PHP :unable to check if a form is submitted

Question

I am using a form in php file inside a modal window like this

 <div class="modal-body">
                <form  method="post" action="m.php">
                    <div class="form-group">
                        <lable>Name</lable>
                        <input type="text" class="form-control" required="required">
                    </div>

                    <div class="form-group">
                        <lable>Email</lable>
                        <input type="text" class="form-control" required>
                    </div>

                    <div class="form-group">
                        <lable>Details</lable>
                        <input type="text" class="form-control" required>
                    </div>

                    <div class="form-group">
                        <lable>Message</lable>
                        <textarea name="" id=""  class="form-control"></textarea>
                    </div>
                     <div class="form-group">
                        <a href="" class="btn btn-default" name="submit" style=" background: #eee; width:100px;display: block;margin-left:auto;">Submit</a>
                    </div>
                </form>
            </div>

file name is m.php now when i press the submit button it doesn't detect form submission

<?php

if( ($_SERVER['REQUEST_METHOD'] == 'POST')){
    die("form submitted");
}

?>

i tried $_POST['submit'] as well kindly help me whats wrong with it

Martijn · Accepted Answer · 2017-08-23 07:18:53Z

5

This is because you dont press a submit button, you press a link called submit. Try replacing it with <input type="submit" value="Submit" />.

Also, your check wether your form has been submitted uses a dangerous method. If you have multiple forms to be handled in your code, it will catch them all. A better approach would be:

if( isset($_POST['nameOfSubmitbutton']) ){}
// because you can now easily do:
if( isset($_POST['completelyDifferentButton']) ){}

If you want to keep the anchor (I advice against it), you can use javascript to fake the submit for you:

document.getElementById('yourAnchor').onclick = function(){
    document.getElementById('yourForm').submit();
}
// Or if you have jQuery:
$('#yourAnchor').on('click', function(e){
    e.preventDefault();
    $(this).closest('form').submit();
});

edited Aug 23, 2017 at 7:18

answered Aug 22, 2017 at 8:27

Martijn

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2 Comments

Yamen Nassif Over a year ago

or using JQuery $(".submit").on("click",function(e){ e.preventDefault(); $("form").submit() };

Martijn Over a year ago

I've added a jquery version as well, slightly better (note the closest())

Yamen Nassif · Accepted Answer · 2017-08-22 08:28:56Z

1

The submit button you are using is pointing towards the same url, can you try something like?

<input class="btn btn-default" type="submit" value="Submit">

and then try to see if the form is submitted from PHP. And i also would recommend that you use some framework for this to handle sql injections and/or other exploits.

answered Aug 22, 2017 at 8:28

Yamen Nassif

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2 Comments

Sikander Over a year ago

i use ci this was a project i was supposed to do changes , actually i forgot to do it in custom because of doing with ci and laravel since so long :D

Yamen Nassif Over a year ago

ci is perfect for this, codeigniter.com/userguide3/helpers/form_helper.html

Harpreet Singh · Accepted Answer · 2017-08-22 08:30:19Z

1

Wrong use of form submit.

 <div class="form-group">
                    <a href="" class="btn btn-default" name="submit" style=" background: #eee; width:100px;display: block;margin-left:auto;">Submit</a>
 </div>

You should use it like:-

<div class="form-group">
      <input type="submit" class="btn btn-default" name="submit" style="background: #eee; width:100px;display: block;margin-left:auto;" value="Submit"/>
</div>

Hopefully this will solve the issue.

answered Aug 22, 2017 at 8:30

Harpreet Singh

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