3v4l.org

run code in 300+ PHP versions simultaneously
<?php putenv("TEST=TEST"); $test = getenv("TEST"); echo "TEST = " .$test." "; putenv("TEST1=+$test"); $test1 = getenv("TEST1"); echo "TEST1 = " .$test1;

preferences:
69.66 ms | 402 KiB | 5 Q