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PHP Function: Get timezone offset between two timezones in hours
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| function getTimezoneOffset(string $timezone1, string $timezone2): int { | |
| $dateTimezone1 = new DateTimeZone($timezone1); | |
| $dateTimezone2 = new DateTimeZone($timezone2); | |
| $timezoneOffset1 = (new DateTime('now', $dateTimezone1))->getOffset(); | |
| $timezoneOffset2 = (new DateTime('now', $dateTimezone2))->getOffset(); | |
| return ($timezoneOffset2 - $timezoneOffset1) / 3600; | |
| } | |
| getTimezoneOffset('America/Chicago', 'America/New_York'); // will return 1 | |
| getTimezoneOffset('America/Chicago', 'America/Los_Angeles'); // will return -2 |
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