How to set a different max_file_size other than that of the .ini for a single file uploader script

Question

假设我将max_file_size设置为max_file_size ，但是我只想在特定文件上将其限制为4mb，我将如何实现呢？

Answer 1

Try this.

$default_max_file_size = ini_get('upload_max_filesize');

if ($is_special_file) {
   ini_set('upload_max_filesize', '4M');

   // process your file

   // set it back to original value
   ini_set('upload_max_filesize', $default_max_file_size);
}