我需要創(chuàng)建一個 PHP 類，該類將具有該類的多個父子關(guān)系，以便轉(zhuǎn)換后的 JSON 字符串看起來與此類似。如果“children”為空數(shù)組，如何使其不出現(xiàn)在 JSON 中？{ name: "Element Parent", code: "000" children: [ { name: "Element Child 1" code: "001" children: [ { name: "Element Child 1A" code: "001A" }, { name: "Element Child 1B" code: "001B" children: [ { name: "Element Child 1BA" code: "001BA" } ] } ] } , { name: "Element Child 2" code: "002" } ]}我正在嘗試創(chuàng)建一個可以轉(zhuǎn)換為上面的 JSON 字符串的 PHP 類。<?phpclass Element implements \JsonSerializable{ private $name; private $code; public function __construct($name, $code, ) { $this->name = $name; $this->code = $code; } public function jsonSerialize() { return get_object_vars($this); } public function toJSON(){ return json_encode($this); } public $children[] = array(); // to contain Element children class }$element = new Element("Element Parent", 000);$elementChild1 = new Element("Element Child 1", "001");$elementChild1A = new Element("Element Child 1A", "001A");$elementChild1B = new Element("Element Child 1B", "001B");$elementChild1BA = new Element("Element Child 1BA", "001BA");$elementChild1B->children[] = $elementChild1BA;$elementChild1->children[] = $elementChild1A;$elementChild1->children[] = $elementChild1B;$element->children[] = elementChild1;$elementChild2 = new Element("Element Child 2", "002");$element->children[] = elementChild2;echo $element->toJSON();?>非常感謝。
1 回答
慕容森
TA貢獻(xiàn)1853條經(jīng)驗 獲得超18個贊
在jsonSerialize您實現(xiàn)的函數(shù)中，您可以更改序列化行為。在那里，您可以檢查是否有兒童，并在需要時將其留在外面。在這種情況下，你最終會得到這樣的結(jié)果：
public function jsonSerialize() {
$data = [
"name" => $this->name,
"code" => $this->code
];
if(!empty($this->children)) {
$data["children"] = $this->children;
}
return $data;
}
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