用PHP+Mysql+jQuery来实现一个密码找回的功能，一般步骤是：

1.表单输入注册时的邮箱；

2.验证用户邮箱是否正确，如果用户邮箱不存在网站的用户表中，则提示用户邮箱未注册；

3.发送邮件，如果用户邮箱确实存在用户表中，则组合用于验证用户信息的字符串，并构造URL发送到用户邮箱中

4.用户登录邮箱收取邮件，点击URL链接到网站验证程序；

5.网站程序通过用户请求的字符串查询本地用户表，比对用户信息是否正确；

6.如果正确则转到重置密码页面重新设置新密码，反之则提示用户验证无效。-With PHP+Mysql+jQuery to implement a password recovery function, the general steps are: a form to enter the mailbox when registering　2 to verify the user' s mailbox is correct, if the user' s mailbox does not exist in the user table site, then prompts the user mailbox is not registered　3 Send mail if the user' s mailbox does exist in the user table, is used to verify user information string combinations and construct a URL sent to the user' s mailbox　4 user logon mailbox to receive messages, click on the URL to the site verification procedures　5 sites to query string user requests through a local user table, than the user information is correct　6 If the correct password reset page go again set a new password, otherwise the user is prompted to verify invalid.