3v4l.org

run code in 500+ PHP versions simultaneously
<?php class Dummy { private string $prop; public function __set($name, $value) { echo "Property '$name' in undeclared!\n"; $this->$name = $value; } } $dummy = new Dummy; $dummy->prop = 'Hello'; $dummy->prop .= ' world'; echo "{$dummy->prop}\n"; unset($dummy->prop); $dummy->prop = 'Hello'; $dummy->prop .= ' world'; echo "{$dummy->prop}\n";
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
Property 'prop' in undeclared! Fatal error: Uncaught Error: Cannot access private property Dummy::$prop in /in/ZnWbm:15 Stack trace: #0 {main} thrown in /in/ZnWbm on line 15
Process exited with code 255.
preferences:
30.51 ms | 1137 KiB | 7 Q