php下载图片到本地

<?php
/**
 * @filename saveImage.php
 */function getImgName($url){ ???if (!preg_match(‘/\/([^\/]+\.[a-z]{3,4})(\?.*?)?$/i‘,$url, $matches)) ???{ ???????return null; ???} ???$image_name = strtolower($matches[1]); ???return $image_name;}function saveImage($url, $path){ ???global $debuger; ???$handle = curl_init ($url); ???/* 显示响应头信息 */ ???curl_setopt($handle, CURLOPT_HEADER, true); ???curl_setopt($handle, CURLOPT_RETURNTRANSFER, 1); ???$img = curl_exec ($handle); ???$file_size = curl_getinfo($handle, CURLINFO_SIZE_DOWNLOAD); ???$http_code = curl_getinfo($handle, CURLINFO_HTTP_CODE); ???curl_close ($handle); ???list ($header, $body) = explode("\r\n\r\n", $img, 2); ???wlog ("http code: $http_code"); ???if ($http_code == 301 || $http_code == 302) ???{ ???????wlog ("[$url]重定向..."); ???????$matches = array(); ???????if (!preg_match(‘/(Location:|URI:)(.*?)\n/‘, $header, $matches)) ???????{ ???????????wlog (‘解析头信息失败，结束。‘); ???????????return false; ???????} ???????$redirect_url = trim(array_pop($matches)); ???????$url_parsed = parse_url($redirect_url); ???????if (isset($url_parsed)) ???????{ ???????????wlog ("已获取重定向地址[$redirect_url]，\n正在跳转..."); ???????????return saveImage($redirect_url, $path); ???????} ???????else ???????{ ???????????wlog (‘获取重定向地址失败，结束。‘); ???????????return false; ???????} ???} ???elseif ($http_code == 200) ???{ ???????wlog (‘请求成功...‘); ???} ???else ???{ ???????wlog (‘无效的请求，结束。‘); ???????return false; ???} ???$image_name = getImgName($url); ???if ($image_name == null) ???{ ???????if (preg_match (‘/Content-Disposition:.*?filename="([^"]+)".*?\n/‘, $header, $matches) && !empty($matches[1])) ???????{ ???????????$image_name = $matches[1]; ???????} ???????else ???????{ ???????????wlog (‘无效的图片地址！‘); ???????????return false; ???????} ???} ???if (!file_exists ($path)) ???{ ???????wlog ("目录$path不存在，正在创建..."); ???????if (mkdir ($path)) ???????{ ???????????wlog (‘目录创建成功...‘); ???????} ???????else ???????{ ???????????wlog (‘目录创建失败，结束。‘); ???????????return false; ???????} ???} ???$file_path = rtrim ($path, ‘/‘) . ‘/‘ . $image_name; ???$fp = fopen ($file_path, ‘w‘); ???$length = fwrite ($fp, $body); ???fclose ($fp); ???if ($length) ???{ ???????wlog ("文件保存成功！\n大小: $length\n位置: $file_path"); ???} ???else ???{ ???????wlog (‘文件保存失败。‘); ???????return false; ???} ???return true;}function wlog ($msg, $file_path = ‘‘){ ???if (empty ($file_path)) ???{ ???????$file_path = ‘log/save_img.log‘; ???} ???if (!file_exists (dirname ($file_path))) ???{ ???????if (!mkdir (dirname ($file_path))) ???????{ ???????????die(‘can not create directory‘ . dirname ($file_path)); ???????} ???} ???$fp = @fopen ($file_path, ‘a‘); ???flock ($fp, LOCK_EX); ???fwrite ($fp, $msg . "\n"); ???flock ($fp, LOCK_UN); ???fclose ($fp);}

<?php
/**
 * @filename test.php
 */define(‘PATH‘, ‘download/‘);require(‘class_inc/downloadImg.php‘);$img_list = [‘png‘ => ‘http://www.freepngimg.com/download/facebook/1-2-facebook-download-png.png‘, ????????????‘gif‘ => ‘https://kanimg.9ku.com/Article/20170725/1500953725469381.gif‘, ????????????‘jpg & redirect‘ => ‘http://pic2116.ytqmx.com:82/2017/0725/37/4.jpg‘, ????????????‘jpeg‘ => ‘https://upload.wikimedia.org/wikipedia/commons/thumb/5/52/Soviet_BMP-1_IFV.JPEG/300px-Soviet_BMP-1_IFV.JPEG‘, ????????????‘gif‘ => ‘http://n.sinaimg.cn/sports/transform/20170906/W34l-fykpyua5747968.gif‘, ????????????‘jpg with params‘ => ‘http://img.freepik.com/free-icon/bmp-image-file-type-outlined-interface-symbol_318-72075.jpg?size=338&ext=jpg‘, ????????????‘webp‘ => ‘http://www.gstatic.com/webp/gallery/1.webp‘, ????????????‘bmp‘ => ‘http://samples.fileformat.info/format/bmp/sample/4cb74cda027a43f3b278c05c3770950f/MARBLES.BMP?AWSAccessKeyId=0V91BEFA7GM093MEVMG2&Signature=t18N8JiZUw0QOd%2FZcyK8oZAwUWk%3D&Expires=1505213123‘, ????????????‘bmp1‘ => ‘http://cfile8.uf.tistory.com/image/167475304C879B427393BA‘ ???????????];foreach ($img_list as $type => $url){ ???echo "download image $type:"; ???if (test($url, PATH)) ???{ ???????echo "done\n"; ???} ???else ???{ ???????echo "failed\n"; ???}}function test($url, $path){ ???saveImage($url, $path); ???$file_name = getImgName($url); ???$file_path = rtrim($path) . ‘/‘ . $file_name; ???if (file_exists($file_path)) ???{ ???????return true; ???} ???return false;}