3v4l.org

run code in 300+ PHP versions simultaneously
<?php class a { function __construct() { } function __invoke() { echo("Invoked\n"); } } $a = new a(); $a(); // Prints: Invoked class b { private $x; function __construct() { $this->x = new a(); $this->x(); } } $b = new b();
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.27, 7.4.0 - 7.4.16, 8.0.0 - 8.0.3
Invoked Fatal error: Uncaught Error: Call to undefined method b::x() in /in/3Pu60:17 Stack trace: #0 /in/3Pu60(21): b->__construct() #1 {main} thrown in /in/3Pu60 on line 17
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Invoked Fatal error: Call to undefined method b::x() in /in/3Pu60 on line 17
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Fatal error: Function name must be a string in /in/3Pu60 on line 9
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/3Pu60 on line 13
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/3Pu60 on line 13
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/3Pu60 on line 13
Process exited with code 255.