February 12, 2011 
Definition:
function iso8601_timezone_to_offset($timezone) {}
Computes an offset in seconds from an iso8601 timezone.
Parameters
- string $timezone: Either ‘Z’ for 0 offset or ‘±hhmm’.
Return values
returns:The offset in seconds.
Source code
function iso8601_timezone_to_offset($timezone) {
// $timezone is either 'Z' or '[+|-]hhmm'
if ($timezone == 'Z') {
$offset = 0;
} else {
$sign = (substr($timezone, 0, 1) == '+') ? 1 : -1;
$hours = intval(substr($timezone, 1, 2));
$minutes = intval(substr($timezone, 3, 4)) / 60;
$offset = $sign * 3600 * ($hours + $minutes);
}
return $offset;
}
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