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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 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.13, 8.1.15 - 8.1.27, 8.2.0, 8.2.2 - 8.2.17, 8.3.0 - 8.3.4
valid
Output for 8.1.14, 8.2.1
not valid
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Fatal error: Class 'DateTimeZone' not found in /in/5nbMG on line 8
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '{' in /in/5nbMG on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected '{' in /in/5nbMG on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/5nbMG on line 7
Process exited with code 255.

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