編輯Json文件

Question

我正在嘗試使用jQuery甘特圖作爲wordpress插件。目前，我一直在編輯data.json。我使用一個PHP表單來填充一個新項目。提交表單時，它會將數據添加到文件中，但在方括號後面。

[{ 
    ... 

}, 
{ "name" : "Vermessung" 
    , "desc" : "" 
    , "values": [ 
    { "id"   : "5" 
    , "from"  : "/Date(1363132800000)/" 
    , "to"   : "/Date(1368655200000)/" 
    , "desc"  : "Vom Beauftragen der Vermessung bis zur tatsächlichen Vermessung" 
    , "customClass": "ganttBlue" 
    , "label"  : "Vermessung" 
    } 
    ] 
} 
] 

提交表格後，它看起來是這樣的：

[{ 
    ... 

}, 
{ "name" : "Vermessung" 
    , "desc" : "" 
    , "values": [ 
     { "id"   : "5" 
     , "from"  : "/Date(1363132800000)/" 
     , "to"   : "/Date(1368655200000)/" 
     , "desc"  : "Vom Beauftragen der Vermessung bis zur tatsächlichen Vermessung" 
     , "customClass": "ganttBlue" 
     , "label"  : "Vermessung" 
     } 
    ] 
} 
]{"name":null,"desc":null,"values":{"id":null,"from":null,"to":null,"desc":null,"customClass":null,"label":null}} 

這將增加東西向JSON請求的PHP代碼：

$file = jQg_BASENAME_DIR.'/inc/data.json'; 
log_me('This is a message for debugging purposes'); 

if(isset($_POST['submit'])){ 

$json = file_get_contents($file); 
$data = json_decode($json); 

// convert form data to json format 
    $postArray = array(
     "name" => $_POST['name'], 
     "desc" => $_POST['desc'], 
     "values" => array(
     "id" => $_POST["value_id"], 
     "from" => $_POST['value_from'], 
     "to" => $_POST['value_to'], 
     "desc" => $_POST['value_desc'], 
     "customClass" => $_POST['value_class'], 
     "label" => $_POST['value_label'] 
     ) 
    ); //you might need to process any other post fields you have.. 

$json = json_encode($postArray); 
array_push($json, $postArray); 
// write to file 
file_put_contents($file, $json, FILE_APPEND); 

我也不能建立方括號後爲value。我怎樣才能解決這個問題？

Answer 1

正如我在我的評論說

$json = file_get_contents($file); 

// $json is now a string 

$data = json_decode($json); 

// $data is a PHP object 
// So lets call the second array $data->someArray 
// since I do not know what it is called looking at your file 

// convert form data to PHP array format 
    $postArray = array(
     "name" => $_POST['name'], 
     "desc" => $_POST['desc'], 
     "values" => array(
     "id" => $_POST["value_id"], 
     "from" => $_POST['value_from'], 
     "to" => $_POST['value_to'], 
     "desc" => $_POST['value_desc'], 
     "customClass" => $_POST['value_class'], 
     "label" => $_POST['value_label'] 
     ) 
    ); //you might need to process any other post fields you have.. 

// $postArray is a PHP object 

// $json = json_encode($postArray); // do NOT convert here 

array_push($data->someArray, $postArray); 
$json = json_encode($data); 
// write to file 
file_put_contents($file, $json, FILE_APPEND); 

Answer 2

你的值字段是一個對象而不是對象的數組（php關聯數組的編碼是一個json對象）。因此，對於具有方括號而不是「values」=> array（）的值，您需要「values」=> array（array（「id」=> ...等等））

至於你的第一個問題你已經顛倒了json_encoding。首先將你的postArray推入數據，然後json_encode數據。