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run code in 150+ php & hhvm versions
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<?php class A { public function foo() { $f = function() { $name = "this"; var_dump($this->bar()); var_dump(${$name}->bar()); }; $f(); } public function bar() { return "bar"; }} $a = new A; $a->foo();
Output for 7.1.0
string(3) "bar" string(3) "bar"
Output for 7.0.0 - 7.0.14
string(3) "bar" Notice: Undefined variable: this in /in/ZJir1 on line 2 Fatal error: Uncaught Error: Call to a member function bar() on null in /in/ZJir1:2 Stack trace: #0 /in/ZJir1(2): A->{closure}() #1 /in/ZJir1(2): A->foo() #2 {main} thrown in /in/ZJir1 on line 2
Process exited with code 255.
Output for hhvm-3.12.0
string(3) "bar" Notice: Undefined variable: this in /in/ZJir1 on line 2 Fatal error: Uncaught exception 'BadMethodCallException' with message 'Call to a member function bar() on a non-object (null)' in /in/ZJir1:2 Stack trace: #0 /in/ZJir1(2): Closure$A::foo() #1 /in/ZJir1(2): A->foo() #2 {main}
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.6.8 - 5.6.28
string(3) "bar" Notice: Undefined variable: this in /in/ZJir1 on line 2 Fatal error: Call to a member function bar() on null in /in/ZJir1 on line 2
Process exited with code 255.
Output for 5.4.0 - 5.5.35
string(3) "bar" Notice: Undefined variable: this in /in/ZJir1 on line 2 Fatal error: Call to a member function bar() on a non-object in /in/ZJir1 on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Fatal error: Using $this when not in object context in /in/ZJir1 on line 2
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/ZJir1 on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/ZJir1 on line 2
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/ZJir1 on line 2
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/ZJir1 on line 2
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/ZJir1 on line 2
Process exited with code 255.