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run code in 150+ php & hhvm versions
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<?php var_dump('1e2' == 100); var_dump('a' == a);
based on Z3pqD
Output for 4.3.0 - 7.1.0
bool(true) Notice: Use of undefined constant a - assumed 'a' in /in/bT9WY on line 4 bool(true)