date weirdness
| From: | Greg Donald | Date: | Tue, 18 Sep 2007 20:32:21 +0000 |
| Subject: | date weirdness | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-262218@lists.php.net to get a copy of this message | ||
I have extracted a small portion of a calendar application I developed
recently to show some strange behavior with the date() function. When I
run this I get duplicate dates occasionally down the list. I'm seeing
11/4 twice for example. Sometimes dates are missing from the list. The
results change from day to day.
#!/usr/bin/env php
<?php
error_reporting( E_ALL );
define( 'SECONDS_IN_A_DAY', 60 * 60 * 24 );
define( 'LAST_SUNDAY', strtotime( 'last Sunday' ) );
echo 'SECONDS_IN_A_DAY = ' . SECONDS_IN_A_DAY . "\n";
echo 'LAST_SUNDAY = ' . LAST_SUNDAY . "\n";
for( $x = 0; $x < 365; $x++ )
{
$seconds = LAST_SUNDAY + ( SECONDS_IN_A_DAY * $x );
$date = date( 'n/j', $seconds );
echo "$seconds $date\n";
}
I get the same results with latest PHP4 and PHP5.
--
Greg Donald
Cyberfusion Consulting
http://cyberfusionconsulting.com/