3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class A { public function __construct() { var_dump(debug_backtrace(true)); } } class B { public function __construct() { new A(); } } new B;
based on gWWYd
Output for 5.2.5 - 7.2.0
array(2) { [0]=> array(7) { ["file"]=> string(9) "/in/VP8F0" ["line"]=> int(13) ["function"]=> string(11) "__construct" ["class"]=> string(1) "A" ["object"]=> object(A)#2 (0) { } ["type"]=> string(2) "->" ["args"]=> array(0) { } } [1]=> array(7) { ["file"]=> string(9) "/in/VP8F0" ["line"]=> int(17) ["function"]=> string(11) "__construct" ["class"]=> string(1) "B" ["object"]=> object(B)#1 (0) { } ["type"]=> string(2) "->" ["args"]=> array(0) { } } }
Output for 5.0.0 - 5.2.4
Warning: Wrong parameter count for debug_backtrace() in /in/VP8F0 on line 6 NULL
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/VP8F0 on line 4
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/VP8F0 on line 4
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/VP8F0 on line 4
Process exited with code 255.