wiki/content/20201111100807-php_throw_expression.md

date	id	title
2020-11-11	d4bcfd55-088e-4658-9e7b-5429f7ec060f	PHP Throw Expression

Description

Since PHP 8.0, throw can also be used as an expression¹.

Syntax

// This was previously not possible since arrow functions only accept a single expression while throw was a statement.
$callable = fn() => throw new Exception();

// $value is non-nullable.
$value = $nullableValue ?? throw new InvalidArgumentException();

// $value is truthy.
$value = $falsableValue ?: throw new InvalidArgumentException();

// $value is only set if the array is not empty.
$value = !empty($array)
    ? reset($array)
    : throw new InvalidArgumentException();

$condition && throw new Exception();
$condition || throw new Exception();
$condition and throw new Exception();
$condition or throw new Exception();

Footnotes

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1. https://wiki.php.net/rfc/throw_expression ↩︎