11-30-2006
I think you want to check the FAQ and look for datecalc - it's a script that does date arithmetic.
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Hi,
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input
a 1
a 2
a -1
b 1
b 2
b 3
output
a -1
b 1
Thanx
---------- Post updated at 09:42 PM ---------- Previous update was at 09:10 PM ----------
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LEARN ABOUT PHP
date_default_timezone_set
DATE_DEFAULT_TIMEZONE_SET(3) 1 DATE_DEFAULT_TIMEZONE_SET(3)
date_default_timezone_set - Sets the default timezone used by all date/time functions in a script
SYNOPSIS
bool date_default_timezone_set (string $timezone_identifier)
DESCRIPTION
date_default_timezone_set(3) sets the default timezone used by all date/time functions.
Note
Since PHP 5.1.0 (when the date/time functions were rewritten), every call to a date/time function will generate a E_NOTICE if the
timezone isn't valid, and/or a E_WARNING message if using the system settings or the $TZ environment variable.
Instead of using this function to set the default timezone in your script, you can also use the INI setting date.timezone to set the
default timezone.
PARAMETERS
o $timezone_identifier
- The timezone identifier, like UTC or Europe/Lisbon. The list of valid identifiers is available in the "List of Supported Time-
zones".
RETURN VALUES
This function returns FALSE if the $timezone_identifier isn't valid, or TRUE otherwise.
EXAMPLES
Example #1
Getting the default timezone
<?php
date_default_timezone_set('America/Los_Angeles');
$script_tz = date_default_timezone_get();
if (strcmp($script_tz, ini_get('date.timezone'))){
echo 'Script timezone differs from ini-set timezone.';
} else {
echo 'Script timezone and ini-set timezone match.';
}
?>
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.3.0 | |
| | |
| | Now throws E_WARNING rather than E_STRICT. |
| | |
| 5.1.2 | |
| | |
| | The function started to validate the $time- |
| | zone_identifier parameter. |
| | |
+--------+---------------------------------------------------+
SEE ALSO
date_default_timezone_get(3), "List of Supported Timezones".
PHP Documentation Group DATE_DEFAULT_TIMEZONE_SET(3)