Checkbox not being sent in POST using PHP

问题

I have a checkbox and it is not being sent to the call back page using POST. I've read that it needs a value, and I supplied that, but am not sure what else could be wrong. Here's the checkbox code I am currently using. Smarty is being used here.

{foreach from=$all_splash_carriers item=item}
            <tr>
                    <td class="evp">{$item.carrier}:</td>
                    <td><input name="{$item.splash_carriers_id}.splashcarrier.{$item.carrier_id}" value="{$item.url}"/><input type="checkbox"  name="{$item.carrier_id}.checkbox" value="1" {if $item.activated == '1'}checked{/if}/>Activated</td>

            <tr>
{/foreach}

回答1:

The checkbox is not sent if it is not checked.

Also, PHP silently converts any dots in names to underscores, because otherwise the "register_globals" mode would render inaccessible global variables.

回答2:

if $item.activated == '1'

should be

if ($item.activated == '1')

来源：https://stackoverflow.com/questions/15753677/checkbox-not-being-sent-in-post-using-php