How do I convert datetime to ISO 8601 in PHP

Question

How do I convert my time from 2010-12-30 23:21:46 to ISO 8601 date format? (-_-;)

Answer 1

How to convert from ISO 8601 to unixtimestamp :

strtotime('2012-01-18T11:45:00+01:00');
// Output : 1326883500

How to convert from unixtimestamp to ISO 8601 (timezone server) :

date_format(date_timestamp_set(new DateTime(), 1326883500), 'c');
// Output : 2012-01-18T11:45:00+01:00

How to convert from unixtimestamp to ISO 8601 (GMT) :

date_format(date_create('@'. 1326883500), 'c') . "\n";
// Output : 2012-01-18T10:45:00+00:00

How to convert from unixtimestamp to ISO 8601 (custom timezone) :

date_format(date_timestamp_set(new DateTime(), 1326883500)->setTimezone(new DateTimeZone('America/New_York')), 'c');
// Output : 2012-01-18T05:45:00-05:00