improved / type
Type handling
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Requires
- php: >=7.2.0
Requires (Dev)
- jasny/php-code-quality: ~2.3
This package is auto-updated.
Last update: 2024-10-12 05:12:39 UTC
README
type handling
Library for type handling.
This library provides a set of consistent functions for PHP. You should always use these types rather than the ones provided by PHP natively.
Installation
composer require improved/type
types
type_is(mixed $var, string|string[] $type)
type_check(mixed $var, string|string[] $type, Throwable $throwable = null)
type_cast(mixed $var, string|string[] $type, Throwable $throwable = null)
type_describe(mixed $var)
Reference
type_is
bool type_is(mixed $var, string|string[] $type)
Return true if variable has the specified type.
As type you can specify any internal type, including callable
and object
, a class name or a resource type (eg
stream resource
).
Typed arrays or iteratators are not supported, as it would require looping through them.
A question mark can be added to a class to accept null, eg "?string"
is similar to using ["string", "null"]
.
type_check
mixed type_check(mixed $var, string|string[] $type, Throwable $throwable = null)
Validate that a variable has a specific type. The same types cas in type_is()
can be used.
Typed arrays or iteratators are not supported. Use
iterable_check_type
instead.
By default a TypeError
is thrown. Optionally you can pass an exception instead.
The message may contain a %s
, which is replaced by the type description of $var
. It optionally may contain a second
%s
which is replaced by the description of the required type. Use sprintf positioning to use the required type first.
If the message or the exception or error contains a %
, a new throwable of the same type is created with the filled
out message.
The function returns $var
if the type matches, so you can use it while setting a variable.
use Improved as i; $date = i\type_check(get_some_date(), DateTimeInterface::class); $name = i\type_check($user->getName(), 'string'); $number = i\type_check(get_distance(), ['int', 'float']); $foo = i\type_check(do_something(), Foo::class, new UnexpectedException('Wanted %2$s, not %1$s'));
A question mark can be added to a class to accept null, eg "?string"
is similar to using ["string", "null"]
.
type_cast
mixed type_cast(mixed $var, string $type, Throwable $throwable = null)
Check the variable has a specific type or can be casted to that type, otherwise throw a TypeError
or exception.
This function is similar to type_check
, with the difference that is will cast the value in some cases
In contrary to type_is
and type_check
, only one type may be specified.
A question mark can be added to a class to accept null, eg ?string
will try to cast everything to a string except
null
.
type_describe
string type_describe(mixed $var, bool $detailed = false)
Get the type of a variable in a descriptive way to using in an (error) message.
For scalar, null and array values, the result is the same a gettype
. Except for floats which will return float
rather than double
.
Objects are have their class name, appended with object
. For resources the resource type is returned, appended with
resource
.
type_describe('hello'); // string type_describe(22); // integer type_describe(STDIN); // stream resource type_describe(new DateTime()); // instance of DateTime
The detailed option describes both the value an type. This is similar to what is used in the error messages of
type_check
and type_cast
.
type_describe('hello'); // string(5) "hello" type_describe(22); // int(22) type_describe(["a", "b", "c"]); // array(3)