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run code in 150+ php & hhvm versions
Bugs & Features
<?php ini_set('display_errors', 0); var_dump(o_O ^_^ O_o);
Output for 4.3.0 - 5.6.28, 7.0.0 - 7.1.0
string(1) ""
Output for hhvm-3.10.0 - 3.12.0
Notice: Use of undefined constant o_O - assumed 'o_O' in /in/D48g9 on line 3 Notice: Use of undefined constant _ - assumed '_' in /in/D48g9 on line 3 Notice: Use of undefined constant O_o - assumed 'O_o' in /in/D48g9 on line 3 string(1) ""