새로 생성된 PHP 객체에 메소드를 연결하는 방법은 무엇입니까?

Method Chaining on Newly Created Objects in PHP

In PHP, method chaining is a technique that allows you to call multiple methods on an object in a single line of code. However, when instantiating a new object, it is initially not possible to chain methods directly due to limitations in PHP's syntax.

PHP 5.4+ Solution

With the introduction of PHP 5.4, a more convenient solution was introduced. You can wrap the object instantiation in parentheses:

<code class="php">(new Foo())->xyz();</code>

Prior to PHP 5.4

Before PHP 5.4, you could not chain methods directly after object instantiation using the new syntax. Instead, one workaround was to create a static instantiation method:

<code class="php">class Foo
{
    // ...

    static public function instantiate()
    {
        return new self();
    }
}

$a = Foo::instantiate()->xyz();</code>

Conclusion

Method chaining on newly created objects is now seamlessly integrated into PHP 5.4 and later versions. The parentheses notation provides a concise and intuitive way to initialize and modify objects in a single line.

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