How to modify php.ini upload limit

In an environment using PHP, uploading files is a frequently used function. However, by default, the PHP configuration file sets a size limit for uploaded files, and this limit may not meet our actual needs. In order to solve this problem, we need to modify the upload limit in the php.ini file.

The php.ini file is the main configuration file of PHP, and the upload limit is determined by the following three parameters: upload_max_filesize, post_max_size and max_file_uploads. They respectively represent the upper limit of the file size allowed to be uploaded, the upper limit of the data size submitted by the POST method, and the upper limit of the number of files uploaded at one time.

Now we will introduce in detail how to modify the upload limit of php.ini.

Step 1: Find the php.ini file

First, we need to find the php.ini file. Normally, the php.ini file can be found in the php folder in the system directory. If you don’t know the specific location, you can use the following command to search:

sudo find / -name "php.ini"

Step 2: Back up the original php.ini file

Before modifying the php file, we need to back up the original php.ini file so that it can be restored in case of modification errors to avoid data loss. The backup method is very simple, just rename the php.ini file:

sudo cp /etc/php/7.2/apache2/php.ini /etc/php/7.2/apache2/php.ini .bak

If you need to restore the php.ini file, you can execute the following command:

sudo mv /etc/php/7.2/apache2/php.ini.bak /etc/php/7.2 /apache2/php.ini

Step 3: Modify the three parameter values ​​​​in the php.ini file

After backing up the php.ini file, we can use the editor to open php.ini file and find the following three parameters:

upload_max_filesize
post_max_size
max_file_uploads

By default, they are set to 2M, 8M and 20 respectively. We can modify these values ​​according to our needs. For example, if we want the maximum uploaded file to be 10M, we can modify the value of upload_max_filesize to 10M. (Note: The unit must be MB or KB)

upload_max_filesize = 10M
post_max_size = 10M
max_file_uploads = 50

After modification, save the modification and exit the editor.

Step 4: Restart the Apache or Nginx service

After completing the modification of the php.ini file, we need to restart the Apache or Nginx server for the modification to take effect. In Ubuntu system, you can use the following command to restart the Apache service:

sudo systemctl restart apache2

or restart the Nginx service:

sudo systemctl restart nginx

Of course, if it is another system, you can restart the Apache or Nginx server in different ways.

At this point, we have completed all the steps to modify the php.ini upload limit. The above operation is not difficult. As long as you follow the above steps, you can successfully modify the php.ini upload limit.

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