Question

我是PHP的新手，我有一个项目要完成，作为一个更大的项目的一部分，为大学创建一个网站。

我正在尝试在HTML页面中使用POST方法将数据发送到名为user的类。

如果用户在输入框中输入了文本，则输出显示名称的标记，否则
如果变量上的isset()方法return false，PHP将echo "notset";。

这看起来很简单，但无论我做什么，我都无法将输入的数据输入到输入框中，我不断返回“未设置”。

表单HTML

<form method="post" action="user.php">
<table cellpadding="5">
 <tr>
  <td><label for="firstname">Enter Firstname:</label></td>
  <td><input type="text" id="firstname" name="firstname" /><br /></td>
 </tr>  
 <tr>
  <td><label for="surname">Enter Surname:</label></td>
  <td><input type="text"   id="surname" name="surname" /><br /></td>
 </tr>
<tr>
  <td> <label for="email">Email Address:</label></td>
  <td><input type="text" id="email" name="email" /><br /></td>
 </tr>
<tr>
  <td><label for="password">Enter Password:</label></td>
  <td><input type="password" id="password" name="password" /><br /></td>
 </tr>
<tr>
  <td><label for="renter">Re-Enter Password:</label></td>
  <td><input type="password" id="renter" name="renter" /><br /></td>
 </tr>
<tr>
  <td><label for="address1">Address Line 1:</label></td>
  <td><input type="text" id="address1" name="address1" size="35"/><br /></td>
 </tr>
<tr>
  <td><label for="address2">Address Line 2:</label></td><td><input type="text"    id="address2" name="address2" size="35"/><br /></td>
 </tr>
<tr>
  <td><label for="city">City:</label></td>
  <td><input type="text" id="city" name="city" /><br /></td>
 </tr>
<tr>
  <td><label for="postcode">Postcode:</label></td>
  <td><input type="text" id="postcode"     name="postcode" /><br /></td>
 </tr>
<tr>
  <td><label for="country">Country:</label></td>
  <td><input type="text" id="country" name="country" /><br /></td>
 </tr>
 <tr>
  <td><input type="submit" value="Submit Details" name="submit" class="button1"/></td>
</table>
</form>

我想先在页面上打印input name="firstname";然后我会开始担心其他一切。以下是我的class以及我用来打印firstname。

的更多HTML

结果HTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head></head
<body>
<p>thank you! user has been created</p>
<?php

$newuser = new user();
$theuser = $newuser->getfirstname();

echo $theuser;

?>
</body>
</html>

用户CLASS

<?php

class user
{
    public $email;
    public $firstname;
    public $lastname;
    public $connection;

    function _construct()
    {
        $this->firstname= $_POST['firstname'];
        $this->lastname = $_POST['lastname'];
        $this->email=$_POST['email'];
    }

    public function  getfirstname()
    {
        if(isset($firstname))
        {
            return $this->firstname;
        }
        else
        {
            return "not set";
        } 
    }
}

?>

Answer 1

正如评论者提到的那样，如果你改变了，你的代码应该有用：

if(isset($firstname)) // This isn't Java...

为：

if(isset($this->firstname)) // ... you need $this->

以及：

_construct() // Not one _

为：

__construct() // But two __

见：

<?php

class user
{
    public $email;
    public $firstname;
    public $lastname;
    public $connection;

    function __construct()
    {
        $this->firstname = $_POST['firstname'];
        $this->lastname = $_POST['lastname'];
        $this->email = $_POST['email'];
    }

    public function getfirstname()
    {
        print_r($this);
        if(isset($this->firstname))
        {
            return $this->firstname;
        }
        else
        {
            return "not set";
        } 
    }

}

http://jfcoder.com/test/oopuser.php

修改

同样请注意，使用table进行布局被认为是一种旧的，糟糕的方法。例如，下面是使用UL和CSS的方法。这在FF和Chrome中效果很好，但在IE中却很糟糕（我认为由于某些选择器）。但是，本教程可以解释整体方法：

http://www.alistapart.com/articles/prettyaccessibleforms

<强> CSS

#register { width: 28em; background: #ddd; } #register ul, #register li { margin: 0; padding: 0; } #register li { margin: 0 0 1px; list-style-type: none; background: whiteSmoke; display: auto; } #register li:after { content: "."; display: block; height: 0; clear: both; visibility: hidden; } #register label { float: left; width: 8em; clear: both; } #register input[type=text], #register input[type=password] { width: 12em; } #register input[type=text].address { width: 100%; } #register label, #register .data, #register-submit { padding: .5em; margin: 0; } #register .data { float: left; margin: 0; width: 18em; } #register-submit { clear: both; text-align: right; } #register hr { height: 1px; background: #bbb; border: 0; }

<强> HTML

<form id="register" method="post" action="oopuser.php"> <h1>Registration Form</h1> <ul> <li> <label for="firstname">Enter Firstname:</label> <span class="data"> <input type="text" id="firstname" name="firstname" /> </span> </li> <li> <label for="surname">Enter Surname:</label> <span class="data"> <input type="text" id="surname" name="surname" /> </span> </li> <li> <label for="email">Email Address:</label> <span class="data"> <input type="text" id="email" name="email" /> </span> </li> <li> <label for="password">Enter Password:</label> <span class="data"> <input type="password" id="password" name="password" /> </span> </li> <li> <label for="renter">Re-Enter Password:</label> <span class="data"> <input type="password" id="renter" name="renter" /> </span> </li> <li> <label for="address1">Address Line 1:</label> <span class="data"> <input type="text" id="address1" name="address1" class="address"/> </span> </li> <li> <label for="address2">Address Line 2:</label> <span class="data"> <input type="text" id="address2" name="address2" class="address"/> </span> </li> <li> <label for="city">City:</label> <span class="data"> <input type="text" id="city" name="city" /> </span> </li> <li> <label for="postcode">Postcode:</label> <span class="data"> <input type="text" id="postcode" name="postcode" /> </span> </li> <li> <label for="country">Country:</label> <span class="data"> <input type="text" id="country" name="country" /> </span> </li> <li id="register-submit"> <input type="submit" value="Submit Details" name="submit"/> <input type="reset" value="Reset" name="reset"/> </li> </ul> </form>

http://jsfiddle.net/JWUC9/

没有从类中获取POST数据

1 个答案: