無法檢索從複選框數組值

Question

我有多個複選框（陣列），如下代碼：

      <div class="checkbox"> 
           <label><input type="checkbox" name="major[]" value="Business" /> Business</label> 
          </div> 
          <div class="checkbox"> 
           <label><input type="checkbox" name="major[]" value="Public Affairs/Law" />Public Affairs/Law</label> 
          </div> 
          <div class="checkbox"> 
           <label><input type="checkbox" name="major[]" value="Medicine" />Medicine</label> 
          </div> 
          <div class="checkbox"> 
           <label><input type="checkbox" name="major[]" value="Literature/Writing/Journalism" />Literature/Writing/Journalism</label> 
          </div> 
          <div class="checkbox"> 
           <label><input type="checkbox" name="major[]" value="Technology" />Technology</label> 
          </div> 
          <div class="checkbox"> 
           <label><input type="checkbox" name="major[]" value="Engineering" />Engineering</label> 
          </div> 

當表單提交，我試圖通過檢索所選擇的值：

  print_r($_POST['major']); 

它打印：

  Array ([0] => [1] =>) 

它檢測到兩個複選框勾選，但它以某種方式無法檢索出的值。我究竟做錯了什麼？

======================= PHP代碼片段===================== =======

require 'dbconnect.php'; 


if($_SERVER["REQUEST_METHOD"] == "POST"){ 
       if(isset($_POST['major'])){ 

       $top_majors = implode(',', $_POST['top_three_major']); 

       echo $top_majors; 
      }else{ 

       $top_majors = '-'; 

      } 
} 

=======================解決============ ================

好的，我解決了我的問題。這是一個愚蠢的錯誤，我試圖在瀏覽器準備就緒時清除表單域，因此，複選框值在POST之前被重置。

謝謝你們幫助我！特別是學習者學生，我明白這一點！我希望我能投票給你們，但太糟糕了，我的名聲太低了。再次

感謝。

Answer 1

我試過這個代碼。有一些報價缺失。在插入後thos工作得很好。

<div class="checkbox"> 
          <label><input type="checkbox" name="major[]" value="Business" /> Business</label> 
         </div> 
        <div class="checkbox"> 
          <label><input type="checkbox" name="major[]" value="Public Affairs/Law" />Public Affairs/Law</label> 
         </div> 
         <div class="checkbox"> 
          <label><input type="checkbox" name="major[]" value="Medicine" />Medicine</label> 
         </div> 
         <div class="checkbox"> 
          <label><input type="checkbox" name="major[]" value="Literature/Writing/Journalism" />Literature/Writing/Journalism</label> 
         </div> 
         <div class="checkbox"> 
          <label><input type="checkbox" name=major[] value="Technology" />Technology</label> 
         </div> 
         <div class="checkbox"> 
          <label><input type="checkbox" name="major[]" value="Engineering" />Engineering</label> 
         </div> 

--PHP ---

print_r($_POST['major']); 

--out把-----

Array ([0] => Medicine [1] => Literature/Writing/Journalism [2] => Technology) 

Answer 2

試試這個

<div class="checkbox"> 
    <label><input type="checkbox" name="major[]" value="Medicine" />Medicine</label> 
</div> 
<div class="checkbox"> 
    <label><input type="checkbox" name="major[]" value="Literature/Writing/Journalism" />Literature/Writing/Journalism</label> 
</div> 
<div class="checkbox"> 
    <label><input type="checkbox" name="major[]" value="Technology" />Technology</label> 
</div> 
<div class="checkbox"> 
    <label><input type="checkbox" name="major[]" value="Engineering" />Engineering</label> 
</div> 

Answer 3

試試這個，現在是工作...

<form action="<?=$_SERVER["PHP_SELF"];?>" method="post"> 
    <div class="checkbox"> 
     <label><input type="checkbox" name="major[]" value="Medicine"/>Medicine</label> 
    </div> 
    <div class="checkbox"> 
     <label><input type="checkbox" name="major[]" value="Literature/Writing/Journalism"/>Literature/Writing/Journalism</label> 
    </div> 
    <div class="checkbox"> 
     <label><input type="checkbox" name="major[]" value="Technology"/>Technology</label> 
    </div> 
    <div class="checkbox"> 
     <label><input type="checkbox" name="major[]" value="Engineering"/>Engineering</label> 
    </div> 
    <input type="submit" name="submit" value="Submit"> 
</form> 

在php編寫代碼在同一頁，因爲我寫$_SERVER["PHP_SELF"]在action意思是在同一頁面提交表單只是如果你想改變行動。

if(isset($_POST['submit'])) { 
    echo '<pre>';print_r($_POST['major']);echo '</pre>'; 
    echo '<pre>';print_r($_POST);echo '</pre>'; 
} 

Answer 4

它的工作：

<form action="" method="post" > 
    <div class="checkbox"> 
           <label><input type="checkbox" name="major[]" value="Medicine" />Medicine</label> 
          </div> 
          <div class="checkbox"> 
           <label><input type="checkbox" name="major[]" value="Literature/Writing/Journalism" />Literature/Writing/Journalism</label> 
          </div> 
          <div class="checkbox"> 
           <label><input type="checkbox" name="major[]" value="Technology" />Technology</label> 
          </div> 
          <div class="checkbox"> 
           <label><input type="checkbox" name="major[]" value="Engineering" />Engineering</label> 
          </div> 
          <input type="submit"> 
    </form> 
<?php 
if(isset($_POST['major'])) 
print_r($_POST['major']); 
?> 

3TH name=major[]"只是改變name="major[]"你的HTML語法是錯誤的！