Question

好的我想把这个表单放到哪里，如果有人跳过表单上的内容，它会出现并告诉他们。我是一个新手，如果有人不输入信息，我不知道怎么会出现这个错误。这就是我所拥有的

  <?php
 function showForm($strMessage){
echo "<h1>".$strMessage."</h1>";
echo " <p>Note: fields marked with '*' are required</p>\n";
echo "<form action=\"".$_SERVER['PHP_SELF']."\" method=\"post\">\n";
echo "<table width=\"45%\" class=\"formtable\" cellpadding=\"3\" cellspacing=\"0\">\n";
echo "  <tr>\n";
echo "      <td><span id=\"rfvname\">* Name:</span></td>\n";
echo "      <td><input type=\"text\" name=\"name\"   value=\"".$_POST['name']."\"  /></td>\n";
echo "  </tr>\n";
echo "    <tr>\n";
echo "      <td><span id=\"rfvemail\">* E-mail:</span></td>\n";
echo "      <td><input type=\"text\" name=\"email\" value=\"".$_POST['emial']."\" /></td>\n";
echo "  </tr>\n";
echo "      <tr>\n";
echo "      <td><span id=\"rfvusername\">* Username:</span></td>\n";
echo "      <td><input type=\"text\" name=\"username\" value=\"".$_POST['username']."\" /></td>\n";
echo "  </tr>\n";
echo "  <tr>\n";
echo "        <td><span id=\"rfvpword\">* Password:</span></td>\n";
echo "        <td><input type=\"password\" name=\"pword\" value=\"".$_POST['pword']."\" /><br /><span style=\"font-size:9px;\"><em>(at least 4 chars) </em></span></td>\n";
echo "  </tr>\n";
echo "    <tr>\n";
echo "      <td><span id=\"rfvpword\">* Re-enter Password:</span></td>\n";
echo "      <td><input type=\"text\" name=\"repword\" value=\"".$_POST['repword']."\" /></td>\n";
echo "  </tr>\n";
echo "  <tr>\n";
echo "         <td>&nbsp;</td>\n";
echo "         <td><input type=\"submit\" value=\"Submit\" class=\"btnSubmit\" id=\"btnSubmit\" name=\"submit\" /></td>\n";
echo "  </tr>\n";
echo "</table>\n";
echo "</form>\n";
 }
 ?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1  /DTD/xhtml1-strict.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
 <head>
 <title>Contact Form</title>
  <style type="text/css">
   body{
        background-color:#FFBD40;
        color:#000000;
        font-size:100%;
        font-family:Georgia,Verdana,"Times New Roman",sans-serif;
     }


    #container{
        background:#FFF573;
        width:800px;
        margin:auto;
        padding:5px 10px 5px 10px;
        border:6px double #000000;
      }
       </style>
  </head>
  <body>
  <div id="container">
   <?php
   if (isset($_POST['submit'])){
  if (trim($_POST['name'])==""){
    $strMessage="Please enter your name!";
    showForm($strMessage);
   }
   elseif (strlen(trim($_POST['pword']))<=3){
    $strMessage="Your password must be at least 4 characters long!";
    showForm($strMessage);
  }
    else{
     $strMessage="Thank you, your information has been submitted. Below is the information you sent:";
     $strMessageBody.="Name: ".trim(stripslashes($_POST['name']))."<br />";
     $strMessageBody.="E-mail: ".trim(stripslashes($_POST['email']))."<br />";
     $strMessageBody.="UserName: ".trim(stripslashes($_POST['username']))."<br />";
     $strMessageBody.="Password: ".trim(stripslashes($_POST['pword']))."<br />";
     $strMessageBody.="Re-enter Password: ".trim(stripslashes($_POST['repword']))."<br />";
    echo "<h1>".$strMessage."</h1>";
    echo $strMessageBody;
}
   }
 else{
$strMessage= "Please fill out the form below to send your information:";
showForm($strMessage);
}
   ?>php
    $$errors = array();
    if (isset($_REQUEST["seen_already"])){
    validate_data();
    if(count($errors) ! = 0){
    display_errors();
    display_welcome();
    } else {
    display_welsome();
    }
    function validate_data()
    {
    global $errors;
    if($_REQUEST["Name"]==""){
    $errors[] = "<FONT COLOR='RED'>Please enter your first name</FONT>";
    }
    if($_REQUEST["E-mail"]==""){
    $error[] = "<FONT COLOR='RED'>Please enter your E-Mail>/FONT>";
    }
    if($_REQUEST["UserName"]==""){
            $errors[] = "<FONT COLOR='RED'>Please enter your Username</FONT>";
    }
    if($_REQUEST["Password"]==""){
            $errors[] = "<FONT COLOR='RED'>Please enter your Password</FONT>";
    }
    if($_REQUEST["RE-enter Password"]==""){
            $errors[] = "<FONT COLOR='RED'>Please  re-enter your Password</FONT>";
    }
   }
   function display_errors()
   {
      global $errors;

      foreach($errors as $err){
        echo $err, "<BR>";
        }
      }
      function process_data()


 </div>
  </body>
  </html>

回声和“和”是我必须如何设置这一切。所以我想这就是这样。我要问的是，是否有人可以帮助我理解如何处理错误代码。为我做这件事，但帮助我理解它。我已经开始的代码是否会起作用或者我把它搞砸了。感谢任何投票给我的人。我只是问一个简单的问题。

Answer 1

你的问题是：

 $_REQUEST["RE-enter Password"]

您使用了表单字段的文本标签。但是您的实际输入字段称为：

 $_REQUEST["repword"]

同样适用于所有其他领域。 $_REQUEST数组根据HTML表单中的name=属性保存键。

其他：您还可以简化表单输出。您应使用heredoc string来避免许多echo dquotes和"反斜杠转义，而不是使用\个echo <<<HTML <h1>$strMessage</h1> <p>Note: fields marked with '*' are required</p> <form action="$_SERVER[PHP_SELF]" method="post"> <table ... <td><span id="rfvname">* Name:</span></td> <td><input type="text" name="name" value="$_POST[name]"></td> ... HTML;。

$_POST = array_map("htmlentities", $_POST);

在此之前添加{{1}}（为了简单/安全）。

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