laravel使用ajax登录，和自定义生成验证码
使用larave框架操作ajax发送get请求，和自义定验证码
1. 后端登录代码
input('admin_name'));
$admin_password = trim($request->input('admin_password'));
$code = trim($request->input('code'));
$captchaCode = $request->session()->get('fzUserAdminCaptcha');
if ($code != $captchaCode) {
return response()->json(['msg' => '验证码错误', 'code' => 400]);
}
$admin = Admin::where('admin_name', $admin_name)->first();
if (!$admin) {
return response()->json(['msg' => '账号不存在', 'code' => 400]);
}
if ($admin->admin_gid != 25) {
return response()->json(['msg' => '此账号暂无权限', 'code' => 400]);
}
if (md5($admin_password) != $admin->admin_password) {
return response()->json(['msg' => '密码错误', 'code' => 400]);
}
$array = array();
$array['admin_name'] = $admin->admin_name;
$array['admin_id'] = $admin->admin_id;
$array['admin_login_time'] = time();
$array['admin_gid'] = $admin->admin_gid;
$request->session()->put('fzUserAdminInfo', $array);
Admin::where('admin_id', $admin->admin_id)->update(
[
'admin_login_time' => time(),
'admin_login_num' => $admin->admin_login_num + 1,
]);
$request->session()->forget('fzUserAdminCaptcha');
return response()->json(['msg' => '登录成功', 'code' => 200]);
}
/**
* 图像验证码
*/
public function captcha(Request $request)
{
session_start();
header("Content-type: image/png");
$width = 100; //宽度
$height = 40; //高度
$length = 4; //位数
$code = '';
for ($i = 0; $i < $length; $i++) {
$code .= rand(0, 9);
}
//存验证码
$request->session()->put('fzUserAdminCaptcha', $code);
$image = imagecreatetruecolor($width, $height);
$bgColor = imagecolorallocate($image, 255, 255, 255);
imagefill($image, 0, 0, $bgColor);
//打印验证码
$font = 12;
for ($i = 0; $i < $length; $i++) {
$x = $width / ($length + 1) * ($i + 1) + rand(-5, 5);
$y = $height / 2 - $font + rand(-5, 5);
$color = imagecolorallocate($image, rand(0, 120), rand(0, 120), rand(0, 120));
imagestring($image, $font, $x, $y, $code[$i], $color);
}
//随机线条干扰8
for ($i = 0; $i < 8; $i++) {
$x1 = rand(0, $width);
$y1 = rand(0, $height);
$w2 = rand(0, $width);
$h2 = rand(0, $height);
$color = imagecolorallocate($image, rand(0, 120), rand(0, 120), rand(0, 120));
imageline($image, $x1, $y1, $w2, $h2, $color);
}
//随机噪点80
for ($i = 0; $i < 80; $i++) {
$x = rand(0, $width);
$y = rand(0, $height);
$color = imagecolorallocate($image, rand(0, 120), rand(0, 120), rand(0, 120));
imagesetpixel($image, $x, $y, $color);
}
//输出图片并销毁内存
imagepng($image);
imagedestroy($image);
}
/**
* 退出登录
*/
public function logout(Request $request)
{
$request->session()->forget('fzUserAdminInfo');
return response()->json(['msg' => '退出登陆成功', 'code' => 200]);
}
}
2. 前端界面
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