php通过邮箱找回密码

很久没有写过博客了,现在我要重新开始记录,工作中遇到的一些问题,并将其记录下来最为经验的积累.

--------------------回归正题-----------------------

很多网站,只要有用户注册,就必然会遇到用户登陆时忘记密码的情况,常用的找回密码的方式有两种,一种是通过发送短信验证码,另一种是通过发送连接到邮箱,打开连接通过验证后跳转到重置密码界面.

短信认证的方法,之前写过一篇jsp版本的.通过短信找回密码. 思路十分简单,通过随机生成6位字符验证码,然后将其写入数据库,通过调用第三方短信接口将验证码发送到用户.用户验证成功后即可重置密码.

邮箱找回密码方式也十分简单:

邮箱验证格式:http://ip/find_pass.php?t=md5(username)+md5(password)+6位随机字符

发送邮件接口smtp.class.php如下:

<?php
class Smtp{
    /* Public Variables */
	var $smtp_port;
	var $time_out;
	var $host_name;
	var $log_file;
	var $relay_host;
	var $debug;
	var $auth;
	var $user;
	var $pass;

	/* Private Variables */
	var $sock;
	/* Constractor */
	function smtp($relay_host = "", $smtp_port = 25, $auth = false, $user, $pass) {
		$this->debug = false;
		$this->smtp_port = $smtp_port;
		$this->relay_host = $relay_host;
		$this->time_out = 30; //is used in fsockopen()
		$this->auth = $auth; //auth
		$this->user = $user;
		$this->pass = $pass;
		$this->host_name = "localhost"; //is used in HELO command
		$this->log_file = "";
		$this->sock = false;
	}

	/* Main Function */
	function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "") {
		$mail_from = $this->get_address($this->strip_comment($from));
		$body = ereg_replace("(^|(\r\n))(\.)", "\1.\3", $body);
		$header .= "MIME-Version:1.0\r\n";
		if ($mailtype == "HTML") {
			$header .= "Content-Type:text/html\r\n";
		}
		$header .= "To: " . $to . "\r\n";
		if ($cc != "") {
			$header .= "Cc: " . $cc . "\r\n";
		}
		$header .= "From: $from<" . $from . ">\r\n";
		$header .= "Subject: " . $subject . "\r\n";
		$header .= $additional_headers;
		$header .= "Date: " . date("r") . "\r\n";
		$header .= "X-Mailer:By Redhat (PHP/" . phpversion() . ")\r\n";
		list ($msec, $sec) = explode(" ", microtime());
		$header .= "Message-ID: <" . date("YmdHis", $sec) . "." . ($msec * 1000000) . "." . $mail_from . ">\r\n";
		$TO = explode(",", $this->strip_comment($to));
		if ($cc != "") {
			$TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
		}

		if ($bcc != "") {
			$TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
		}

		$sent = true;
		foreach ($TO as $rcpt_to) {
			$rcpt_to = $this->get_address($rcpt_to);
			if (!$this->smtp_sockopen($rcpt_to)) {
				$this->log_write("Error: Cannot send email to " . $rcpt_to . "\n");
				$sent = false;
				continue;
			}

			if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {
				$this->log_write("E-mail has been sent to <" . $rcpt_to . ">\n");
			} else {
				$this->log_write("Error: Cannot send email to <" . $rcpt_to . ">\n");
				$sent = false;
			}
			fclose($this->sock);
			$this->log_write("Disconnected from remote host\n");
		}
		return $sent;
	}

	/* Private Functions */

	function smtp_send($helo, $from, $to, $header, $body = "") {
		if (!$this->smtp_putcmd("HELO", $helo)) {
			return $this->smtp_error("sending HELO command");
		}
		// auth
		if ($this->auth) {
			if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {
				return $this->smtp_error("sending HELO command");
			}

			if (!$this->smtp_putcmd("", base64_encode($this->pass))) {
				return $this->smtp_error("sending HELO command");
			}
		}

		if (!$this->smtp_putcmd("MAIL", "FROM:<" . $from . ">")) {
			return $this->smtp_error("sending MAIL FROM command");
		}

		if (!$this->smtp_putcmd("RCPT", "TO:<" . $to . ">")) {
			return $this->smtp_error("sending RCPT TO command");
		}

		if (!$this->smtp_putcmd("DATA")) {
			return $this->smtp_error("sending DATA command");
		}

		if (!$this->smtp_message($header, $body)) {
			return $this->smtp_error("sending message");
		}

