PHP。該陣列

Question

在創建選中框的值我有以下表格：

<form action="update-table.php" method="post"> 
<table class="table-data" border="1"> 
    <thead> 
     <tr> 
      <td>ID</td> 
      <td>Live</td> 
      <td>User</td> 
      <td>Last Update</td> 
      <td>Title</td> 
      <td>Content</td> 
      <td>Edit</td> 
      <td>Delete</td> 
     </tr> 
    </thead> 
    <tbody> 
     <tr> 
      <td><input name="id[]" type="text" readonly="readonly" value="1" /></td> 
      <td><input name="live[]" type="checkbox" checked="checked" value="1"/></td> 
      <td>admin@website.com</td> 
      <td>August 18, 2011, 10:10 am</td> 
      <td>Title1</td> 
      <td>Content1</td> 
      <td><a href="edit-news.php?editID=1">Edit</a></td> 
      <td><a href="delete-news.php?deleteID=1">Delete</a></td> 
     </tr> 
     <tr> 
      <td><input name="id[]" type="text" readonly="readonly" value="2" /></td> 
      <td><input name="live[]" type="checkbox" /></td> 
      <td>admin@website.com</td> 
      <td>August 18, 2011, 10:11 am</td> 
      <td>Title2</td> 
      <td>Content2</td> 
      <td><a href="edit-news.php?editID=2">Edit</a></td> 
      <td><a href="delete-news.php?deleteID=2">Delete</a></td> 
     </tr> 
     <tr> 
      <td><input name="id[]" type="text" readonly="readonly" value="3" /></td> 
      <td><input name="live[]" type="checkbox"/></td> 
      <td>admin@website.com</td> 
      <td>August 18, 2011, 10:10 am</td> 
      <td>Title3</td> 
      <td>Content3</td> 
      <td><a href="edit-news.php?editID=3">Edit</a></td> 
      <td><a href="delete-news.php?deleteID=3">Delete</a></td> 
     </tr> 
    </tbody> 
</table> 
<input type="submit" /> 

我想要做的是顯示陣列$_POST發送。

問題是，當未選中複選框 - 什麼都沒有送。

如何檢查$_POST['live']是否已設置，如果沒有 - 將其值設置爲0？

下面的代碼無法正常工作。爲什麼？

if (!isset($_POST['live'])) { 
      $_POST['live'] = "0"; 
     } 


     for ($i=0;$i<count($_POST['id']);$i++) { 

      echo "<p>".$_POST['id'][$i]."</p>"; 
      echo "<p>".$_POST['live'][$i]."</p>"; 
      echo "<hr />"; 

     } 

Answer 1

試試這個：

for ($i=0;$i<count($_POST['id']);$i++) { 

    if(!isset($_POST['live'][$i])){ 
     $_POST['live'][$i] = "0"; 
    } 

    echo "<p>".$_POST['id'][$i]."</p>"; 
    echo "<p>".$_POST['live'][$i]."</p>"; 
    echo "<hr />"; 
}