PHP 邮件列表 - 没有数据库，只有flatfile - CSV格式

Posted 2021-05-14

<?php

/**
 * Mailing List Script
 * Copyright 2009 - www.pgmr.co.uk - [e-mail]
 */
 
function showForm() {
	echo '
	<form method="post" action="">
	Email Address: <input type="text" name="email"> <br />
	<input type="submit" value="Submit" name="submit">
	</form>
	';
}

if(empty($_POST['submit']) === false) {
	$email = htmlentities(strip_tags($_POST['email']));
	
	$logname = 'email.txt';
	$logcontents = file_get_contents($logname);
	
	if(strpos($logcontents,$email)) {
		die('You are already subscribed.');
	} else {
		$filecontents = $email.',';
		$fileopen = fopen($logname,'a+');
		$filewrite = fwrite($fileopen,$filecontents);
		$fileclose = fclose($fileopen);
		if(!$fileopen or !$filewrite or !$fileclose) {
			die('Error occured');
		} else {
			echo 'Your email has been added.';
		}
	}	
} else {
	showForm();
}

?>