Strange problem while uploading large files
I am having a strange problem while uploading large files in PHP.
In php.ini, max_execution_time is set to 30, post_max_size is set to 32M, upload_max_filesize is set to 32M. When I tried to upload a file of size 40.2 MB, it don't show any error. The $_FILES variable has the value array(0) { } and $_FILES['userfile'] shows NULL.
If the file size is more than the value set in php.ini, then it should return the error message
UPLOAD_ERR_INI_SIZE, Value: 1; The uploaded file exceeds the upload_max_filesize directive in php.ini.
But it's not showing any error either (as $_FILES is an empty array). I am clueless why this is happening.
When I change in php.ini and set post_max_size is set to 64M, upload_max_filesize is set to 64M, then it works fine. So, I decided to use the following code, instead of changing php.ini file.
ini_set('upload_max_filesize', '64M');
ini_set('post_max_size', '64M');
ini_set('max_execution_time', 300);
I even tried to increase max_execution_time. Still, I am having the same problem. ini_set() is not working here.
Answer
To have the 40 MB file fail with upload error, you have to increase the post_max_size, if you exceed the value of that variable, you get an empty $_FILES array. See the manual
If the size of post data is greater than post_max_size, the $_POST and $_FILES superglobals are empty.
Also, ini_set() is not working there because two of the variables you are trying to change are PHP_INI_PERDIR and thus need to be changed in php.ini or in .htaccess or httpd.conf. You should try the 40MB file with, for example, these settings in .htaccess
php_value upload_max_filesize 32M
php_value post_max_size 64M
php_value max_execution_time 300