安装验证码扩展:composer require topthink/think-captcha
创建验证码接口:
public function setYzm(){
$captcha_img = Captcha_src();
$src = $_SERVER['REQUEST_SCHEME'].'://'.$_SERVER['SERVER_NAME'].'/api'.captcha_src();
ob_clean(); //清除缓冲区,防止出现“图像因其本身有错无法显示'的问题
$type = getimagesize($src)['mime']; //获取图片类型
header("Content-Type:{$type}");
$imgData = file_get_contents($src); //获取图片二进制流
$base64String = 'data:' . $type . ';base64,' . base64_encode($imgData);
return show(200,'请求成功',$base64String);
}
可以不用base64处理直接返回验证码地址
public function checkYzm($yzm){
if(!Captcha::checkApi($yzm)) throw new Exception('验证码验证失败~');
return true;
}
修改底层配置
路径:vendor/topthink/think-captcha/src/Captcha.php
/**
* 创建验证码
* @return array
* @throws Exception
*/
protected function generate(): array
{
$bag = '';
if ($this->math) {
$this->useZh = false;
$this->length = 5;
$x = random_int(10, 30);
$y = random_int(1, 9);
$bag = "{$x} + {$y} = ";
$key = $x + $y;
$key .= '';
} else {
if ($this->useZh) {
$characters = preg_split('/(?<!^)(?!$)/u', $this->zhSet);
} else {
$characters = str_split($this->codeSet);
}
for ($i = 0; $i < $this->length; $i++) {
$bag .= $characters[rand(0, count($characters) - 1)];
}
$key = mb_strtolower($bag, 'UTF-8');
}
$hash = password_hash($key, PASSWORD_BCRYPT, ['cost' => 10]);
$this->session->set('captcha', [
'key' => $hash,
]);
//加上这行代码,便于后续校验验证码
if(empty(cache($key))){
cache($key, $hash, 5*60);
}else{
return $this->generate();
}
//加上这行代码,便于后续校验验证码
return [
'value' => $bag,
'key' => $hash,
];
}
/**
* 验证验证码是否正确
* @access public
* @param string $code 用户验证码
* @return bool 用户验证码是否正确
*/
public function checkApi(string $code): bool
{
if (!cache($code)) {
return false;
}
$key = cache($code);
$code = mb_strtolower($code, 'UTF-8');
$res = password_verify($code, $key);
if ($res) {
cache($code,NULL);
}
return $res;
}
评论 (0)