3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A{ public string $x; } $A = new A; var_dump(property_exists($A,'x'));//true var_dump($A); //class A#1 (1) {} // - it counts the property, but hides it var_dump(new stdClass()); //class stdClass#1 (0) {} - empty object
based on vjSWN
Output for 7.4.0 - 7.4.10, 8.0.0alpha1 - beta3
bool(true) object(A)#1 (0) { ["x"]=> uninitialized(string) } object(stdClass)#2 (0) { }
Output for 7.1.26 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.21
Parse error: syntax error, unexpected 'string' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in /in/gvDf5 on line 4
Process exited with code 255.