如何在PHP中處理<select>的多個值？

Question

<select id="industryExpect" multiple="multiple"> 
<option value="1">item1</option> 
<option value="2">item2</option> 
<option value="3">item3</option> 
... 
</select> 

我所看到的是這樣的： industryExpect = 13 & industryExpect = 17 & industryExpect = 19

說，還有使用相同的密鑰多個值，

如何從$ _ POST檢索它們在PHP中？

Answer 1

給它一個名稱與[]上月底，例如：

<select id="industryExpect" name="industryExpect[]" multiple="multiple"> 
    <option value="1">item1</option> 
    <option value="2">item2</option> 
    <option value="3">item3</option> 
</select> 

然後在你的$_POST數組，你會獲取所有選定選項的陣列：

// assuming that item1 and item3 were selected: 
print_r($_POST['industryExpect']); 
/* 
array 
(
    0 => 1 
    1 => 3 
) 
*/ 

Answer 2

啓動Html文件。恩。 a.html

<form action="process.php" method="post"> 
    <select name="names[]" multiple="multiple"> 
    <option value="john">john</option> 
    <option value="jack">jack</option> 
    </select> 
    <input type=hidden name=submitted> 
    <input type=submit name=submit> 
</form> 

Process.php：

<?php 
print_r($_POST['names']); 
?>