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run code in 200+ php & hhvm versions
Bugs & Features
<?php $tab = []; for ($i = 0.12; $i < 1.02; $i =+ 0.12) { $tab[$i] = $i; } var_dump(count($tab));
Output for 5.4.1 - 7.2.0

Process exited with code 137.
Output for 5.3.14 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/YYQD7 on line 2
Process exited with code 255.