用php提交表单后如何返回上一页？

Question

I have a form in html whose "action" attribute calls a contact.php file. The problem is that after I submit the form, the file that is visible is a blank page with the address contact.php and I want to see again the form of the main page.

HTML:
<form id="myForm" action="php-contact/contact.php"
                       method="post" class="contact_form" autocomplete="off"
                       role="form">
                          <div class="form-group">
                            <label for="input-subject">subject</label>
                            <input name="subject" type="text" class="form-control" id="subject" placeholder="your subject" maxlength="20"/>
                          </div>

                          <div class="form-group">    
                              <label for="input-name">name</label>
                              <input name="name"  type="text" class="form-control" id="name" placeholder="your name" maxlength="20"/>
                          </div>

                          <div class="form-group">    
                            <label for="input-email">email address</label>
                            <input name="email"  type="text" class="form-control" id="email" placeholder="your email" maxlength="40"/>
                          </div> 

                          <div class="form-group" >   
                              <label for="input-message">message</label>
                              <textarea name="message" cols="10" rows="10"  class="form-control" id="comment" ></textarea>
                          </div>  

                          <button name="myFormSubmitted" type="submit" class="btn btn-primary btn-lg btn-block">send</button>
                      </form>

PHP:
  <?php
  $name = $_POST['name'];
  $email = $_POST['email'];
  $subject = $_POST['subject'];
  $message = $_POST['message'];

  $to = "pep.g@gmail.com";
  $message = '
  name: '.$name.'
  email: '.$email.'
   message: '.$message.'
  ';

 $headers = 'From: pep.website@website.com';

   if (
    mail($to, $subject, $message, $headers)
) 
      echo"<script>alert('message send succesfully')</script>";
   else
      echo"<script>alert('message not send')</script>";

 ?>

Answer 1

Use either $_SERVER["HTTP_REFERER"] or use a hidden field on the form with the url of the current page:

<form action="myAction.php">
    <input type="hidden" name="destination" value="<?php echo $_SERVER["REQUEST_URI"]; ?>"/>
    <!-- other form inputs -->
    <input type="submit"/>
</form>

myAction.php

<?php
  /* Do work */
  if(isset($_REQUEST["destination"])){
      header("Location: {$_REQUEST["destination"]}");
  }else if(isset($_SERVER["HTTP_REFERER"])){
      header("Location: {$_SERVER["HTTP_REFERER"]}");
  }else{
       /* some fallback, maybe redirect to index.php */
  }

And then even then you should have fallbacks in case for some reason the client isn't respecting HTTP redirects, like some redirect javascript, a meta redirect and a link to the destination.

Answer 2

Add a JS redirect after your alert then

echo "<script>
             alert('message sent succesfully'); 
             window.history.go(-1);
     </script>";

Answer 3

In your contact.php file, just use something like at the end of the PHP code:

header("location:yourfilenamehere.php");    

This will redirect back to whatever page you specify.

Answer 4

You could do two things...

1) Have your php logic in the form file and submit to that file. On the top of the file, put something like:

if(isset($_POST['name'])) {
// your sending logic
}

followed by your form.

2) use the header() function to redirect to your form.

header("Location: form.html"); 

Answer 5

I feel pretty bad about posting this answer as it is just concatenating two other SO answers.

First part

Charlie74's answer on this page

// add the message you want to show to the user
header("Location: yourfilenamehere.php?alertmsg=message+send+succesfully"); 
exit();

Second part check for the alertmsg name in the query string

See SO post for getParameterByName:

function getParameterByName(name) {
    name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
    var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
        results = regex.exec(location.search);
    return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}

in the page you are redirecting call the getParameterByName function:

<script>
var msg = getParameterByName('alertmsg');

if (alertmsg.length > 0) {
    alert(msg);
}
</script>