在php中处理一个表单的多个输入 [英] Handle multiple inputs of a form in php

问题描述

我想知道如何处理来自具有多个属性的表单的多个输入。
此代码生成我的字段：

 < form method =POSTaction =test5.phpid = 1 > 
 <？ 
 if（$ _ SESSION [peoplecount]！= 0）{
 for（$ i = 0; $ i< = $ _SESSION [peoplecount]; $ i ++）{
 echo'Name< input type =textname ='。$ i。'>成人< input type =radioname ='。$ i。'value =adult/>次要< input type =radioname ='。$ i。'value =minor/> <峰; br />; 
}} 
？> 
< input class =buttontype =submitvalue =I / We Agreestyle =width：200px;/> 
< / form> 
  

一旦提交 - 或test5.php在action部分中提及，

  foreach（$ _POST as $ key => $ value）{
 print{$ key}：{$ value} < br />; 
} 
  

并且输出是

  0：成人
 1：成人
 2：成人
 3：成人
  

注意它有0,1,2 ......然后是成人。它甚至没有提到来自文本输入的人的名字。
我可以将表单改为：

 < / blockquote> 
< form method =POSTaction =test5.phpid =1> 
 <？ 
 if（$ _ SESSION [peoplecount]！= 0）{
 for（$ i = 0; $ i< = $ _SESSION [peoplecount]; $ i ++）{
 echo'Name< input type =textname =usersnameid =usersname>成人< input type =radioname =agevalue =adultid =age/>次要< input type =radioname =agevalue =minorid =age/> <峰; br />; 
}} 
？> 
< input class =buttontype =submitvalue =I / We Agreestyle =width：200px;/> 
< / form> 
  

使用相同的test5.php，我可以得到

 用户名：
年龄：成人
  

年龄的值不会发布，并且test5.php中的foreach循环结束，因此线返回，直到它完全贯穿一个完整的帖子。

我希望我做了足够好的工作解释。
我希望我的输出是：

SomeName成人

SomeOtherName小
....

解决方案

你的问题是你正在创建两个名字的输入='$ i'，第二个（单选按钮）覆盖第一个。我会建议你使用一个包含 $ i 的字符串来建立名称属性：

  for（$ i = 0; $ i< = $ _SESSION [peoplecount]; $ i ++）{
 echo'Name< input type =textname =name-'。 $ I'>。成人< input type =radioname =age  - '。$ i。'value =adult/>次要< input type =radioname ='。$ i。'value =minor/> <峰; br />; 
 
 $ / code> 

现在您的 $ _ POST 数组看起来像：



 名字-0：somename age-0：成人
名字-1：其他名字年龄-1：小
 ... 
  

更好的处理方式是使用数组作为表单名称属性，使用 [] （注意，为了避免所有额外的连接和复杂的引用，我在这里切换到了双引号。）

  for（$ i = 0; $ i <= $ _SESSION [peoplecount]; $ i ++）{
 echoName< input type ='text'name ='name [$ i]'> Adult< input type ='radio'name ='age [$ i]'value ='adult'/> Minor< input type ='radio' name ='age [$ i]'value ='minor'/>< br />; 
 
 $ / code> 

在这种情况下，您的 $ _ POST 看起来像：



  name：Array（
 0：somename，
 1：othername 
），
 age：Array（
 0：adult，
 1：minor 
）
  

要访问它们，您可以像这样使用 foreach 循环：

  foreach（$ _POST ['name'] as $ key => $ name）{
 echo名称：$ name年龄：{$ _POST ['age ] [$关键]}; 
} 
  




I want to know how to handle multiple inputs from a form with multiple atributes. This code generates my fields:

<form method="POST" action="test5.php" id="1">
            <?
            if($_SESSION["peoplecount"] != 0){
            for ($i = 0; $i <= $_SESSION["peoplecount"]; $i++) {
             echo ' Name<input type="text" name="'.$i.'">  Adult<input type="radio" name="'.$i.'" value="adult" /> Minor<input type="radio" name="'.$i.'" value="minor" /> <br/>';
            }           }
            ?>
            <input class="button" type="submit" value="I/We Agree" style="width:200px;"/>
            </form>

once submitted -- or test5.php as its mentioned in the "action" part,

foreach ($_POST as $key => $value) {
  print "{$key}: {$value}<br />";
}

and the output is

0: adult
1: adult
2: adult
3: adult

Notice it has 0, 1, 2... and then adult. It does not even mention the name of the person from the text input. I can alter the form to:

        </blockquote>
        <form method="POST" action="test5.php" id="1">
        <?
        if($_SESSION["peoplecount"] != 0){
        for ($i = 0; $i <= $_SESSION["peoplecount"]; $i++) {
         echo ' Name<input type="text" name="usersname" id="usersname">  Adult<input type="radio" name="age" value="adult" id="age"/> Minor<input type="radio" name="age" value="minor" id="age"/> <br/>';
        }           }
        ?>
        <input class="button" type="submit" value="I/We Agree" style="width:200px;"/>
        </form>

Using the same test5.php, I get

usersname:
age: adult

The value of the age is not posted and the the foreach loop in test5.php ends, hence the line return, before it completly runs through one complete post.

I hope I did a good enough job explaining. I want my output to be:

SomeName Adult

SomeOtherName Minor ....

解决方案

Your problem is that you are creating two form inputs with name='$i', and the second one (the radio button) is overwriting the first. I would suggest instead that you use a string including $i to build the name attributes:

for ($i = 0; $i <= $_SESSION["peoplecount"]; $i++) {
    echo ' Name<input type="text" name="name-'.$i.'">  Adult<input type="radio" name="age-'.$i.'" value="adult" /> Minor<input type="radio" name="'.$i.'" value="minor" /> <br/>';
}

Now your $_POST array will look like:

name-0: somename age-0: Adult
name-1: othername age-1: Minor
...

An even better way to handle it is to use arrays as form name attributes with [] (Note I've switched to double-quotes here, to avoid all the extra concatenation and complicated quoting.)

for ($i = 0; $i <= $_SESSION["peoplecount"]; $i++) {
   echo " Name<input type='text' name='name[$i]'>  Adult<input type='radio' name='age[$i]' value='adult' /> Minor<input type='radio' name='age[$i]' value='minor' /> <br/>";
}

In this case, your $_POST looks like:

name: Array(
 0: somename,
 1: othername
),
age: Array (
 0: adult,
 1: minor
)

To access them, you can use a foreach loop like so:

foreach ($_POST['name'] as $key=>$name) {
  echo "Name: $name  Age: {$_POST['age'][$key]}";
}

这篇关于在php中处理一个表单的多个输入的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！