Web Reference: Type declarations can be added to function arguments, return values, as of PHP 7.4.0, class properties, and as of PHP 8.3.0, class constants. They ensure that the value is of the specified type at call time, otherwise a TypeError is thrown. Feb 22, 2024 · Type declarations, also known as type hints, allow you to specify the expected type of a function’s arguments and return value. Starting with PHP 7, type declarations were extended to support scalar types (int, float, string, and bool), widening the possibilities for type checking. PHP version 7 extends the scalar type declaration feature to the return value of a function also. As per this new provision, the return type declaration specifies the type of value that a function should return.
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