Sometimes you want to check if a string represents a valid timezone. Using PHP versions greater than 5.2, timezone_identifiers_list() could be a solution.
Take a look in the following function:
<?php /** * Check if a string is a valid timezone * * timezone_identifiers_list() requires PHP >= 5.2 * * @param string $timezone * @return bool */ function isValidTimezone($timezone) { return in_array($timezone, timezone_identifiers_list()); } ?>
References
From PHP manual
- timezone_identifiers_list() (PHP 5 >= 5.2.0)
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