mail.php

<?php
include 'core/init.php';
protect_page();
admin_protect();
include 'includes/overall/header.php';
?>

<h1>Email all users</h1>

<?php
if (isset($_GET['success']) === true && empty($_GET['success']) === true) {
?>
	<p>Email has been sent</p>
<?php
} else {
	if (empty($_POST) === false) {
		if (empty($_POST['subject']) === true) {
			$errors[] = 'Subject is required';
		}
		
		if (empty($_POST['body']) === true) {
			$errors[] = 'Body is required';
		}
		
		if (empty($errors) === false) {
			echo output_errors($errors);
		} else {
			mail_users($_POST['subject'], $_POST['body']);
			echo "<script>window.top.location='mail.php?success'</script>";
			header('Location: mail.php?success');
			exit();
		}
	}
	?>

	<form action="" method="post">
		<ul>
			<li>
				Subject*:<br>
				<input type="text" name="subject">
			</li>
			<li>
				Body*:<br>
				<textarea name="body"></textarea>
			</li>
			<li>
				<input type="submit" value="Send">
			</li>
		</ul>
	</form>

<?php
}
include 'includes/overall/footer.php';
?>