Upload file size is defined in the PHP settings. Default PHP configuration values are restricted to a maximum of 2 MB upload file size.
You can increase this limit in the php.ini file:
memory_limit = 128M
post_max_size = 12M
upload_max_filesize = 10M
Or in .htaccess file (if you’re using Apache and require per-directory settings):
php_value memory_limit 128M
php_value post_max_size 12M
php_value upload_max_filesize 10M
In above example we have increased file upload size from 2 MB to 10 MB. There are
also two additional directives - post_max_size and memory_limit. You will
have to increase post_max_size so that it is bigger than upload_max_size.
If the value of post_max_size is set larger than memory_limit, you will have
to increase also memory_limit. Recommendation is that memory_limit must
always be larger than post_max_size.
Changing ini directives can also be done by using PHP’s
ini_set() function. However this
will not work for upload_max_filesize directive because it is PHP_INI_PERDIR which cannot be changed at runtime.
More about this is described in the manual.
Keep in mind also that there are multiple php.ini files per PHP installation.
You can find out which ini files are loaded by executing php --ini in your
command line or going to a PHP information page generated by the
phpinfo() function.
