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<?php $tz_str = 'GMT+1'; if ( preg_match( '|^(?:GMT|UTC)([+\- ]\d+(?:\.\d+)?)$|', $tz_str, $matches ) ) { $tz_str = 'Etc/GMT' . $matches[1]; } try { $timezone = new DateTimeZone( $tz_str ); echo 'valid'; } catch ( Exception $excpt ) { echo 'not valid'; }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match(): Unknown modifier 'T' in /in/IYGfR on line 3 valid

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