PHP批量下载指定路径图片实例
知道服务器上图片所保存的路径,如何批量下载到本地,其中850文件夹及014文件名都从000开始匹配,文件存在就下载,否则略过。
以下代码只能下载指定页面的:(望大神指教,谢过!)
<?php $url = "http://site.com/"; $content=file_get_contents($url); $reg="//"; preg_match_all($reg,$content,$matches);
以下代码只能下载指定页面的:(,望大神指教,谢过!
<?php $url = "http://site.com/"; $content=file_get_contents($url); $reg="//"; preg_match_all($reg,$content,$matches); $path = './imgDownload'; if(!file_exists($path)){ mkdir($path, 0777); } for($i = 0;$i < count($matches[1]);$i ++){ /*explode $url_arr[$i] = explode('/', $matches[1][$i]); $last = count($url_arr[$i])-1; */ //strrchr $filename = strrchr($matches[1][$i], '/'); downImage($matches[1][$i],$path.$filename); //downImage($matches[1][$i],$path.'/'.$url_arr[$i][$last]); } function downImage($url,$filename="") { if($url=="") return false; if($filename=="") { $ext=strrchr($url,"."); if($ext!=".gif" && $ext!=".jpg" && $ext!=".png" && $ext!="jpeg") return false; $filename=date("YmdHis").$ext; } ob_start(); //make file that output from url goes to buffer readfile($url); //file_get_contents($url); 这个方法不行的!!!只能用readfile $img = ob_get_contents(); ob_end_clean(); $fp=@fopen($filename, "a");//append fwrite($fp,$img); fclose($fp); return $filename; }
可以使用 curl_multi_*
系列函数批量请求远程地址。 把所有需要请求的页面放到一个数组里,每次并发20个去请求。
建议修改下程序思路,先批量根据页面地址获取需要下载的图片地址,第二步再批量处理图片下载。
两个部分的都可以用 culr_multi_*
系列函数去并发处理。
代碼寫得太糟糕了,還有幾處錯誤,幫你重寫一份。
在一個循環里多次調用 addPage
就行了。
如果已經有 url 的話,也可以直接調用 download
。
for ($i = 0; $i < 99; ++$i) download('http://cdn.image.com/static/' . $i . '.png', DOWNLOAD_PATH . $i . '.png');
效率有點低,可以考慮改用 culr_multi_*
系列函數。
$referer) { // echo $url, "\n"; $filename = pathinfo($url, PATHINFO_FILENAME) . '.' . pathinfo($url, PATHINFO_EXTENSION); download($url, $path . $filename, $referer); } // error_reporting(1); } function addPage($page, &$urls) { $cur = extractPage($page); for ($i = 0, $n = count($cur); $i < $n; ++$i) { $j = $cur[$i]; if (!isset($urls[$j])) $urls[$j] = $page; } } function extractPage($page, $reg = '//') { $content = file_get_contents($page); // $content = ''; preg_match_all($reg, $content, $matches); return $matches[1]; } function download($url, $file, $referer = '') { $url = abs_url($url, $referer); echo $url, "\n"; $opts = [ 'http' => [ 'method' => 'GET', 'header' => "Accept-language: en\r\n" . // "Cookie: \r\n" . "Referer: " . $url . "\r\n" ] ]; $context = stream_context_create($opts); file_put_contents($file, file_get_contents($url, false, $context)); return $file; } function abs_url($url, $referer) { $com = parse_url($url); if (!isset($com['scheme'])) $com['scheme'] = 'http'; if ($referer !== '') { $ref = parse_url($referer); if (!isset($com['host'])) { if (isset($ref['host'])) { $com['host'] = $ref['host']; if (!isset($ref['path'])) $ref['path'] = '/'; } if (isset($com['path'][0])) { if ($com['path'][0] !== '/') $com['path'] = $ref['path'] . $com['path']; } else if (isset($ref['host'])) { $com['path'] = $ref['path']; } } else { if (!isset($com['path'])) $com['path'] = ''; } } return unparse_url($com); } function unparse_url($com) { return (isset($com['host']) ? ($com['scheme'] . '://' . $com['host']) : '') . $com['path'] . (isset($com['query']) ? '?'.$com['query'] : ''); }

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