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run code in 300+ PHP versions simultaneously
<?php class x { private $p = 'secret'; function RetVal(){ return $this->p; } } $f = function() { return (new x)->RetVal(); }; echo $f(),"\n"; $g = function(){ return $this->p; }; $nu = $g->bindto((new x), "x"); echo $nu(),"\n"; echo $g->call((new x));
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
secret secret secret
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
secret secret Fatal error: Call to undefined method Closure::call() in /in/0ZogT on line 18
Process exited with code 255.

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