php下实现文件下载实现代码

文章介绍了利用php来实现读取文件并且下载的代码，php要下载文件必须用到header函数，大家可参考一下。

代码如下

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$file = 'monkey.gif'; if (file_exists($file)) { header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename='.basename($file)); header('Content-Transfer-Encoding: binary'); header('Expires: 0'); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Pragma: public'); header('Content-Length: ' . filesize($file)); ob_clean(); flush(); readfile($file); exit; } ?>

以上代码是下载代码

接下来贴一段在线预览pdf文件的代码

代码如下

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public function fddAction() { // get attachment location $attachment_location = $_SERVER["DOCUMENT_ROOT"] . "/pdf/fdd/sample.pdf"; if (file_exists($attachment_location)) { // attachment exists // send open pdf dialog to user header('Cache-Control: public'); // needed for i.e. header('Content-Type: application/pdf'); header('Content-Disposition: inline; filename="sample.pdf"'); readfile($attachment_location); die(); // stop execution of further script because we are only outputting the pdf } else { die('Error: File not found.'); } } ?>

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