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- Interfaces are defined using the interface keyword.
- All methods declared in an interface must be public. Classes defined as Interface may not be instantiated(create object).
- To extend the interface class, implements operator is used.
- You can inherit number of interface class at the time of extending and number of abstract class separated by comma.
- All methods in the interface must be implemented within a child class; failure to do so will result in a fatal error.
- Interfaces can be extended like classes using the extends operator.
- The class implementing the interface must use the exact same method signatures as are defined in the interface. Not doing so will result in a fatal error.
- Type hint & number of parameter must be match.
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1Ah excellent! Thank you! - Arden Smith - 8 hours ago
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