3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class a { public $a = " test a! "; static public $b = " test b! "; public function __toString() { return '[class a]'; } } $a = new a(); $b = "a"; $line = 0; echo $line++, $$b; echo $line++, $a::b; //echo $line++, $$b->a; //echo $line++, $$b->b; //echo $line++, $$b::$b; // ERROR //echo $line++, $$b::b; // ERROR
Output for 7.0.0 - 7.1.0
0[class a]1 Fatal error: Uncaught Error: Undefined class constant 'b' in /in/9MvLP:20 Stack trace: #0 {main} thrown in /in/9MvLP on line 20
Process exited with code 255.
Output for hhvm-3.12.0
0[class a]1 Fatal error: Uncaught Error: Couldn't find constant a::b in /in/9MvLP:20 Stack trace: #0 {main}
Process exited with code 255.
Output for hhvm-3.10.0
0[class a]1 Fatal error: Couldn't find constant a::b in /in/9MvLP on line 20
Process exited with code 255.
Output for 5.3.0 - 5.6.28
0[class a]1 Fatal error: Undefined class constant 'b' in /in/9MvLP on line 20
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM, expecting ',' or ';' in /in/9MvLP on line 20
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_PAAMAYIM_NEKUDOTAYIM, expecting ',' or ';' in /in/9MvLP on line 20
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/9MvLP on line 6
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/9MvLP on line 6
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/9MvLP on line 6
Process exited with code 255.