Illustrations::Dynamically Accessing const class variable in PHP

constant access.php

<?php

class RegionVO {
    const NSW = 35;
    const ACT = 37;
    const VIC = 38;
    const QLD = 9;
    const SA = 36;
    const WA = 39;
    const NT = 40;
    const TAS = 26;
    
    public static function getID($alias) {
        $field = (string)strtoupper($alias);
        return constant('RegionVO::'.$field);
    }
}

echo RegionVO::getID('VIC').PHP_EOL;
echo RegionVO::getID('QLD').PHP_EOL;

?>