01.开启session
在server.php文件中添加如下:
session_start(); // 验证码使用
02.在resources中新建org/vrcode/Vcode.class.php,末尾附录验证码代码
03.在验证码文件LoginController.php中添加
namespace App\Http\Controllers\Admin;
use Illuminate\Http\Request;
require_once '../resources/org/vrcode/Vcode.class.php';
class LoginController extends CommonController
{
public function login(){
return view('admin.login');
}
// 验证码
public function code(){
$vcode = new \Vcode(120, 45, 4);
//参数(宽,高,验证码的数量)
//将验证码放到服务器自己的空间保存一份
session(['code' => $vcode->getcode()]); // 需要在开始文件中打开session
//将验证码图片输出
$vcode->outimg();
dump($vcode);
}
// 获取验证码
public function getcode(){
dump(session('code'));
}
}
04.路由中引入验证码路由
Route::group(['prefix'=>'admin','namespace'=>'Admin','middleware'=>'web'],function(){
Route::get('login','LoginController@login');
Route::get('code','LoginController@code'); // 验证码生成
Route::get('getcode','LoginController@getCode'); // 获取验证码
});
05.验证码前端显示
因为浏览器会保存code的session,所以为了让点击后能顺利地更换图片,需要在后面加上Math.random( )
附录:验证码类代码Vcode.class.php:
class Vcode {
private $width; //宽
private $height; //高
private $num; //数量
private $code; //验证码
private $img; //图像的资源
//构造方法, 三个参数
function __construct($width=80, $height=20, $num=4) {
$this->width = $width;
$this->height = $height;
$this->num = $num;
$this->code = $this->createcode(); //调用自己的方法
}
//获取字符的验证码, 用于保存在服务器中
function getcode() {
return $this->code;
}
//输出图像
function outimg() {
//创建背景 (颜色, 大小, 边框)
$this->createback();
//画字 (大小, 字体颜色)
$this->outstring();
//干扰元素(点, 线条)
$this->setdisturbcolor();
//输出图像
$this->printimg();
}
//创建背景
private function createback() {
//创建资源
$this->img = imagecreatetruecolor($this->width, $this->height);
//设置随机的背景颜色
$bgcolor = imagecolorallocate($this->img, rand(225, 255), rand(225, 255), rand(225, 255));
//设置背景填充
imagefill($this->img, 0, 0, $bgcolor);
//画边框
$bordercolor = imagecolorallocate($this->img, 0, 0, 0);
imagerectangle($this->img, 0, 0, $this->width-1, $this->height-1, $bordercolor);
}
//画字
private function outstring() {
for($i=0; $i<$this->num; $i++) {
$color= imagecolorallocate($this->img, rand(0, 128), rand(0, 128), rand(0, 128));
$fontsize=rand(8,15); //字体大小
$x = 3+($this->width/$this->num)*$i; //水平位置
$y = rand(0, imagefontheight($fontsize)-3);
//画出每个字符
imagechar($this->img, $fontsize, $x, $y, $this->code{$i}, $color);
}
}
//设置干扰元素
private function setdisturbcolor() {
//加上点数
for($i=0; $i<100; $i++) {
$color= imagecolorallocate($this->img, rand(0, 255), rand(0, 255), rand(0, 255));
imagesetpixel($this->img, rand(1, $this->width-2), rand(1, $this->height-2), $color);
}
//加线条
for($i=0; $i<10; $i++) {
$color= imagecolorallocate($this->img, rand(0, 255), rand(0, 128), rand(0, 255));
imagearc($this->img,rand(-10, $this->width+10), rand(-10, $this->height+10), rand(30, 300), rand(30, 300), 55,44, $color);
}
}
//输出图像
private function printimg() {
if (imagetypes() & IMG_GIF) {
header("Content-type: image/gif");
imagegif($this->img);
} elseif (function_exists("imagejpeg")) {
header("Content-type: image/jpeg");
imagegif($this->img);
} elseif (imagetypes() & IMG_PNG) {
header("Content-type: image/png");
imagegif($this->img);
} else {
die("No image support in this PHP server");
}
}
//生成验证码字符串
private function createcode() {
$codes = "3456789abcdefghijkmnpqrstuvwxyABCDEFGHIJKLMNPQRSTUVWXY";
$code = "";
for($i=0; $i < $this->num; $i++) {
$code .=$codes{rand(0, strlen($codes)-1)};
}
return $code;
}
//用于自动销毁图像资源
function __destruct() {
imagedestroy($this->img);
}
}