How to write PHP login function-PHP Tutorial-php.cn

This article mainly introduces how to write the PHP login function. Interested friends can refer to it. I hope it will be helpful to everyone.

The specific code is as follows:

1 login.php
In the login interface, the javascript script uses ajax to asynchronously request dologin.php, which is responsible for user information. Verification (including verification code, PHP generates verification code and can search by yourself). The code of the login interface is as follows:

Ajax PHP Demo System

Author:wangming

DateTime:2009-9-1

Version:1.0.0

Email:wangmingemail@163.com

姓名:wangming
电商06-2

Copy after login

2 ajaxhelper.js

function createRequest() { try { request = new XMLHttpRequest(); } catch (tryMS) { try { request = new ActiveXObject("Msxml2.XMLHTTP"); } catch (otherMS) { try { request = new ActiveXObject("Microsoft.XMLHTTP"); } catch (failed) { request = null; } } } return request; } function getActivatedObject(e) { var obj; if (!e) { // early version of IE obj = window.event.srcElement; } else if (e.srcElement) { // IE 7 or later obj = e.srcElement; } else { // DOM Level 2 browser obj = e.target; } return obj; } function addEventHandler(obj, eventName, handler) { if (document.attachEvent) { obj.attachEvent("on" + eventName, handler); } else if (document.addEventListener) { obj.addEventListener(eventName, handler, false); } }

Copy after login

3 dologin .php

Copy after login

4 conn.php

Copy after login

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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