When did PHP have this below?
use Namespace\{Foo, Bar}
I came across this pattern from the php pleague:
namespace Acme;
class Foo
{
/**
* @type Acme\Bar
*/
public $bar;
/**
* Construct.
*
* @param \Acme\Bar $bar
*/
public function __construct(Bar $bar)
{
$this->bar = $bar;
}
}
class Bar
{
// ...
}
And then:
<?php
use Acme\{Foo, Bar};
Is it valid? If it is, where can study this further?
Yes, it's valid. It was introduced in PHP 7.0. From the docs:
From PHP 7.0 onwards, classes, functions and constants being imported from the same namespace can be grouped together in a single use statement.
<?php // Pre PHP 7 code use some\namespace\ClassA; use some\namespace\ClassB; use some\namespace\ClassC as C; ... // PHP 7+ code use some\namespace\{ClassA, ClassB, ClassC as C}; use function some\namespace\{fn_a, fn_b, fn_c}; use const some\namespace\{ConstA, ConstB, ConstC};
According to the docs, it's valid in PHP7 and upwards:
From PHP 7.0 onwards, classes, functions and constants being imported from the same namespace can be grouped together in a single use statement.
They provide the following example:
<?php
// Pre PHP 7 code
use some\namespace\ClassA;
use some\namespace\ClassB;
use some\namespace\ClassC as C;
use function some\namespace\fn_a;
use function some\namespace\fn_b;
use function some\namespace\fn_c;
use const some\namespace\ConstA;
use const some\namespace\ConstB;
use const some\namespace\ConstC;
// PHP 7+ code
use some\namespace\{ClassA, ClassB, ClassC as C};
use function some\namespace\{fn_a, fn_b, fn_c};
use const some\namespace\{ConstA, ConstB, ConstC};
