_{^{";
// $str = htmlspecialchars_decode($str);
$str = preg_replace('/alt=[\\\'|\\"](.*?)[\\\'|\\"]/', '', $str);
return $str;
// return strip_tags($str, $allow_tags);
}

// 下载远程图片
function downloadImg($content, $school_id)
{
$img_date = date('Ymd');
$school_id = empty($school_id) ? 1 : $school_id;

// 如果解析返回的图片是已上传ucloud则无需处理
if ($this->flag == 1) {
return $content;
}

// 匹配所有远程图片
$img_array = array();
preg_match_all("//is", $content, $img_array);
if (empty($img_array[1])) {
return $content;
}

// 文件保存目录URL
$save_url = '/uploadfiles/wordimg/' . $school_id . '/' . date('Y') . '/' . date('m') . '/' . date('d');
$save_path = dirname(dirname(dirname(__FILE__))) . $save_url;

// 创建文件夹
if (!is_dir($save_path)) {
@mkdir($save_path, 0777, true);
}

foreach ($img_array[1] as $key => $value) {

// 保存到本地图片名称
$imgInfo = pathinfo($value);
$imgname = uniqid() . '.' . $imgInfo['extension'];

// 保存到本地的实际文件地址（包含路径和名称）
$fileName = $save_path . '/' . $imgname;
self::curlDownloadImage($value, $fileName);

// 教师端访问的地址
$fileurl = $this->webSiteUrl . $save_url . "/" . $imgname;

// 判断图片是否要压缩
self::imgCompress($fileName);

// 替换原来的图片地址
$uploadInfo = $this->ucloud->putFile('teacher'.$save_url .'/'. $imgname, $fileName);
if ($uploadInfo['status']) {
$content = str_replace($value, $uploadInfo['url'], $content);
@unlink($fileName);
} else {
$content = str_replace($value, $fileurl, $content);
}
}
return $content;
}

/**
* 采集远程图片
* @param string $url 远程文件地址
* @param string $fileName 保存后的文件名
* @return bool
*/
function curlDownloadImage($url, $fileName = '')
{
if (empty($url) || empty($fileName)) {
return false;
}

// 获取远程文件资源
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 2);
$tempFile = curl_exec($ch);
curl_close($ch);

// 保存文件
$fp = @fopen($fileName, "w");
fwrite($fp, $tempFile);
fclose($fp);
return true;
}

// 压缩图片尺寸以及比例
public static function imgCompress($imgSrc = '')
{
$standardWidth = 2000;
if (empty($imgSrc)) {
return true;
} elseif (!file_exists($imgSrc)) {
return true;
}

list($width, $height, $type) = getimagesize($imgSrc);
if ($width < $standardWidth) {
return true;
}

$multiple = round($width / $standardWidth, 2);
$newWidth = 2000;
$newHeight = ceil($height / $multiple);

if (!$newWidth || !$newHeight) return true;

$imgType = image_type_to_extension($type, false);
$imageCreateType = 'image' . $imgType; // 创建新图像
$funCreateFromType = 'imagecreatefrom' . $imgType; // 创建新图像

$imageP = imagecreatetruecolor($newWidth, $newHeight);
$colorBlack = imagecolorallocatealpha($imageP, 0, 0, 0, 127);//拾取一个完全透明的颜色
imagealphablending($imageP, false);//关闭混合模式，以便透明颜色能覆盖原画布
imagefill($imageP, 0, 0, $colorBlack);//填充
$image = $funCreateFromType($imgSrc);

imagecopyresampled($imageP, $image, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
imagesavealpha($imageP, true);
$imageCreateType($imageP, $imgSrc);
imagedestroy($image);
imagedestroy($imageP);
return true;
}

// 下载错题word文本
function downloadWord($word_info, $word_url, $school_id)
{
//暂时修改
return "";
if (empty($word_info) || empty($word_url) || empty($school_id)) return '';
// 文件保存目录URL
$save_url = '/uploadfiles/words/wrong_word/' . $school_id . '/' . date('Y') . '/' . date('m') . '/' . date('d');
$save_path = dirname(dirname(dirname(__FILE__))) . $save_url;

// 创建文件夹
if (!is_dir($save_path)) {
@mkdir($save_path, 0777, true);
}

// 保存到本地word名称
$wordInfo = pathinfo($word_info['word_name']);
$wordname = $word_info['word_id'] . '.' . $wordInfo['extension'];

// 保存到本地的实际文件地址（包含路径和名称）
$fileName = $save_path . '/' . $wordname;

// 实际访问的地址
$fileurl = Yii::app()->params['siteurl'] . $save_url . "/" . $wordname;

// 读取远程图片
set_time_limit(0);
$get_file = @file_get_contents($word_url);

if ($get_file) {
$fp = @fopen($fileName, "w");
@fwrite($fp, $get_file);
@fclose($fp);

return $fileurl;
}
return '';
}

// 公式转换（2018-11-29停用）
function formulaTransform($string)
{
preg_match_all("/(data-latex=\\\"([^\"]*\\\"))|(\\$.*?\\$)|(\\\\\\[.*?\\\\\\])/", $string, $get_math_thr);
if ($get_math_thr[0]) {
$uniqueMath = array_unique($get_math_thr[0]);
foreach ($uniqueMath as $vvtr) {
if (substr($vvtr, 0, 10) !== "data-latex") {
$mathmlOptThr = saveMathtex($vvtr);
if ($mathmlOptThr['status'] == 1) {
$string = str_replace($vvtr, '', $string);
}
}
}
}

// LaTeX与MathML转换(暂时注销 2016-10-08)
//$myMathml = new MathMlEncode();
//$string = $myMathml->replaceForJsMathml($string);
return $string;
}

private static function getApiData($apiParam, $flag = 1, $data, $timeOut = 0,$extraHeaders = array())
{
$result = FALSE;
$ch = @curl_init();
if ($ch) {
$headers = array(
'Content-Type: application/json',
'Content-Length: ' . strlen($data),
);
if($extraHeaders){
$headers = array_merge($headers,$extraHeaders);
}
// Digest认证
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($ch, CURLOPT_USERPWD, $apiParam['username'] . ':' . $apiParam['password']);

// 不输出头部
curl_setopt($ch, CURLOPT_HEADER, 0);
if ($timeOut) {
curl_setopt($ch, CURLOPT_TIMEOUT, $timeOut);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 3);
}
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

// curl_exec 获取到的内容不直接输出, 而是返回
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

// 请求重启路由器的地址传参进行重启
curl_setopt($ch, CURLOPT_URL, $apiParam['prefix']);

curl_setopt($ch, CURLOPT_USERAGENT, 'Api Client/1.0.0 (chengfei@liancaitech.com)');
if ($flag == 2) {
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
}

$result = curl_exec($ch);
if (curl_errno($ch)) {
return 'curl_errno:' . curl_errno($ch);
}

// 释放资源
curl_close($ch);
}
return $result;
}

//全学科试题调用java检索缓存接口
public function searchTopics($topicIds = array(),$schoolId = 0){
$apiParam = Yii::app()->params['api'][3];
if($apiParam && $topicIds && $schoolId){
$url = $apiParam['prefix'].'cgi/teacher/schtk/qxk/school-topic-flush/'.$schoolId;
self::getApiData(array(
'username' => $apiParam['username'],
'password' => $apiParam['password'],
'prefix' => $url
), 2, json_encode($topicIds), 3,array('X-Basic-V:2'));
}
}
}}}