		if (!$this->smtp_eom()) {
			return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
		}

		if (!$this->smtp_putcmd("QUIT")) {
			return $this->smtp_error("sending QUIT command");
		}

		return true;
	}

	function smtp_sockopen($address) {
		if ($this->relay_host == "") {
			return $this->smtp_sockopen_mx($address);
		} else {
			return $this->smtp_sockopen_relay();
		}
	}

	function smtp_sockopen_relay() {
		$this->log_write("Trying to " . $this->relay_host . ":" . $this->smtp_port . "\n");
		$this->sock = @ fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
		if (!($this->sock && $this->smtp_ok())) {
			$this->log_write("Error: Cannot connenct to relay host " . $this->relay_host . "\n");
			$this->log_write("Error: " . $errstr . " (" . $errno . ")\n");
			return false;
		}

		$this->log_write("Connected to relay host " . $this->relay_host . "\n");
		return true;
		;
	}

	function smtp_sockopen_mx($address) {
		$domain = ereg_replace("^.+@([^@]+)$", "\1", $address);
		if (!@ getmxrr($domain, $MXHOSTS)) {
			$this->log_write("Error: Cannot resolve MX \"" . $domain . "\"\n");
			return false;
		}

		foreach ($MXHOSTS as $host) {
			$this->log_write("Trying to " . $host . ":" . $this->smtp_port . "\n");
			$this->sock = @ fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
			if (!($this->sock && $this->smtp_ok())) {
				$this->log_write("Warning: Cannot connect to mx host " . $host . "\n");
				$this->log_write("Error: " . $errstr . " (" . $errno . ")\n");
				continue;
			}

			$this->log_write("Connected to mx host " . $host . "\n");
			return true;
		}

		$this->log_write("Error: Cannot connect to any mx hosts (" . implode(", ", $MXHOSTS) . ")\n");
		return false;
	}

	function smtp_message($header, $body) {
		fputs($this->sock, $header . "\r\n" . $body);
		$this->smtp_debug("> " . str_replace("\r\n", "\n" . "> ", $header . "\n> " . $body . "\n> "));
		return true;
	}

	function smtp_eom() {
		fputs($this->sock, "\r\n.\r\n");
		$this->smtp_debug(". [EOM]\n");
		return $this->smtp_ok();
	}

	function smtp_ok() {
		$response = str_replace("\r\n", "", fgets($this->sock, 512));
		$this->smtp_debug($response . "\n");
		if (!ereg("^[23]", $response)) {
			fputs($this->sock, "QUIT\r\n");
			fgets($this->sock, 512);
			$this->log_write("Error: Remote host returned \"" . $response . "\"\n");
			return false;
		}

		return true;
	}

	function smtp_putcmd($cmd, $arg = "") {
		if ($arg != "") {
			if ($cmd == "")
				$cmd = $arg;

			else
				$cmd = $cmd . " " . $arg;
		}

		fputs($this->sock, $cmd . "\r\n");
		$this->smtp_debug("> " . $cmd . "\n");
		return $this->smtp_ok();
	}

	function smtp_error($string) {
		$this->log_write("Error: Error occurred while " . $string . ".\n");
		return false;
	}

	function log_write($message) {
		$this->smtp_debug($message);

		if ($this->log_file == "") {
			return true;
		}

		$message = date("M d H:i:s ") . get_current_user() . "[" . getmypid() . "]: " . $message;
		if (!@ file_exists($this->log_file) || !($fp = @ fopen($this->log_file, "a"))) {
			$this->smtp_debug("Warning: Cannot open log file \"" . $this->log_file . "\"\n");
			return false;
			;
		}

		flock($fp, LOCK_EX);
		fputs($fp, $message);
		fclose($fp);
		return true;
	}

	function strip_comment($address) {
		$comment = "\([^()]*\)";
		while (ereg($comment, $address)) {
			$address = ereg_replace($comment, "", $address);
		}
		return $address;
	}

	function get_address($address) {
		$address = ereg_replace("([ \t\r\n])+", "", $address);
		$address = ereg_replace("^.*<(.+)>.*$", "\1", $address);
		return $address;
	}

	function smtp_debug($message) {
		if ($this->debug) {
			echo $message . "
			;";
		}
	}
}
?>

http://ip/find_pass.php?t=md5(username)+md5(password)+6位随机字符

用户通过查询数据库中是否有token=md5(username)+md5(password)+6位随机字符判断是否可以重置密码,如果成功跳转到重置密码页面.
稍后给出源码下载地址.