PHP code example of isszz / svg-captcha
1. Go to this page and download the library: Download isszz/svg-captcha library . Choose the download type require .
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
isszz / svg-captcha example snippets
// SVG 验证码配置
return [
'width' => 150,
'height' => 50,
'noise' => 5, // 干扰线条的数量
'inverse' => false, // 反转颜色
'color' => true, // 文字是否随机色
'background' => '#fefefe', // 验证码背景色
'size' => 4, // 验证码字数
'ignoreChars' => '', // 验证码字符中排除
'fontSize' => 52, // 字体大小
'charPreset' => 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789', // 预设随机字符
'math' => '', // 计算类型, 如果设置不是+或-则随机两种
'mathMin' => 1, // 用于计算的最小值
'mathMax' => 9, // 用于计算的最大值
'salt' => '^%$YU$%%^U#$5', // 用于加密验证码的盐
'fontName' => 'Comismsh.ttf', // 用于验证码的字体, 建议字体文件不超过3MB
];
declare (strict_types = 1);
namespace app\index\controller;
use think\Response;
use think\Request;
class Captcha
{
/**
* 获取验证码, 用于api
*/
public function index(Request $request)
{
$config = $this->BuildParam($request->param());
return json([
'code' => 0,
'data' => svg_captcha($config),
'msg' => 'success',
]);
}
/**
* 直接显示svg验证码
*/
public function svg(Request $request)
{
$config = $this->BuildParam($request->param());
$content = svg_captcha($config);
return response($content, 200, ['Content-Length' => strlen($content)])->contentType('image/svg+xml');
}
/**
* 验证输入验证码是否正确
*/
public function check($code)
{
if(svg_captcha_check($code) === true) {
return json([
'code' => 0,
'data' => null,
'msg' => 'success',
]);
}
return json([
'code' => 1,
'data' => null,
'msg' => 'error',
]);
}
/**
* 根据传入参数组装配置
*
* /captcha/svg/w/200/h/60/s/72/l/5
*/
public function BuildParam($params = [])
{
$config = [];
if(empty($params)) {
return [];
}
// 模式,1=加法 2=减法, 或者随机两种
if(!empty($params['m'])) {
if($params['m'] == 1) {
$config['math'] = '+';
} elseif($params['m'] == 2) {
$config['math'] = '-';
} else {
$config['math'] = 'rand';
}
}
if(!empty($params['w'])) {
$config['width'] = $params['w'];
}
if(!empty($params['h'])) {
$config['height'] = $params['h'];
}
// 文字大小
if(!empty($params['s'])) {
$config['fontSize'] = $params['s'];
}
// 显示文字数量, 非算数模式有效
if(!empty($params['l'])) {
$config['size'] = $params['l'];
}
// 干扰线条数量
if(!empty($params['n'])) {
$config['noise'] = $params['n'];
}
// 背景色, #fefefe
if(!empty($params['b'])) {
$config['background'] = $params['b'];
}
return $config;
}
}
Validate::maker(function ($validate) {
$validate->extend('svgcaptcha', function ($value) {
return svg_captcha_check($value);
}, ':attribute错误!');
});