Normal sort</br>$result";

rsort ($records);
$result implode("<br />",$records);
"<hr> Reverse sort</br>$result";

usort ($records,bylen);
$result implode("<br />",$records);
"<hr> User defined sort - by line length</br>$result";

usort ($records,bydate);
$result implode("<br />",$records);
"<hr> User defined sort - by date stamp</br>$result";

# Redisplay records with timestamp for adding to database

print "<hr>Added Date format is a demo of the date func. </br>";
foreach (
$records as $insertinfo) {
$utstamp gdate($insertinfo);
$fordb date("Y-m-d:His",$utstamp);
"$fordb .. $insertinfo<br>";


Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in PHP
 * PHP Programming
 * PHP Programming
 * Learning to program in PHP
Also available on on site courses for larger groups

Books covering this topic
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Other Examples
This example comes from our "Additional PHP Material" training module. You'll find a description of the topic and some other closely related examples on the "Additional PHP Material" module index page.

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