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<?php class User{ protected $activeProducts = null; protected $pdo; public function __construct(PDO $pdo = null){ $this->pdo = $pdo; } public function getProducts(){ if($this->activeProducts){ echo "getting from property (cache)\n"; return $this->activeProducts; } //$this->activeProducts = $this->pdo... a long task echo "getting from db\n"; $this->activeProducts = ['fake','products']; return $this->activeProducts; } } $user = new User(null);//for tests var_dump($user->getProducts()); var_dump($user->getProducts());
Output for 5.6.0 - 5.6.40, 7.0.0 - 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
getting from db array(2) { [0]=> string(4) "fake" [1]=> string(8) "products" } getting from property (cache) array(2) { [0]=> string(4) "fake" [1]=> string(8) "products" }
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 getting from db array(2) { [0]=> string(4) "fake" [1]=> string(8) "products" } getting from property (cache) array(2) { [0]=> string(4) "fake" [1]=> string(8) "products" }
preferences:
244.77 ms | 402 KiB | 287 Q