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run code in 150+ php & hhvm versions
Bugs & Features
<?php $obj = (object)array('123' => '456'); $obj->a = 1; print_r($obj); echo $obj->{'123'},"\n"; echo $obj->{123},"\n"; if (isset($obj->a)) { echo 'a is set';} if (isset($obj->{'123'})) { echo '123 is set';}
based on 3tsoA
Output for 5.2.6 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
stdClass Object ( [123] => 456 [a] => 1 ) Notice: Undefined property: stdClass::$123 in /in/3m8Fa on line 6 Notice: Undefined property: stdClass::$123 in /in/3m8Fa on line 7 a is set
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.2.5
stdClass Object ( [123] => 456 [a] => 1 ) Notice: Undefined property: stdClass::$123 in /in/3m8Fa on line 6 Notice: Undefined property: stdClass::$123 in /in/3m8Fa on line 7 a is set
Output for 4.3.3 - 4.4.9
Fatal error: Property name must be a string in /in/3m8Fa on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.2
stdClass Object ( [123] => 456 [a] => 1 ) 456
Process exited with code 139.