Online PHP editor | refs for IYGfR

@ 2014-04-25T10:58:15Z

<?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';
}