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run code in 150+ php & hhvm versions
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<?php echo 'lol:'; var_dump('lol'); echo 'mdr:'; var_dump('mdr');
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
lol:string(3) "lol" mdr:string(3) "mdr"