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run code in 200+ php & hhvm versions
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<?php class IsolatedTest { protected $closure; public function __construct($closure) { $this->closure = $closure; } public function __invoke() { call_user_func($this->closure); } } class Test { public function testing(callable $what) { return Closure::bind($what, $this, $this); } } $test = new IsolatedTest(function () { echo 'This can be forked and called.'; }); $more = (new Test)->testing($test); var_dump($more);
based on dfgbF
Output for 5.4.0 - 7.2.0
Warning: Closure::bind() expects parameter 1 to be Closure, object given in /in/usUfQ on line 22 NULL
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/usUfQ on line 30
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/usUfQ on line 26
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/usUfQ on line 26
Process exited with code 255.
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/usUfQ on line 5
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/usUfQ on line 5
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/usUfQ on line 5
Process exited with code 255.