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run code in 200+ php & hhvm versions
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<?php $x = function($m){ return $this->waa();}; class x { function __construct($x){ var_dump(preg_replace_callback('~.~', $x, 'wazaa')); } function waa(){ return 'meukee'; } } new x($x);
based on t22aS
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Error: Using $this when not in object context in /in/ogvCZ:3 Stack trace: #0 [internal function]: {closure}(Array) #1 /in/ogvCZ(7): preg_replace_callback('~.~', Object(Closure), 'wazaa') #2 /in/ogvCZ(11): x->__construct(Object(Closure)) #3 {main} thrown in /in/ogvCZ on line 3
Process exited with code 255.
Output for 5.3.21 - 5.6.28
Fatal error: Using $this when not in object context in /in/ogvCZ on line 3
Process exited with code 255.