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vendor/topthink/think-captcha/src/helper.php

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+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006-2015 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: yunwuxin <448901948@qq.com>
+// +----------------------------------------------------------------------
+
+\think\Route::get('captcha/[:id]', "\\think\\captcha\\CaptchaController@index");
+
+\think\Validate::extend('captcha', function ($value, $id = '') {
+    return captcha_check($value, $id);
+});
+
+\think\Validate::setTypeMsg('captcha', ':attribute错误!');
+
+
+/**
+ * @param string $id
+ * @param array  $config
+ * @return \think\Response
+ */
+function captcha($id = '', $config = [])
+{
+    $captcha = new \think\captcha\Captcha($config);
+    return $captcha->entry($id);
+}
+
+
+/**
+ * @param $id
+ * @return string
+ */
+function captcha_src($id = '')
+{
+    return \think\Url::build('/captcha' . ($id ? "/{$id}" : ''));
+}
+
+
+/**
+ * @param $id
+ * @return mixed
+ */
+function captcha_img($id = '')
+{
+    return '<img src="' . captcha_src($id) . '" alt="captcha" />';
+}
+
+
+/**
+ * @param string $id
+ * @param string $element 验证码HTML元素ID
+ * @return string
+ */
+function captcha_img_with_replacement($id = '', $element = 'think-captcha')
+{
+    return '<img src="' . captcha_src($id) . '" alt="captcha" id="' . $element . '" onclick="document.getElementById("'
+        . $element . '").src="' . captcha_src($id) . '"+Math.random()' . '/>';
+}
+
+
+/**
+ * @param        $value
+ * @param string $id
+ * @param array  $config
+ * @return bool
+ */
+function captcha_check($value, $id = '')
+{
+    $captcha = new \think\captcha\Captcha((array)\think\Config::get('captcha'));
+    return $captcha->check($value, $id);
+}