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Informations about the package phpresult
PHP Result Type Documentation
This documentation covers the implementation of a Rust-like Result Type for PHP. The Result type is used for returning and propagating errors. It has two variants: Ok, representing success and containing a value, and Err, representing error and containing an error value.
Table of Contents
- Result Interface
- Usage
- Methods
- Complementary Packages
- Static Analysis
- Contributing
- Security Vulnerabilities
- License
Result Interface
The Result interface defines the contract for both Ok and Err classes.
Usage
First Example
Second Example
Third Example
Fourth Example
Methods
isOk(): bool
Returns true if the result is Ok.
Example:
isOkAnd(callable $fn): bool
Returns true if the result is Ok and the value inside of it matches a predicate.
Example:
isErr(): bool
Returns true if the result is Err.
Example:
isErrAnd(callable $fn): bool
Returns true if the result is Err and the value inside of it matches a predicate.
Example:
ok(?string $className): mixed
Converts from Result<T, E> to Option<T>.
Example:
err(?string $className): mixed
Converts from Result<T, E> to Option<E>.
Example:
unwrap(): mixed
Returns the contained Ok value. Throws an exception if the value is an Err.
Example:
expect(string $msg): mixed
Returns the contained Ok value. Throws an exception with a provided message if the value is an Err.
Example:
expectErr(string $msg): mixed
Returns the contained Err value. Throws an exception with a provided message if the value is an Ok.
Example:
flatten(): Result
Converts from Result<Result<T, E>, E> to Result<T, E>.
Example:
intoErr(): mixed
Returns the contained Err value. Throws an exception if the value is an Ok.
Example:
intoOk(): mixed
Returns the contained Ok value. Throws an exception if the value is an Err.
Example:
iter(): Iterator
Returns an iterator over the possibly contained value.
Example:
unwrapOr(mixed $default): mixed
Returns the contained Ok value or a provided default.
Example:
unwrapOrElse(callable $fn): mixed
Returns the contained Ok value or computes it from a closure.
Example:
map(callable $fn): Result
Maps a Result<T, E> to Result<U, E> by applying a function to a contained Ok value, leaving an Err value untouched.
Example:
mapErr(callable $fn): Result
Maps a Result<T, E> to Result<T, F> by applying a function to a contained Err value, leaving an Ok value untouched.
Example:
mapOr(mixed $default, callable $fn): mixed
Returns the provided default (if Err), or applies a function to the contained value (if Ok).
Example:
mapOrElse(callable $default, callable $fn): mixed
Maps a Result<T, E> to U by applying fallback function default to a contained Err value, or function fn to a contained Ok value.
Example:
inspect(callable $fn): self
Calls the provided closure with a reference to the contained value (if Ok).
Example:
inspectErr(callable $fn): self
Calls the provided closure with a reference to the contained error (if Err).
Example:
and(Result $res): Result
Returns res if the result is Ok, otherwise returns the Err value of self.
Example:
andThen(callable $fn): Result
Calls fn if the result is Ok, otherwise returns the Err value of self.
Example:
or(Result $res): Result
Returns self if it is Ok, otherwise returns res.
Example:
orElse(callable $fn): Result
Calls fn if the result is Err, otherwise returns the Ok value of self.
Example:
transpose(?string $noneClassName, ?string $someClassName): mixed
Transposes a Result of an Option into an Option of a Result.
Example:
match(callable $Ok, callable $Err): mixed
Matches the result and returns a value based on the provided patterns.
Example:
Complementary Packages
This package works well with the PHP Option Type package, which implements the Option Type. Some methods in this package, such as transpose, depend on the Option Type implementation.
Static Analysis
We recommend using PHPStan for static code analysis. This package includes custom PHPStan rules to enhance type checking for Result types. To enable these rules, add the following to your PHPStan configuration:
Contributing
Please see CONTRIBUTING.md for details.
Security Vulnerabilities
Pleas review our security policy on how to report security vulnerabilities.
License
Please see LICENSE.md for more information.
