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:

<?php
$file = 'monkey.gif';
if (file_exists($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:

<?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('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.');
    }
}
?>

教程链接:http://www.phprm.com/scxz/fs1041.html

随意转载~但请保留教程地址★