json_encode 是 PHP 中用于將數組或對象轉換為 JSON 格式的函數。要處理數組，只需將要編碼的數據作為參數傳遞給 json_encode 函數即可。以下是一些示例：
$array = array(
"name" => "John",
"age" => 30,
"city" => "New York"
);
$json = json_encode($array);
echo $json; // 輸出：{"name":"John","age":30,"city":"New York"}
$array = array(
array("name" => "John", "age" => 30),
array("name" => "Jane", "age" => 28)
);
$json = json_encode($array);
echo $json; // 輸出：[{"name":"John","age":30},{"name":"Jane","age":28}]
$array = array(
"names" => array("John", "Jane", "Doe"),
"ages" => array(30, 28, 25)
);
$json = json_encode($array);
echo $json; // 輸出：{"names":["John","Jane","Doe"],"ages":[30,28,25]}
json_encode 函數還可以接受其他可選參數，例如設置 JSON 格式化的選項。要了解更多關于 json_encode 的信息，可以查閱 PHP 官方文檔：https://www.php.net/manual/en/function.json-encode.php
