cast

Safely cast mixed values to scalar types or null.

Used to provide safe casts of scalar values and DateTime in PHP, avoiding PHPSTAN issues when casting 'mixed' values that do not convert as expected.

For a better understanding of the problem, take a look at the PHPSTAN issue 9295: phpstan/phpstan#9295

Documentation

---

Installation

composer require xactsystems/cast

Usage

<?php

declare(strict_types=1);

namespace Xact\Cast;

use DateTime;
use Xact\Cast\Cast;

class Test
{
    protected int $myInt;
    protected ?int $myNullInt;
    protected float $myFloat;
    protected ?float $myNullFloat;
    protected string $myString;
    protected ?string $myNullString;
    protected bool $myBool;
    protected ?bool $myNullBool;
    protected ?array $myNullArray;
    protected ?object $myNullObject;
    protected ?DateTime $myNullDateTime;

    public function testCast(mixed $value, mixed $nullValue = null): void
    {
        $this->myInt = Cast::intval($value);
        $this->myNullInt = Cast::nullInt($nullValue);
        $this->myFloat = Cast::nullFloat($value);
        $this->myNullFloat = Cast::nullFloat($nullValue);
        $this->myString = Cast::strval($value);
        $this->myNullString = Cast::nullString($nullValue);
        $this->myBool = Cast::boolval($value);
        $this->myNullBool = Cast::nullBool($nullValue);
        $this->myNullArray = Cast::nullArray($nullValue);
        $this->myNullObject = Cast::nullObject($nullValue);
        $this->myNullDateTime = Cast::nullDateTime($nullValue);
    }
}

Methods

static Cast::intval(mixed $value): int

Cast $value to an int.

Throws \InvalidArgumentException if $value is not one of array, bool, float, int, resource, string, null.

static floatval(mixed $value): float

Cast $value to a float.

Throws \InvalidArgumentException if $value is not one of array, bool, float, int, string, null.

static strval(mixed $value): string

Cast $value to a float.

Throws \InvalidArgumentException if $value is not one of bool, float, int, resource, string, null.

static boolval(mixed $value): bool

Cast $value to a float.

Throws \InvalidArgumentException if $value is not one of array, bool, float, int, string, null.

static nullInt(mixed $value): ?int

Cast $value to int|null.

Throws \InvalidArgumentException if $value is not one of array, bool, float, int, resource, string, null.

static nullFloat(mixed $value): ?float

Cast $value to float|null.

Throws \InvalidArgumentException if $value is not one of array, bool, float, int, string, null.

static nullString(mixed $value): ?string

Cast $value to string|null.

Throws \InvalidArgumentException if $value is not one of bool, float, int, resource, string, null.

static nullBool(mixed $value): ?bool

Cast $value to bool|null.

Throws \InvalidArgumentException if $value is not one of array, bool, float, int, string, null.

static nullArray(mixed $value): ?array

Cast $value to array|null.

See https://www.php.net/manual/en/language.types.array.php#language.types.array.casting

static nullObject(mixed $value): ?object

Cast $value to object|null.

See See https://www.php.net/manual/en/language.types.object.php#language.types.object.casting

static nullDateTime(mixed $value): ?DateTime

Cast $value to DateTime|null.

Throws \InvalidArgumentException if $value is not one of bool, float, int, resource, string, null. See https://www.php.net/manual/en/datetime.construct.php for valid DateTime string formats.