php高级面试题的要点

function download_images($article_url = '', $image_path = 'tmp'){

    // 获取文章类容

    $content = file_get_contents($article_url);

    // 利用正则表达式得到图片链接

    $reg_tag = '/<img.*?\"([^\"]*(jpg|bmp|jpeg|gif|png)).*?>/';

    $ret = preg_match_all($reg_tag, $content, $match_result);

    $pic_url_array = array_unique($match_result1[1]);

    // 创建路径

    $dir = getcwd() . DIRECTORY_SEPARATOR .$image_path;

    mkdir(iconv("UTF-8", "GBK", $dir), 0777, true);

    foreach($pic_url_array as $pic_url){

        // 获取文件信息

        $ch = curl_init($pic_url);

        curl_setopt($ch, CURLOPT_HEADER, 0);

        curl_setopt($ch, CURLOPT_NOBODY, 0);

        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE );

        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE );

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

        $fileInfo = curl_exec($ch);

        $httpinfo = curl_getinfo($ch);

        curl_close($ch);

        // 获取图片文件后缀

        $ext = strrchr($pic_url, '.');

        $filename = $dir . '/' . uniqid() . $ext;

        // 保存图片信息到文件

        $local_file = fopen($filename, 'w');

        if(false !== $local_file){

            if( false !== fwrite($local_file, $filecontent) ){

            fclose($local_file);

            }

        }

    }

}