Change PHP Configuration Settings

Provides a tutorial example on how to change PHP configuration settings, like increasing upload_max_filesize and post_max_size to upload large files with PHP scripts.

If you are running a Website using PHP scripts, you may want to change some default configuration settings.

For example, PHP scripts will support only up to 2 MB for a single upload file by default. If you want to increase this limit to 10 MB, you need to following these steps on your Linux computer.

1. Modify two configuration settings in the php.ini file.

herong$ sudo vi /etc/php.ini

...
post_max_size = 10M
...
upload_max_filesize = 10M
...

2. Restart the php-fpm service used by the Apache httpd server.

herong$ systemctl restart php-fpm

==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ====
Authentication is required to restart 'php-fpm.service'.
Authenticating as: Herong Yang (herong)
Password:
==== AUTHENTICATION COMPLETE ====

3. Verify the new settings by running the test_phpinfo.php script at http://localhost/test/test_phpinfo.php. You should see:

Directive             Local Value      Master Value

...
post_max_size         10M              10M
upload_max_filesize   10M              10M
...

Now you can upload large files with your PHP scripts.

Table of Contents

 About This Book

 Introduction to Linux Systems

 Cockpit - Web Portal for Administrator

 Process Management

 Files and Directories

 Users and Groups

 File Systems

 Block Devices and Partitions

 LVM (Logical Volume Manager)

 Installing CentOS

 SELinux - Security-Enhanced Linux

 Network Connection on CentOS

 Software Package Manager on CentOS - DNF and YUM

 Running Apache Web Server (httpd) on Linux Systems

Running PHP Scripts on Linux Systems

 Install and Manage PHP Packages on CentOS

 "php -i" - Dump PHP Environment Information

 Install and Manage PHP Modules on CentOS

 Files Used in PHP "include" Statements

 Publish PHP Scripts on Apache Web Server

 Dump PHP/Apache Environment Information

Change PHP Configuration Settings

 Apache PHP file_put_contents() Permission Denied

 SELinux Security Context on /var/www/html

 Migrate Old Scripts to New PHP Release

 Running MySQL Database Server on Linux Systems

 Running Python Scripts on Linux Systems

 vsftpd - Very Secure FTP Daemon

 Postfix - Mail Transport Agent (MTA)

 Dovecot - IMAP and POP3 Server

 Email Client Tools - Mail User Agents (MUA)

 LDAP (Lightweight Directory Access Protocol)

 GCC - C/C++ Compiler

 Conda - Environment and Package Manager

 Tools and Utilities

 Administrative Tasks

 References

 Full Version in PDF/EPUB