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See Also ¶ get_declared_interfaces () - Returns an array of all declared interfaces class_implements () - Return the interfaces which are implemented by the given class or interface class_exists () - Checks if the class has been defined enum_exists () - Checks if the enum has been defined
Jul 23, 2025 · Return Value: If the given interface is defined, then it returns "true", otherwise it will return "false". Example 1: In this example, we will check interface is defined or not by using the interface_exists () function.
The PHP Class/Object interface_exists () function is used to check if a given interface is defined or not. It returns true if the interface exists and false otherwise.
PHP 5 >= 5.0.2, PHP 7, PHP 8 interface_exists - Checks if the interface has been defined Manual Code Examples
La fonction interface_exists vérifie si l'interface spécifiée existe dans la portée actuelle. Elle accepte comme premier paramètre le nom de l'interface sous forme de chaîne de caractères, et comme second paramètre optionnel - un drapeau indiquant s'il faut utiliser le chargement automatique des classes.
interface_exists () function in PHP The interface_exists () function checks if the interface has been defined. It returns TRUE if the interface given by name_of_interface has been defined, else FALSE is returned.
PHP Function interface_exists () - A simple and short PHP tutorial and complete reference manual for all built-in PHP functions. This tutorial is designed for beginners to advanced developers.
