Interface “%s” not found

Description

This error message is reported when the interface could not be loaded, or when the name of the class is invalid.

Example

<?php

// '4f' is not a valid name for an interface
('4f')::c;

// it is not possible to name a class 'interface'
('interface')::c;

?>

Literal Examples

Interface “4f” not found
Interface “interface” not found

Alternatives

Check spelling and namespace for that interface.
Create the required interface.
Check if the interface is defined in an extension, and the extension is included in the current PHP engine.
Check if the interface is defined in a dependency, and the dependency is included in the current composer.json.
Do not use static, parent or self in a string to call a method statically.

In previous PHP versions, this error message used to be :ref:interface-%s-cannot-implement-itself.