PHP/Date/localtime

Changing time zone with an environment variable

 
<?php
putenv("TZ=PST8PDT");
$california_time_parts = localtime();
?>

Finding time parts

 
<?php
$now_1 = getdate();
$now_2 = localtime();
print "{$now_1["hours"]}:{$now_1["minutes"]}:{$now_1["seconds"]}\n";
print "$now_2[2]:$now_2[1]:$now_2[0]";
?>

Return array from localtime( )

 
Numeric         position            Key Value
0               tm_sec              Second
1               tm_min              Minutes
2               tm_hour             Hour
3               tm_mday             Day of the month
4               tm_mon              Month of the year (January is 0)
5               tm_year             Years since 1900
6               tm_wday             Day of the week (Sunday is 0)
7               tm_yday             Day of the year
8               tm_isdst            Is daylight savings time in effect?

Simple time zone calculation

 
<?php
$time_parts = localtime();
$california_time_parts = localtime(time() - 3 * 3600);
?>

Using localtime()

 
<?php
$a = localtime();
$a[4] += 1;
$a[5] += 1900;
print "$a[4]/$a[3]/$a[5]";