Question

我有一个表单，其中的操作链接到同一个PHP页面contact.php。我在表单中有所有服务器端验证，一切都很好。它将用户重定向到同一页面，并在制作表格STICKY（这是使用同一页面的错误的主要点）时根据需要回显错误消息。

如果表单没问题，我希望有一个成功的页面重定向。我已经阅读了有关如何实现这一点的其他帖子，但我不太明白如何在我的代码中实现它。

<?php
$fullname = $email = $reason = $contactbox = '';
$fullnameerr = $emailerr = $reasonerr = $contactboxerr = '';

if(data_post('submit')){
  if(empty(data_post('firstname'))){
    $fullnameerr = "Please enter a valid name";
  }

  else {
    $fullname = clean_data(data_post('firstname'));
    if (!preg_match("/^[a-zA-Z '']*$/", $fullname)){
      $fullnameerr = "Please enter only alphabetical characters and white spaces";
    }
  }

  if(empty(data_post('email'))){
    $emailerr = "Please enter a valid e-mail";
  }
  else {
    $email = clean_data(data_post('email'));
    if (!filter_var($email, FILTER_VALIDATE_EMAIL)){
      $emailerr = "Please enter a correct e-mail format (ex 'joe@cornell.edu')";
    }
  }

  if(empty(data_post('reason'))){
  $reasonerr = "Please select a reason for contact";
}
  else{
    $reason = clean_data(data_post('reason'));
  }

  if(empty(data_post('contacttext'))){
    $contactboxerr = "Please elaborate on your reason"; 
  }
  else{
    $contactbox = clean_data(data_post('contacttext'));
    if(!preg_match("/^[\w\S\s]*$/", $contactbox )){
      $contactboxerr = "Please enter only valid characters you would use in writing (ex 'abcABC123')";
    }

    if(strlen($contactbox) > 2000){
      $contactboxerr = "Please enter a response with with a max of 2000 characters.";
    }
  }
}

function clean_data($field){
  $field = trim($field);
  $field = stripslashes($field);
  return $field;
}

function data_post($param){
  if (isset($_POST[$param])){
    return $_POST[$param];
  }
  else{
    return '';
  }
}
?>

这是表格的代码：

<div class="sidesection" id="survey">
<h3>Contact Form</h3>
<form action="contact.php" method="POST" novalidate>
<span class="required_asterick">* Is Required</span>
  <fieldset>
  <legend>Contact Us</legend>
  <span class="required_asterick">* </span><label>Name:</label><span class="help" data-tooltip="Please enter a valid name (Ex. 'John Doe')"></span><br />
  <input type="text" name="firstname" required pattern="[a-zA-Z '']+" maxlength="25" title="Enter only characters from (a-z) and (A-Z)" value="<?php echo "$fullname";?>"><span class="errormessage"><?php echo "$fullnameerr";?></span><br /><br />

  <span class="required_asterick">* </span><label>Email:</label><span class="help" data-tooltip="Please enter a valid email with a max of 50 characters. (Ex. 'xxx@yyy.com')"></span><br />
  <input type="email" name="email" required maxlength="50" value="<?php echo "$email";?>">
  <span class="errormessage"><?php echo "$emailerr"; ?></span><br /><br />

  <span class="required_asterick">* </span><label>Reason For Contact:</label>
  <select name="reason" required>
    <option value=""> </option>
    <option value="general">General</option>
    <option value="concern">Concern</option>
    <option value="feedback">Feedback</option>
  </select><span class="help" data-tooltip="Choose a topic for which you are contacting us so we can process your request faster. General is for any broad topics not listed. Concern is for any pressing matter you may have about the Ithaca Apple Harvest Festival. Feedback is for any suggestions or opinions you wish to share with us about our festivals. "></span><span class="errormessage"><?php echo "$reasonerr";?></span><br /> <br />

  <span class="required_asterick">* </span><label>What Would You Like To Tell Us?</label><span class="help" data-tooltip="Use this section to write what you are contacting us for."></span><br />
  <textarea name="contacttext" rows="7" cols="60" required><?php echo "$contactbox";?></textarea><span class="errormessage"><?php echo "$contactboxerr"; ?></span><br />
  <input type="submit" value="Submit" name="submit">
  </fieldset>
</form>

你可以看到我通过向错误添加回声来使表单变粘，所以如果有错误我想保留它。但是，如果成功，则重定向到成功页面。

Answer 1

只检查您是否没有错误（即您的错误变量为空）并使用header()

$fullname = $email = $reason = $contactbox = '';
$fullnameerr = $emailerr = $reasonerr = $contactboxerr = '';

if(data_post('submit')){

    // your validations go here
    // ......

    if (empty($fullnameerr) && empty($emailerr) && empty($reasonerr) && empty($contactboxerr)) {
         header('Location: success.php');
    }

}

Answer 2

您没有控件来检查验证是通过还是失败。作为建议用户使用布尔变量来表示它：

if(data_post('submit')){

    $valid=true;
    if(empty(data_post('firstname'))){
        $fullnameerr = "Please enter a valid name";
        $valid=false;
    }
    if(empty(data_post('email'))){
        $emailerr = "Please enter a valid e-mail";
        $valid=false;
    }

    //other validations
    if($valid){
         //validation passed
         header('Location: destination.php');
    }
}

Answer 3

除了@Deimoks的回答，你可能需要在调用header（）函数后调用exit();。如果在头重定向之后有任何代码，即使您请求重定向，它仍然可以执行。 exit()阻止了这一点。另外，如果您收到“已发送标头”错误，请查看output buffering。

如果服务器验证为肯定，则将页面重定向到“成功”页面

3 个答案: