PHP Form Acelle Sub

php-form-acelle.php

<?php
	$button_text = 'I am in!';
	$error = 'Please enter valid email address';
	$email_exists_msg = 'This email is taken, please use another.';
	$welcome_msg = 'Congratulations, your registration is sucessful!';
?>

<div style="max-width:400px;display:grid;grid-template-columns:1fr 1fr;grid-gap:20px;align-items:center;" id="ssrm-list-main-form" data-api="{{YOUR_API_KEY}}" data-list-id="{{YOUR_LIST_ID}}">
	<input style="padding:10px 20px;" class="form-control" type="email" name="sub_email" />
	<button type="button" id="ssrm-main-subscribe"><?php echo $button_text; ?></button>
	<div style="display:none;grid-column:1/span2;color:#BD3F2C;" class="acelle-error"><?php echo $error; ?></div>
	<div style="display:none;grid-column:1/span2;color:#BD3F2C;" class="acelle-email-exists"><?php echo $email_exists_msg; ?></div>
	<div style="display:none;grid-column:1/span2;color:#317909;" class="acelle-welcome"><h2><?php echo $welcome_msg; ?></h2></div>
</div>