php 从 Base64 字符串下载 PDF
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Download PDF from Base64 string
提问by Marijn Roukens.com
My situation (all in PHP):
我的情况（全部在 PHP 中）：
What I get: A Base64 encoded string from an API.
我得到的是：来自 API 的 Base64 编码字符串。
What I want: A link to click on that downloads this document as an PDF. (I am sure it will always be a PDF file)
我想要的是：点击链接可将本文档下载为 PDF。（我确定它永远是一个 PDF 文件）
I have tried this:
我试过这个：
$decoded = base64_decode($base64);
file_put_contents('invoice.pdf', $decoded);
but I am kind off lost, can't seem to find a way to download it after decoding it.
但我有点迷路了，解码后似乎找不到下载它的方法。
I hope someone can help me, thanks in advance!
我希望有人可以帮助我，在此先感谢！
回答by J. Titus
The example here seems helpful: http://php.net/manual/en/function.readfile.php
这里的例子似乎很有帮助：http: //php.net/manual/en/function.readfile.php
In your case:
在你的情况下：
<?php
$decoded = base64_decode($base64);
$file = 'invoice.pdf';
file_put_contents($file, $decoded);
if (file_exists($file)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);
exit;
}
?>
This should force the download to occur.
这应该会强制进行下载。
回答by Tomas Kuzminskas
Don't need to decode base64. You can send header with binary file.
不需要解码base64。您可以使用二进制文件发送标头。
header('Content-Description: File Transfer');
header('Content-Type: application/pdf');
header('Content-Disposition: attachment; filename='.$filename);
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . strlen($filedata));
ob_clean();
flush();
echo $filedata;
exit;
