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run code in 150+ php & hhvm versions
Bugs & Features
<?php class InCommon { private $baz = 'foo'; public function out($pref){ echo "\n".$pref.'::$baz = '.$this->baz; } } class Foo extends InCommon { public function out($pref){ echo "\n".$pref.'::$baz = '.$this->baz; } } class Bar extends InCommon { public function peek($target, $label){ echo "\n".'peek @'.$label.'::$baz = '.$target->baz; } public function mess($target){ $target->baz = 'cats'; } } $foo = new Foo(); $bar = new Bar(); $bar->mess($foo); $bar->peek($foo, 'Foo'); $bar->peek($bar, 'Foo'); $foo->out('Foo'); $bar->out('Bar');
based on rSjq5
Output for 5.2.6 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
peek @Foo::$baz = cats Notice: Undefined property: Bar::$baz in /in/dDaYT on line 17 peek @Foo::$baz = Foo::$baz = cats Bar::$baz = foo
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.2.5
peek @Foo::$baz = cats Notice: Undefined property: Bar::$baz in /in/dDaYT on line 17 peek @Foo::$baz = Foo::$baz = cats Bar::$baz = foo
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/dDaYT on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/dDaYT on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/dDaYT on line 3
Process exited with code 255.