property_exists
Vérifiez si un objet ou une classe a cette propriété
Nom de la fonction: propriété_exists ()
Description de la fonction: Property_exists () Fonction vérifie si un objet ou une classe a l'attribut spécifié.
paramètre:
Valeur de retour:
Version applicable: PHP 4, PHP 5, PHP 7
Exemple d'utilisation:
class MyClass { public $name = "John"; private $age = 25; } $object = new MyClass(); if (property_exists($object, 'name')) { echo "The 'name' property exists."; } else { echo "The 'name' property does not exist."; } // 输出:The 'name' property exists.
class MyClass { public $name = "John"; private $age = 25; } $object = new MyClass(); if (property_exists($object, 'age')) { echo "The 'age' property exists."; } else { echo "The 'age' property does not exist."; } // 输出:The 'age' property does not exist.
class MyClass { public static $name = "John"; private static $age = 25; } if (property_exists('MyClass', 'name')) { echo "The 'name' static property exists."; } else { echo "The 'name' static property does not exist."; } // 输出:The 'name' static property exists.
class MyClass { public static $name = "John"; private static $age = 25; } if (property_exists('MyClass', 'age')) { echo "The 'age' static property exists."; } else { echo "The 'age' static property does not exist."; } // 输出:The 'age' static property does not exist.