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run code in 200+ php & hhvm versions
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<?php $outer = function () { echo "Outer<br>"; $times = 0; $inner = function() use ($times){ echo "Inner : ${times}<br>"; $times++; if ( $times <= 2 ){ $callee = get_callee(); $callee(); } }; return $inner; }; $inner = $outer(); $inner(); ?>
Output for 7.0.0 - 7.3.0alpha1
Outer<br>Inner : 0<br> Fatal error: Uncaught Error: Call to undefined function get_callee() in /in/CCV7m:10 Stack trace: #0 /in/CCV7m(20): {closure}() #1 {main} thrown in /in/CCV7m on line 10
Process exited with code 255.
Output for 5.3.0 - 5.6.28
Outer<br>Inner : 0<br> Fatal error: Call to undefined function get_callee() in /in/CCV7m on line 10
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/CCV7m on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/CCV7m on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/CCV7m on line 2
Process exited with code 255.