Example of how PHP uses the readfile() function to set the file size

This article explains how to use the readfile() function in PHP to set the file size through example code. Friends who need it can refer to it

Use the compressed package generated by PHP ZipArchive. Small compressed packages are It can be downloaded, but today I encountered a 404 error when it was over 150M. The first thing that came to mind was that the file size exceeded the default setting of PHP. There are two ways to modify it:

php.ini: memory_limit

memory_limit sets the memory limit. If you use readfile() to read files, it will be related to this. Just modify this value and save it, then restart php-fpm.

memory_limit = 128M

Finally remember: service php-fpm restart

ini_set

PHP ini_set is used to set php. The value of ini takes effect when the function is executed, so we can directly use it to modify the memory execution size. If some friends use virtual space, this function is a savior.

ini_set('memory_limit', '512M');

Full example:

set_time_limit(0);
ini_set('memory_limit', '512M');
header("Cache-Control: public");
header("Content-Description: File Transfer");
header('Content-disposition: attachment; filename=' . basename($zipfile));
header("Content-Type: application/zip");
header("Content-Transfer-Encoding: binary");
header('Content-Length: ' . filesize($zipfile));
ob_clean();
flush();
@readfile($zipfile);
unlink($zipfile);

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