3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { private $_b; function __construc($b) { $this->_b = $b; } function __get($name) { echo "get $name \n"; return $this->{'_' . $name}; } function __isset($name) { echo "isset $name\n"; return true; } } class B { private $_c; function __construc($c) { $this->_c = $c; } function __get($name) { echo "get $name \n"; return $this->{'_' . $name}; } function __isset($name) { echo "isset $name\n"; return true; } } $c = new B('plop'); $b = new B($c); $a = new A($b); var_dump(isset($a->b->c));
Output for 7.0.6 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
isset b get b 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 isset b get b bool(false)
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.5
get b bool(false)

preferences:
221.4 ms | 402 KiB | 287 Q