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PHP开发中接收复选框信息的方法_PHP

Jun 01, 2016 pm 12:29 PM
name information develop take over method form

PHP接收多个同名复选框信息不像ASP那样自动转换成为数组,这给使用带来了一定不便。但是还是有解决办法的,就是利用javascript做一下预处理。多个同名复选框在javascript中还是以数组的形式存在的,所以在表单提交之前可以利用javascript把复选框中的信息组合成一个字符数组赋值给表单中的隐藏元素,然后用PHP中的explode函数解析此数组,这样就可以实现复选框信息的传递了。下面举例说明。

  假设有这样一个表单:

<form name="form1" id="form1" method="post" action="myphp.php" onSubmit="return Checker()">
<input type="checkbox" name="item" value="1">1<br>
<input type="checkbox" name="item" value="2">2<br>
<input type="checkbox" name="item" value="3">3<br>
<input type="checkbox" name="item" value="4">4<br>
<input type="hidden" name="items" value="">
<input type="submit" value="Submit">
</form>


  这个表单有四个名字都是item的复选框,当用户单击Submit按钮的时候,Checker函数会被调用,并且如果Checker返回true表单就被提交,返回false表单就不会被提交。这里Checker函数就是我们要编写的预处理函数。在HTML的header部分添加下面的javascript:

<script language="javascript">
<!--
function Checker()
{
 form1.items.value = "";
 if ( !form1.item.length ) // 只有一个复选框,form1.item.length = undefined
 {
  if ( form1.items.checked )
   form1.items.value = form1.item.value;
 }
 else
 {
  for ( i = 0 ; i < form1.item.length ; i )
  {
   if ( form1.item(i).checked ) // 复选框中有选中的框
   {
    form1.items.value = form1.item(i).value;
    for ( j = i 1 ; j < form1.item.length ; j )
    {
     if ( form1.item(j).checked )
     {
      form1.items.value = " "; //用空格做分割符
      form1.items.value = form1.item(j).value;
     }
    }
    break;
   }
  }
 }
 return true;
}
-->
</script>


  这样就可以把所有选中的复选框的value组合成为一个字符串数组,在myphp.php使用这样的语句:

$items = explode(" ", $HTTP_POST_VARS["items"]);


  就可以把这些选项分离出来成为数组。需要注意的是选项中的value不能包含分割符(这里是空格)。
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