[英]Force file download in php
我已經構建了一個簡單的文件管理器,用戶可以下載任何類型的文件,如pdf,word或gif文件。 我希望他們所有人都下載文件,而不是在瀏覽器中查看它。 上傳的文件名存儲在數據庫中。
<?php
// We'll be outputting a PDF
header('Content-type: application/pdf');
// It will be called downloaded.pdf
header('Content-Disposition: attachment; filename="downloaded.pdf"');
// The PDF source is in original.pdf
readfile('original.pdf');
?>
通常在發送文件之前將Content-Disposition
設置為attachment
,強制瀏覽器下載。
您需要配置Web服務器以為文件提供此標頭,或者通過PHP自己發送它們,然后發送特定標頭,如下所示:
header('Content-Disposition: attachment; filename=your_file_name.pdf');
請注意第一個解決方案更好,因為您不會因為腳本運行時間過長而導致下載風險被削減(您也可以更改它)。
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT\n");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Content-type: application/pdf;\n");
$len = filesize($filename);
header("Content-Length: $len;\n");
header("Content-Disposition: attachment; filename=\"downfile.pdf\";\n\n");
echo readfile($filename)
源代碼取自TCPDF庫
// download PDF as file
if (ob_get_contents()) {
$this->Error('Some data has already been output, can\'t send PDF file');
}
header('Content-Description: File Transfer');
if (headers_sent()) {
$this->Error('Some data has already been output to browser, can\'t send PDF file');
}
header('Cache-Control: public, must-revalidate, max-age=0'); // HTTP/1.1
header('Pragma: public');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
// force download dialog
if (strpos(php_sapi_name(), 'cgi') === false) {
header('Content-Type: application/force-download');
header('Content-Type: application/octet-stream', false);
header('Content-Type: application/download', false);
header('Content-Type: application/pdf', false);
} else {
header('Content-Type: application/pdf');
}
// use the Content-Disposition header to supply a recommended filename
header('Content-Disposition: attachment; filename="'.basename($name).'";');
header('Content-Transfer-Encoding: binary');
$this->sendOutputData($this->getBuffer(), $this->bufferlen);
break;
無論如何最重要的部分是
header('Content-Disposition: attachment; filename="'.basename($name).'";');
並注意到最后;
在字符串內部,沒有它,它將無法正常工作
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