php登录验证+MD5

测试网站：http://www.aqfun.cn/my_test/testphp/login.html

1.js:添加验证码一种方法

var code;
function createCode() {code = "";var codeLength = 4; //验证码的长度var checkCode = document.getElementById("checkCode");var codeChars = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9,'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'); //所有候选组成验证码的字符，当然也可以用中文的for (var i = 0; i < codeLength; i++){var charNum = Math.floor(Math.random() * 52);code += codeChars[charNum];}if (checkCode){checkCode.className = "code";checkCode.innerHTML = code;}
}
function validateCode() {var oinputCode = document.getElementById("vCode")var ouser= document.getElementById("name")var opass= document.getElementById("password")if (ouser.value==''){alert("请输入用户！");ouser.focus();return false;} else if(opass.value==''){alert("请输入密码");opass.focus();return false;} else if (oinputCode.value == '') {alert("请输入验证码！");oinputCode.focus();return false;} else if (oinputCode.value.toLowerCase() != code.toLowerCase()) {alert("输入验证码有误");createCode();oinputCode.value="";oinputCode.focus();return false;}else{oinputCode.value="";return true;}}

login.html:简单的一个布局

  

<


  


登录
  
name:
  
password:
  
passcode:


  
  
  

 home.php:登录成功后的主页