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run code in 300+ PHP versions simultaneously
<?php class foo { public $bar = 'baz'; } $x = 'foo'; $o = new foo(); echo $o->$x; echo $o->{$x};
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined property: foo::$foo in /in/KkJ0s on line 9 Warning: Undefined property: foo::$foo in /in/KkJ0s on line 10

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