什麼是{「data」：「w-file1」，「attr」：{「rel」：「file」}}在PHP中的json語法？

Question

什麼是PHP代碼來獲得這個json？

{ "data": "w-file1", 
    "attr": { "rel" : "file"} 
} 

我正在PHP Parse error: syntax error, unexpected T_DOUBLE_ARROW錯誤

$file = ("data" => "w-file1","attr" => ("rel" => "file")); 
echo json_encode($file); 

Answer 1

$文件需要一個數組一樣的attr鍵：

$file = array("data" => "w-file1","attr" => array("rel" => "file")); 
echo json_encode($file); 

當然，你可以內嵌它：

echo json_encode(array("data" => "w-file1","attr" => array("rel" => "file"))); 

或者，有OOP方法：

$file = new stdClass(); 
$file->data = 'w-file'; 
$file->attr = new stdClass(); 
$file->attr->rel = "file"; 
echo json_encode($file); 

Answer 2

$file = array(
    "data" => "w-file1", 
    "attr" => array("rel" => "file") 
); 
echo json_encode($file); 

Answer 3

你需要爲$文件和attR指定array：

$file = array("data" => "w-file1","attr" => array("rel" => "file")); 
echo json_encode($file);