php下载文件的代码示例

<?php
$file = &#39;monkey.gif&#39;;

if (file_exists($file)) {
header(&#39;Content-Description: File Transfer&#39;);
header(&#39;Content-Type: application/octet-stream&#39;);
header(&#39;Content-Disposition: attachment; filename=&#39;.basename($file));
header(&#39;Content-Transfer-Encoding: binary&#39;);
header(&#39;Expires: 0&#39;);
header(&#39;Cache-Control: must-revalidate, post-check=0, pre-check=0&#39;);
header(&#39;Pragma: public&#39;);
header(&#39;Content-Length: &#39; . 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

<?php
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(&#39;Cache-Control: public&#39;); // needed for i.e.
header(&#39;Content-Type: application/pdf&#39;);
header(&#39;Content-Disposition: inline; filename="sample.pdf"&#39;);
readfile($attachment_location);
die(); // stop execution of further script because we are only outputting the pdf

} else {
die(&#39;Error: File not found.&#39;);
}
}
?>

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