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run code in 150+ php & hhvm versions
Bugs & Features
<?php $obj = (object)array('123' => '456'); print_r($obj); echo $obj->{'123'},"\n"; echo $obj->{123},"\n"; echo property_exists(get_class($obj->{'123'}))? 'true':'false';
based on 4ljWt
Output for 5.3.1 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
stdClass Object ( [123] => 456 ) Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 5 Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 6 Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 7 Warning: get_class() called without object from outside a class in /in/PnsUF on line 7 Warning: property_exists() expects exactly 2 parameters, 1 given in /in/PnsUF on line 7 false
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0
stdClass Object ( [123] => 456 ) Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 5 Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 6 Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 7 Warning: get_class() expects parameter 1 to be object, null given in /in/PnsUF on line 7 Warning: property_exists() expects exactly 2 parameters, 1 given in /in/PnsUF on line 7 false
Output for 5.2.6 - 5.2.17
stdClass Object ( [123] => 456 ) Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 5 Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 6 Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 7 Warning: Wrong parameter count for property_exists() in /in/PnsUF on line 7 false
Output for 5.1.0 - 5.2.5
stdClass Object ( [123] => 456 ) Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 5 Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 6 Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 7 Warning: Wrong parameter count for property_exists() in /in/PnsUF on line 7 false
Output for 5.0.0 - 5.0.5
stdClass Object ( [123] => 456 ) Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 5 Notice: Undefined property: stdClass::$123 in /in/PnsUF on line 6 Fatal error: Call to undefined function property_exists() in /in/PnsUF on line 7
Process exited with code 255.
Output for 4.3.3 - 4.4.9
Fatal error: Property name must be a string in /in/PnsUF on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.2
stdClass Object ( [123] => 456 ) 456
Process exited with code 139.