Exceptionally

A PHP library that converts errors into exceptions easily.

<?php

use function VUdaltsov\Exceptionally\exceptionallyCall;
use VUdaltsov\Exceptionally\Exception\WarningException;

try {
    $handle = exceptionallyCall('fopen', 'data.xml', 'rb');
} catch (WarningException $exception) {
    throw new FailedToOpenFileException($exception->getMessage(), 0, $exception);
}

Installation

composer require vudaltsov/exceptionally

Usage

exceptionallyCall()

The exceptionallyCall(callable $callable, mixed ...args): mixed function allows to execute callables immediately.

<?php

use function VUdaltsov\Exceptionally\exceptionallyCall;
use VUdaltsov\Exceptionally\Exception\WarningException;

try {
    $file = 'data.xml';
    $handle = exceptionallyCall('touch', $file);
} catch (WarningException $exception) {
    throw new FailedToTouchFileException($file, 0, $exception);
}

exceptionally()

In advanced cases use the exceptionally(): Exceptionally function. It returns an immutable configurator.

For instance, you can specify the error severity level (see set_error_handler(..., $error_types) for details). By default all errors (E_ALL) are captured.

<?php

use function VUdaltsov\Exceptionally\exceptionally;
use VUdaltsov\Exceptionally\Exception\NoticeException;

$accessor = exceptionally()
    ->callable(static function (array $array, string $offset): string {
        return $array[$offset];
    })
    ->level(E_NOTICE)
;

try {
    $value = $accessor(['a' => 1], 'b');
} catch (NoticeException $exception) {
    throw new OutOfRangeException($exception->getMessage(), 0, $exception);
}

You can even set the default arguments.

<?php

use function VUdaltsov\Exceptionally\exceptionally;

$mkdir = exceptionally()
    ->callable('mkdir')
    ->args(__DIR__.'/a', 0777, true)
;

$mkdir();

By default suppressed errors are not thrown, but you can enable that.

<?php

use function VUdaltsov\Exceptionally\exceptionally;

exceptionally()
    ->throwSuppressed()
    ->callable(static function (): void {
        @include __DIR__.'/script.php';
    })
    ->call()
;

Immutability

The exceptionally() configurator is immutable. It returns a new object on each call (same as PSR-7 Messages). Hence, you can safely reuse a preconfigured instance in your code.

Exceptions

Exceptionally throws subclasses of the native ErrorException.

Error level	Exception class
`E_WARNING`	`VUdaltsov\Exceptionally\Exception\WarningException`
`E_NOTICE`	`VUdaltsov\Exceptionally\Exception\NoticeException`
`E_RECOVERABLE_ERROR`	`VUdaltsov\Exceptionally\Exception\RecoverableErrorException`
`E_DEPRECATED`	`VUdaltsov\Exceptionally\Exception\DeprecatedException`
`E_USER_ERROR`	`VUdaltsov\Exceptionally\Exception\UserErrorException`
`E_USER_WARNING`	`VUdaltsov\Exceptionally\Exception\UserWarningException`
`E_USER_NOTICE`	`VUdaltsov\Exceptionally\Exception\UserNoticeException`
`E_USER_DEPRECATED`	`VUdaltsov\Exceptionally\Exception\UserDeprecatedException`

Note that E_ERROR, E_PARSE, E_CORE_ERROR, E_CORE_WARNING, E_COMPILE_ERROR, E_COMPILE_WARNING levels are not supported, because they can not be handled with the set_error_handler function.

E_STRICT is not supported as well, because it is not used in PHP 7 anymore.