How to add php to wordpress form

Issue

I'm having a very hard time trying to get a php code integrated into a form I've created on wordpress. I've trying 3 different php plugins to no avail. Here is the html and css. Does anyone have any idea where I should be putting the php on wordpress and how I should properly call it through the "action" in the form?

css:

<style>
  input[type=text], input[type=number], select[name=province]{ font-family: arial; width:100%;  
  border: 1px solid #E5E5E5; padding: 10px 20px;}
input[name=ffirstname] {width:49%; margin-right:1%; }
input[name=lastname] {width:49%; margin-left:1%; }
input[name=address] {width:65.6667%; margin-right:1%; }
input[name=unit] {width:32.3337%; margin-left:1%; }
input[name=city] {width:49%; margin-right:1%; }
select[name=province] {width:24%; margin-left:1%;}
input[name=postal] {width:24%; margin-left:1%; }
input[name=email] {width:49%; margin-right:1%; }
input[name=phone] {width:49%; margin-left:1%;}
input[class=submit] {
  background-color: #f05a28;
  color: white;
  padding: 8px 20px;
  margin-left: 85%;
  border-radius: 4px;
  border: none; !important;
  outline: none; !important ;
  cursor: pointer;
  box-shadow: none; !important;
}
</style>

html:

<form name"infoform" method="post" action="form-to-email.php" >
  <br><input type="text" name="ffirstname" placeholder="First Name"/><input type="text" name="lastname" placeholder="Last Name"/>
  <br><br><input type="text" name="address" placeholder="Address"/><input type="text" name="unit" placeholder="Unit"/></br>
  <br><input type="text" name="city" placeholder="City"/><select name="province" form="form1">
<option value="ab">AB</option>
  <option value="BC">BC</option>
  <option value="BC">MB</option>
  <option value="NB">NB</option>
<option value="NL">NL</option>
<option value="NS">NS</option>
<option value="ON">ON</option>
<option value="PE">PE</option>
<option value="QC">QC</option>
<option value="SK">SK</option>
</select><input type="text" name="postal" placeholder="Postal Code"/></br>
<br><input type="text" name="country" placeholder="Country"/></br>
<Br><input type="text" name="email" placeholder="Email"/><input type="number" name="phone" placeholder="Phone#"/></br>
<br> <br><input type="submit" value="Next"/>

php:

<?php

$name = $_POST['ffirstname'];
$email = $_POST['lastname'];
$message = $_POST['address'];

$to = "joeblow@hotmail.com"; 
$subject = "My contact form";   
$body = " You have received a new";
mail($to,$subject,$body);

?>

Solution

Usually I use footer.php to add JS and PHP code, just before the closing tag of the body. But if that does not work try using header.php. Maybe your code needs to be included before the end. The HTML part you can put inside a page or post without a problem.

If you want to use a plug-in, you can easily do that with Contact form 7.

Check here and here for tutorials.

UPDATE - to add PHP code into Wordpress:

You can add the code between <?php tags, so open your header.php, footer.php or page.php and write your code inside the tag

<?php

//PHP Code here

?>

This way you will see this code in every Wordpress page on your site.

Header and footer are always included on all pages. If you only need it in post or page use page.php or post.php

Answered By - Marco Romano