What to do if php cannot download large files

Solution to the problem that php cannot download large files: first find and open the "php.ini" file; then set "memory_limit" to 1024M; then output the data to the client browser.

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Solve the problem of being unable to download large files using PHP

In actual applications, there will be a size limit when using PHP's fread() function to read server files. When the server file size exceeds a certain amount (128M?), the client browser cannot download the file. Is it because of the memory_limit limit in the configuration file php.ini?

After setting the memory_limit to 1024M, I tested a 180M file and found that the problem remained. Code:

header('content-type:application/octet-stream');
            header('accept-ranges: bytes');
            header('content-length: '.filesize($filePath));
            header('content-disposition:attachment;filename='.$fileName);
            $fp = fopen($filePath, "r");
            echo fread($fp, filesize($filePath));
            fclose($fp);

The above reading method is to output the data to the client browser at one time. Does it have anything to do with this? Try reading from the file line by line:

header('content-type:application/octet-stream');
            header('accept-ranges: bytes');
            header('content-length: '.filesize($filePath));
            header('content-disposition:attachment;filename='.$fileName);
            $fp = fopen($filePath, "r");
            while(!feof($fp)) {
                echo fgets($fp, 4096);
            }
           fclose($fp);

Aha! No problem anymore.

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