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run code in 150+ php & hhvm versions
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<?php $arr = array("test",array("one"=>1,"two"=>2,"three"=>3), array("one"=>1,"two"=>2,"three"=>3)); $o = new ArrayObject($arr); echo $o->offsetGet(2)["two"],"\n"; foreach ($o as $key=>$val){ if (is_array($val)) { foreach($val as $k => $v) { echo $k . ' => ' . $v,"\n"; } } else { echo $val,"\n"; } }
based on LLAB0
Output for 5.4.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
2 test one => 1 two => 2 three => 3 one => 1 two => 2 three => 3
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ',' or ';' in /in/Y9MFE on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ',' or ';' in /in/Y9MFE on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `','' or `';'' in /in/Y9MFE on line 4
Process exited with code 255.