php渲染大型zip文件-达到内存限制 [英] php rendering large zip file - memory limit reached

问题描述

我尝试在php中呈现一个zip文件. 代码:

I try to render a zip file in php. Code:

header('Content-Type: application/zip');
header('Content-Length: ' . filesize($file));
header('Content-Disposition: attachment; filename="file.zip"');

下载的文件只有几个字节.这是一条错误消息:

The downloaded file, is only few bytes. It is an error message:

<br /> <b>Fatal error</b>: Allowed memory size of 16777216 bytes exhausted (tried to allocate 41908867 bytes) in <b>/var/www/common_index/main.php</b> on line <b>217</b><br />

<br /> <b>Fatal error</b>: Allowed memory size of 16777216 bytes exhausted (tried to allocate 41908867 bytes) in <b>/var/www/common_index/main.php</b> on line <b>217</b><br />

我不希望增加php.ini中的memory_limit.有什么其他方法可以正确渲染大型zip文件而无需修改全局设置?

I do not wish to increase memory_limit in php.ini. What are alternative ways to properly render large zip files without tinkering with global settings?

推荐答案

流式传输下载内容，因此不会占用内存. 小例子:

Stream the download, so it doesn't choke on memory. Tiny example:

$handle = fopen("exampe.zip", "rb");
while (!feof($handle)) {
    echo fread($handle, 1024);
    flush();
}
fclose($handle);

添加正确的输出标题以进行下载，您应该解决该问题.

Add correct output headers for downloading, and you should solve the problem.

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