JSON字符串PHP數組NULL

Question

這裏是我的代碼：

var_dump(json_decode($data['event']->options['meals']['options'][0]['option'], true)); 
    echo '<br />';echo '<br />'; 
    var_dump($data['event']->options['meals']['options'][0]['option']); 
    echo '<br />';echo '<br />'; 
    var_dump(json_decode('[{"name":"Petit Tenderloin","description":"Wrapped in Apple Wood Bacon, borsoun whipped mashed potatoes, roasted baby vegetable, with sun dried cherry sauce. "},{"name":"Chicken Piccatta","description":"In lemon caper sauce, served with a timbal of wild rice and vegetables. "}]', true)); 

這裏是我的輸出：

NULL 

string(279) "[{"name":"Petit Tenderloin","description":"Wrapped in Apple Wood Bacon, borsoun whipped mashed potatoes, roasted baby vegetable, with sun dried cherry sauce. "},{"name":"Chicken Piccatta","description":"In lemon caper sauce, served with a timbal of wild rice and vegetables. "}]" 

array(2) { [0]=> array(2) { ["name"]=> string(16) "Petit Tenderloin" ["description"]=> string(115) "Wrapped in Apple Wood Bacon, borsoun whipped mashed potatoes, roasted baby vegetable, with sun dried cherry sauce. " } [1]=> array(2) { ["name"]=> string(16) "Chicken Piccatta" ["description"]=> string(72) "In lemon caper sauce, served with a timbal of wild rice and vegetables. " } } 

爲什麼，當我把一個字符串獲得正確的陣列，但是當我傳遞一個變量時，我得到NULL？我覺得我失去了一些東西超級簡單....

編輯：找到了原因 看起來像變了一個新行字符自然不會在HTML顯示出來。看起來像新行字符符json_decode ...

任何人都知道的周圍其他的方式不是刪除新線？ （我寧願讓他們在，如果我能）

Answer 1

的轉義的新行字符將打破json_decode因爲這不是有效的JSON 。

Previous question on escaping line breaks in JSON。

出現退房eyelidlessness'答案保持換行符。短版是你需要逃避他們，例如：

$text = str_replace("\n", "\\n", $text); 

或者，您可能需要使用<br>取代換行符，逃避他們在瀏覽器中渲染的insetad。

你有GIGO。不知道你是否在控制輸入，但如果你是，那麼你應該在前端使用json_encode來逃避它，它會自動逃脫（並因此保留）換行符。

Answer 2

確保陣列具有在第一行，你var_dump其內容的數據。我無法重現您的錯誤。

我的代碼：？

<?php 

$data['event']->options['meals']['options'][0]['option'] = '[{"name":"Petit Tenderloin","description":"Wrapped in Apple Wood Bacon, borsoun whipped mashed potatoes, roasted baby vegetable, with sun dried cherry sauce. "},{"name":"Chicken Piccatta","description":"In lemon caper sauce, served with a timbal of wild rice and vegetables. "}]'; 

var_dump(json_decode($data['event']->options['meals']['options'][0]['option'], true)); 
echo '<br />';echo '<br />'; 
var_dump($data['event']->options['meals']['options'][0]['option']); 
echo '<br />';echo '<br />'; 
var_dump(json_decode('[{"name":"Petit Tenderloin","description":"Wrapped in Apple Wood Bacon, borsoun whipped mashed potatoes, roasted baby vegetable, with sun dried cherry sauce. "},{"name":"Chicken Piccatta","description":"In lemon caper sauce, served with a timbal of wild rice and vegetables. "}]', true)); 

>

這是它產生了我的輸出：

array(2) { 
    [0] => 
    array(2) { 
    'name' => 
    string(16) "Petit Tenderloin" 
    'description' => 
    string(115) "Wrapped in Apple Wood Bacon, borsoun whipped mashed potatoes, roasted baby vegetable, with sun dried cherry sauce. " 
    } 
    [1] => 
    array(2) { 
    'name' => 
    string(16) "Chicken Piccatta" 
    'description' => 
    string(72) "In lemon caper sauce, served with a timbal of wild rice and vegetables. " 
    } 
} 
<br /><br /> 
string(278) "[{"name":"Petit Tenderloin","description":"Wrapped in Apple Wood Bacon, borsoun whipped mashed potatoes, roasted baby vegetable, with sun dried cherry sauce. "},{"name":"Chicken Piccatta","description":"In lemon caper sauce, served with a timbal of wild rice and vegetables. "}]" 
<br /><br /> 
array(2) { 
    [0] => 
    array(2) { 
    'name' => 
    string(16) "Petit Tenderloin" 
    'description' => 
    string(115) "Wrapped in Apple Wood Bacon, borsoun whipped mashed potatoes, roasted baby vegetable, with sun dried cherry sauce. " 
    } 
    [1] => 
    array(2) { 
    'name' => 
    string(16) "Chicken Piccatta" 
    'description' => 
    string(72) "In lemon caper sauce, served with a timbal of wild rice and vegetables. " 
    } 
}