How to install php on Red Hat Linux? Step sharing

Linux, as the most widely used open source operating system in the world, provides developers with the ultimate degree of freedom. As a popular programming language, php also successfully runs on the Linux platform. This article will introduce the steps to install Red Hat's php on Linux.

1. Preparation work

Before we start, we need to prepare some work:

• A computer running Red Hat Linux server
• root administrator rights
• Make sure the server has installed Apache, MySQL and other necessary services

2. Install PHP

The first step is to install PHP. Under Linux, you can use yum to install PHP.

If you don’t have yum in your system, you need to install it first. You can use the following command:

sudo apt-get install yum

Next, run the following command to install php:

sudo yum install php

During this process, the system will automatically resolve the dependencies required by PHP.

3. Configuring PHP

Now, PHP is installed on your computer. However, it must be configured with the web server to work properly. You will need to edit PHP's configuration file php.ini.

In Linux systems, php.ini is usually located at the following path:

/etc/php.ini

In the case of Ubuntu web server, the php.ini file is located at the following path:

/etc/php/7.0/apache2/php.ini

You You can choose to use the vim editor to open the php.ini file:

sudo vim /etc/php.ini

In the php.ini file, you can change the runtime parameters of PHP, including the size limit of uploaded files and data caching. For example, to increase the limit of file upload size, search for the following line:

; Maximum allowed size for uploaded files.
; http://php.net/upload-max-filesize
upload_max_filesize = 2M

Change the "upload_max_filesize" value to the desired size, for example:

upload_max_filesize = 64M

Likewise, if you want to increase PHP Memory limit, the following settings can be changed:

; Maximum amount of memory a script may consume (128MB)
; http://php.net/memory-limit
memory_limit = 128M

When you have finished making changes, save the php.ini file and exit the editor.

4. Test PHP

After completing the installation and configuration, test whether PHP is installed correctly. Make sure your web server is up and running, then create a phpinfo.php file and upload it to your web server's document root (by default it is located in /var/www/html/).

Add the following code in the file:

<?php
phpinfo();
?>

Now, open your web browser and enter the following URL:

http://your_server_domain_or_IP/phpinfo.php

If PHP has been installed and configured correctly, you will see a Page containing server and PHP information.

5. Install PHP manually

If you want to install PHP using a different method than the yum package manager, try installing it manually. Download the php source files and dependencies:

sudo wget https://www.php.net/distributions/php-7.2.15.tar.gz
sudo yum install libxml2-devel openssl-devel bzip2-devel libjpeg-devel libpng-devel libwebp-devel libXpm-devel freetype-devel

Now, unzip the php source files and go into this directory:

sudo tar xf php-7.2.15.tar.gz
cd php-7.2.15

Run the following command to configure PHP to use the Apache web server:

sudo ./configure --with-apxs2=/usr/bin/apxs --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd --enable-mysqlnd --with-zlib --with-gd --with-openssl --with-curl

Next, compile and install PHP using the following command:

sudo make
sudo make install

During this process, the system will install all required PHP modules. Once installed, you will need to configure the PHP plugin for Apache. Under the Ubuntu web server, use the following command to enable the php plug-in:

sudo a2enmod php7.0

At this point, you have completed the steps to install php on Linux.

Summary:

To install PHP on Linux, you can use the yum package manager to simplify the process, and use the editor to configure PHP, while manual installation of PHP requires Some compilation tools. By reading this article, you have learned how to install PHP on Linux and configure a web server for it, including checking whether the installation is successful and manual installation.

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