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@ 2016-03-16T12:57:47Z

<?php

class A implements JsonSerializable{
    public $baz = 10;
    function jsonSerialize(){
        return ['bar' => 20];
    }
}

class B implements JsonSerializable{
    function jsonSerialize(){
        return ['foo' => (new A)->jsonSerialize()];
    }
}

echo json_encode(new B, JSON_PRETTY_PRINT);

Output
Performance
VLD
References
Branches

json_encode: documentation ( source)

preferences:dark modelive previewkey bindings

38.86 ms | 1894 KiB | 5 Q