3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { private $bar = '120'; public function __sleep() { return [$this->bar, 240]; } } $obj = new Foo(); echo serialize($obj);
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
Warning: serialize(): "120" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 Warning: serialize(): Foo::__sleep() should return an array only containing the names of instance-variables to serialize in /in/UppOF on line 14 Warning: serialize(): "240" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 O:3:"Foo":0:{}
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 Warning: serialize(): "120" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 Warning: serialize(): Foo::__sleep() should return an array only containing the names of instance-variables to serialize in /in/UppOF on line 14 Warning: serialize(): "240" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 O:3:"Foo":0:{}
Output for 7.0.0 - 7.0.5, 7.4.2 - 7.4.33
Notice: serialize(): "120" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 Notice: serialize(): __sleep should return an array only containing the names of instance-variables to serialize. in /in/UppOF on line 14 Notice: serialize(): "240" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 O:3:"Foo":2:{s:3:"120";N;s:3:"240";N;}
Output for 7.0.6 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.1
Notice: serialize(): __sleep should return an array only containing the names of instance-variables to serialize. in /in/UppOF on line 14 Notice: serialize(): "120" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 Notice: serialize(): "240" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 O:3:"Foo":2:{s:3:"120";N;s:3:"240";N;}
Output for 7.3.32 - 7.3.33
O:3:"Foo":2:{s:3:"120";N;s:3:"240";N;}
Output for 5.6.8 - 5.6.40
Notice: serialize(): "120" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 Notice: serialize(): __sleep should return an array only containing the names of instance-variables to serialize. in /in/UppOF on line 14 Notice: serialize(): "240" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 O:3:"Foo":2:{s:3:"120";N;s:3:"240";R:2;}
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.7
Notice: serialize(): "120" returned as member variable from __sleep() but does not exist in /in/UppOF on line 14 Notice: serialize(): __sleep should return an array only containing the names of instance-variables to serialize. in /in/UppOF on line 14 O:3:"Foo":2:{s:3:"120";N;N;}

preferences:
254.65 ms | 402 KiB | 334 Q