1：HTML:
<input type="text" name="verify" required lay-verify="required" class="layui-input layui-input-inline" value="" class="input-val">
<canvas id="canvas" width="100" height="43" ></canvas>
<input type="hidden" name="show" value=""/>
2js验证:
<script src="{{ URL::asset('js/jquery.min.js') }}"></script>
$(function(){
var show_num = [];
draw(show_num);
$("input[name='show']").val(show_num);
$("#canvas").on('click',function(){
draw(show_num);
$("input[name='show']").val(show_num);
})
// $(".btn").on('click',function(){
//
// })
})
function draw(show_num) {
var canvas_width=$('#canvas').width();
var canvas_height=$('#canvas').height();
var canvas = document.getElementById("canvas");//获取到canvas的对象，演员
var context = canvas.getContext("2d");//获取到canvas画图的环境，演员表演的舞台
canvas.width = canvas_width;
canvas.height = canvas_height;
var sCode ="A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0";
var aCode = sCode.split(",");
var aLength = aCode.length;//获取到数组的长度
for (var i =0; i <=3; i++) {
var j = Math.floor(Math.random() * aLength);//获取到随机的索引值
var deg = Math.random() *30 * Math.PI /180;//产生0~30之间的随机弧度
var txt = aCode[j];//得到随机的一个内容
show_num[i] = txt.toLowerCase();
var x =10 + i *20;//文字在canvas上的x坐标
var y =20 + Math.random() *8;//文字在canvas上的y坐标
context.font ="bold 23px 微软雅黑";
context.translate(x, y);
context.rotate(deg);
context.fillStyle =randomColor();
context.fillText(txt, 0, 0);
context.rotate(-deg);
context.translate(-x, -y);
}
for (var i =0; i <=5; i++) {//验证码上显示线条
context.strokeStyle =randomColor();
context.beginPath();
context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height);
context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height);
context.stroke();
}
for (var i =0; i <=30; i++) {//验证码上显示小点
context.strokeStyle =randomColor();
context.beginPath();
var x = Math.random() * canvas_width;
var y = Math.random() * canvas_height;
context.moveTo(x, y);
context.lineTo(x +1, y +1);
context.stroke();
}
}
function randomColor() {//得到随机的颜色值
var r = Math.floor(Math.random() *256);
var g = Math.floor(Math.random() *256);
var b = Math.floor(Math.random() *256);
return "rgb(" + r +"," + g +"," + b +")";
}
3：js提交
function login() {
var val=$("input[name='verify']").val().toLowerCase();
var show=$("input[name='show']").val();
var num=show.replace(/,/g, "");//去除所有逗号
if(val==''){
layer.msg('请输入验证码！');
return false;
}else if(val != num){
layer.msg('验证码错误！请重新输入！');
return false;
}
var user=$("input[name='user']").val();
var tpwd=$("input[name='tpwd']").val();
var token=$("input[name='_token']").val();
var url="/admin_login";
$.ajax({
url:url,
dataType:'json',
type:'post',
data: {'user':user,'tpwd':tpwd,"_token":token},
async:false,
success:function (info) {
if (info.code ===1) {
setTimeout(function () {
location.href ="/third_apply_list";
}, 1000);
}
layer.msg(info.msg);
},error:function (e) {
//console.log(e.status)
}
});
}
// })
