<table>
<col width="250">
<col width="250">
<col width="250">
<tr><td>
<input type="checkbox" name="toppings[]"/>Pepperoni<br>
<input type="checkbox" name="toppings[]"/>Mushroom<br>
<input type="checkbox" name="toppings[]"/>Bacon
</td>
<td>
<input type="checkbox" name="toppings[]"/>Onion<br>
<input type="checkbox" name="toppings[]"/>Tomatoes<br>
<input type="checkbox" name="toppings[]"/>Olives
</td>
<td>
<input type="checkbox" name="toppings[]"/>Pineapple<br>
<input type="checkbox" name="toppings[]"/>Green Pepper<br>
<input type="checkbox" name="toppings[]"/>Extra Cheese
</td>
</tr>
</table>
$toppings = isset($_POST["toppings[]"]) ? $_POST["toppings[]"] : array("");
foreach($toppings as $chk => $selection){
echo $selection . ", ";
}
/*
不管什么原因，我的$selection值总是空的。我打印过的最多的是"on"这个词，它只有在至少一个复选框被选中时才会显示为on。我已经尝试了30多种不同的解决方案来迭代复选框数组，但似乎没有任何工作。我做错了什么?
Sorry for the poorly formatted code, and thanks in advance for the help.
*/
尝试在复选框中添加value=属性
<tr><td>
<input type="checkbox" name="toppings[]" value="Pepperoni" />Pepperoni<br>
<input type="checkbox" name="toppings[]" value="Mushroom"/>Mushroom<br>
<input type="checkbox" name="toppings[]" value="Bacon" />Bacon
</td>
<td>
<input type="checkbox" name="toppings[]" value="Onion" />Onion<br>
<input type="checkbox" name="toppings[]" value="Tomatoes" />Tomatoes<br>
<input type="checkbox" name="toppings[]" value="Olives" />Olives
</td>
<td>
<input type="checkbox" name="toppings[]" value="Pinapple" />Pineapple<br>
<input type="checkbox" name="toppings[]" value="Green Pepper" />Green Pepper<br>
<input type="checkbox" name="toppings[]" value="Extra Cheese" />Extra Cheese
</td></tr>
检查$_POST["toppings"]，不检查$_POST["toppings[]"]
$toppings = isset($_POST["toppings"]) ? $_POST["toppings"] : array();
if(!empty($toppings)){
foreach($toppings as $chk => $selection){
echo $selection . ", ";
}