Form Handling .php not working in wordpress

I insert a form in my blog post

This code is inserted in the post

<form action="welcome.php" method="post">
Name: <input type="text" name="name"><br>
E-mail: <input type="text" name="email"><br>
<input type="submit">
</form>
Copy code

name andemail text fields and a submit button.After that is create a welcome.php file.

welcome.php file code is as following.

<?php get_header(); ?>
Welcome <?php echo $_POST["name"]; ?><br>
Your email address is: <?php echo $_POST["email"]; ?>
<?php get_sidebar('single'); ?>
<?php get_footer(); ?>
Copy code

but when i fille name and email in text filed and click on submit button. http://tectrick.org/welcome.php not found error and form is not processed