3v4l.org

run code in 300+ PHP versions simultaneously
<?php class myClass { private $var = null; function __construct() { $this->var = "Hello"; } public function func() { $this->var = null; var_dump($this->var);// Does nothing, still "Hello" unset($this->var); var_dump($this->var);// Does nothing, still "Hello" $this->var = false; var_dump($this->var);// Works and prints "Hello" } } $c = new myClass; $c->func();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
NULL Warning: Undefined property: myClass::$var in /in/POdHF on line 15 NULL bool(false)
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 NULL Warning: Undefined property: myClass::$var in /in/POdHF on line 15 NULL bool(false)
Output for 7.3.0 - 7.3.31, 7.3.33, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
NULL Notice: Undefined property: myClass::$var in /in/POdHF on line 15 NULL bool(false)
Output for 7.3.32, 7.4.26
NULL NULL bool(false)
preferences:
143.89 ms | 401 KiB | 153 Q