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run code in 150+ php & hhvm versions
Bugs & Features
<?php $obj = (object)array('apple' => '456'); var_dump($obj); var_dump($obj->{'123'}); // Notice: Undefined property: stdClass::$123 var_dump($obj->{123}); // Notice: Undefined property:stdClass::$123
based on 6hQq8
Output for 5.2.6 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
object(stdClass)#1 (1) { ["apple"]=> string(3) "456" } Notice: Undefined property: stdClass::$123 in /in/DfGFf on line 4 NULL Notice: Undefined property: stdClass::$123 in /in/DfGFf on line 5 NULL
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.2.5
object(stdClass)#1 (1) { ["apple"]=> string(3) "456" } Notice: Undefined property: stdClass::$123 in /in/DfGFf on line 4 NULL Notice: Undefined property: stdClass::$123 in /in/DfGFf on line 5 NULL
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/DfGFf on line 5
Process exited with code 255.
Output for 4.3.3 - 4.4.9
Fatal error: Property name must be a string in /in/DfGFf on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.2
object(stdClass)(1) { ["apple"]=> string(3) "456" } Notice: Undefined property: 123 in /in/DfGFf on line 4 NULL
Process exited with code 139.