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<?php class F { private string $bar; public function __construct(private string $foo, string $bar){ $this->bar = $bar; } public function __sleep(): array { return array_keys(get_object_vars($this)); } public function getFoo():string { return $this->foo; } public function getBar():string { return $this->bar; } } $g = new F('this is a private variable', 'so is this'); class G extends F {} $s = serialize($g); var_export($s); $n = unserialize($s); echo \PHP_EOL; echo $n->getFoo(); echo \PHP_EOL; echo $n->getBar(); $h = new G('This is an extension', 'of the other one'); $s = serialize($h); echo \PHP_EOL; var_export($s); $n = unserialize($s); echo \PHP_EOL; echo $n->getFoo(); echo \PHP_EOL; echo $n->getBar();
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
'O:1:"F":2:{s:6:"' . "\0" . 'F' . "\0" . 'bar";s:10:"so is this";s:6:"' . "\0" . 'F' . "\0" . 'foo";s:26:"this is a private variable";}' this is a private variable so is this Warning: serialize(): "bar" returned as member variable from __sleep() but does not exist in /in/d6WN9 on line 32 Warning: serialize(): "foo" returned as member variable from __sleep() but does not exist in /in/d6WN9 on line 32 'O:1:"G":0:{}' Fatal error: Uncaught Error: Typed property F::$foo must not be accessed before initialization in /in/d6WN9:13 Stack trace: #0 /in/d6WN9(37): F->getFoo() #1 {main} thrown in /in/d6WN9 on line 13
Process exited with code 255.
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
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