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<?php class Foo { public $savethis; public $andthis; public $notthis; public function __construct($a, $b) { $this->savethis = $a; $this->andthis = $b; $this->notthis = microtime(true); } public function __sleep() { return ['savethis', 'andthis']; } public function __wakeup() { $this->notthis = microtime(true); } } $f = new Foo(1, 2); var_dump($f, $g = serialize($f), unserialize($g));
Output for 5.6.0, 5.6.2, 5.6.5, 5.6.7 - 5.6.8, 5.6.22 - 5.6.23, 5.6.25, 5.6.28, 5.6.38, 7.1.1, 7.1.12, 7.1.20, 7.1.22, 7.2.21, 7.4.1
object(Foo)#1 (3) { ["savethis"]=> int(1) ["andthis"]=> int(2) ["notthis"]=> float(1507899343.0002) } string(51) "O:3:"Foo":2:{s:8:"savethis";i:1;s:7:"andthis";i:2;}" object(Foo)#2 (3) { ["savethis"]=> int(1) ["andthis"]=> int(2) ["notthis"]=> float(1507899343.0003) }
Output for 5.6.1, 5.6.3 - 5.6.4, 5.6.6, 5.6.9 - 5.6.12, 5.6.15 - 5.6.18, 5.6.21, 5.6.24, 5.6.29 - 5.6.34, 5.6.36, 5.6.39 - 5.6.40, 7.0.1 - 7.0.2, 7.0.5, 7.0.9 - 7.0.10, 7.0.12 - 7.0.13, 7.0.15, 7.0.18 - 7.0.21, 7.0.23 - 7.0.24, 7.0.26 - 7.0.27, 7.0.29, 7.0.31, 7.1.0, 7.1.2 - 7.1.6, 7.1.8, 7.1.10 - 7.1.11, 7.1.13 - 7.1.14, 7.1.17 - 7.1.18, 7.1.23, 7.1.25, 7.1.29, 7.1.32, 7.2.0 - 7.2.1, 7.2.4, 7.2.10 - 7.2.11, 7.2.13, 7.2.16 - 7.2.20, 7.2.22 - 7.2.26, 7.3.0, 7.3.4 - 7.3.11, 7.4.0
object(Foo)#1 (3) { ["savethis"]=> int(1) ["andthis"]=> int(2) ["notthis"]=> float(1507899343.0002) } string(51) "O:3:"Foo":2:{s:8:"savethis";i:1;s:7:"andthis";i:2;}" object(Foo)#2 (3) { ["savethis"]=> int(1) ["andthis"]=> int(2) ["notthis"]=> float(1507899343.0002) }
Output for 5.6.13 - 5.6.14, 5.6.20, 7.0.22, 7.1.7, 7.1.30 - 7.1.31, 7.1.33, 7.3.13
object(Foo)#1 (3) { ["savethis"]=> int(1) ["andthis"]=> int(2) ["notthis"]=> float(1507899343.0003) } string(51) "O:3:"Foo":2:{s:8:"savethis";i:1;s:7:"andthis";i:2;}" object(Foo)#2 (3) { ["savethis"]=> int(1) ["andthis"]=> int(2) ["notthis"]=> float(1507899343.0003) }
Output for 5.6.19, 5.6.26 - 5.6.27, 5.6.35, 5.6.37, 7.0.0, 7.0.3 - 7.0.4, 7.0.8, 7.0.11, 7.0.14, 7.0.30, 7.0.33, 7.1.9, 7.1.21, 7.1.26, 7.1.28, 7.2.6, 7.2.8 - 7.2.9, 7.2.15, 7.3.1 - 7.3.3, 7.3.12
object(Foo)#1 (3) { ["savethis"]=> int(1) ["andthis"]=> int(2) ["notthis"]=> float(1507899343.0001) } string(51) "O:3:"Foo":2:{s:8:"savethis";i:1;s:7:"andthis";i:2;}" object(Foo)#2 (3) { ["savethis"]=> int(1) ["andthis"]=> int(2) ["notthis"]=> float(1507899343.0002) }
Output for 7.0.6 - 7.0.7, 7.0.16 - 7.0.17, 7.0.25, 7.0.28, 7.0.32, 7.1.15 - 7.1.16, 7.1.19, 7.1.24, 7.1.27, 7.2.2 - 7.2.3, 7.2.5, 7.2.7, 7.2.12, 7.2.14
object(Foo)#1 (3) { ["savethis"]=> int(1) ["andthis"]=> int(2) ["notthis"]=> float(1507899343.0001) } string(51) "O:3:"Foo":2:{s:8:"savethis";i:1;s:7:"andthis";i:2;}" object(Foo)#2 (3) { ["savethis"]=> int(1) ["andthis"]=> int(2) ["notthis"]=> float(1507899343.0001) }

preferences:
53.39 ms | 1143 KiB | 4 Q