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@ 2015-04-01T20:56:36Z

<?php

class test {
	const PRODUCTION  = 20;
    public static $environment = 10;
}
test::$environment = constant('test::'.strtoupper('production'));
echo (test::$environment);

Output
Performance
VLD
References
Branches

strtoupper: documentation ( source)
constant: documentation ( source)

preferences:dark modelive preview

37.85 ms | 402 KiB | 5 Q