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run code in 300+ PHP versions simultaneously
<?php namespace My\NS; const STDIN = 'f00'; echo STDIN, PHP_EOL; echo \STDIN, PHP_EOL; namespace My\Other; echo STDIN, PHP_EOL; echo \My\NS\STDIN, PHP_EOL;
Output for git.master_jit, git.master
f00 Resource id #1 Resource id #1 f00

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