I can’t explain why this was so difficult, but it kicked my butt for weeks. I needed to create a simple form and then submit to a new page.

This is the simple form:

This is the snippet

// code for the form
	$form_html = '
		<style type="text/css">
			<!--
			 .label { font-size: 100%;
				     font-size: large;
				     font-family: Arial, Helvetica, sans-serif;
					 text-decoration: underline;
				  }
			 .content { margin-left: 60px;
			 		font-size: x-large;
					font-family: Arial, Helvetica, sans-serif;
				  }
			 .button {font-size: x-large;
					font-family: Arial, Helvetica, sans-serif;
					position: relative;
  					left: 50%;
  					transform: translateX(-50%); 

				  }
			
				-->
		</style>
		
		<form method="post" action="/wordpress-form-receive/" >
			 <p class="label">First Name:</p>
  				<input type="text" name="firstname" value="Mickey"><br>
  			<p class="label">Last Name:</p>
  				<input type="text" name="lastname" value="Mouse"><br><br>
 
		<input type="submit" class="button" value="Submit">
	
		</form>	';
	
//MOST IMPORTANT PIECE
	echo $form_html;