Increase the upload limit in PHP

Symptom

You can upload files of a limited size through webmail or PHP, but if you try to attach a large file to an email or upload it to a website, you may encounter errors related to the file size. This is because PHP limits file uploads to a certain size by default, and you need to modify certain values to increase it.

Solution

The variables you need to modify to increase the limit are as follows:

upload_max_filesize = 2M
post_max_size = 8M

• upload_max_filesize: Replace 2M with the desired maximum size in MB
• post_max_size: Replace 8M with the desired maximum size in MB + the size of the PHP form (e.g.: message text)

There are also other limits that affect the maximum attachment size PHP can handle, which you will need to review to ensure that the changes work correctly:

max_execution_time = 30
memory_limit = 64M

• max_execution_time = 30: If you want to increase the upload limit in PHP, you will also need to increase this value depending on the maximum number of bytes set above
• memory_limit = 64M: You also need to increase this value because it controls the maximum memory a script can consume

Once you have made the changes, you need to restart the Cloud Server's web service. This can usually be done with the command:

# /etc/init.d/apache2 restart

Or:

# /etc/init.d/httpd restart

The memory_limit variable must be greater than the post_max_size variable.

When making these changes, keep in mind that the post_max_size variable must be greater than upload_max_filesize.