PHP Tips & Notes

php-nginx

Compile PHP 5.6 on CentOS

Step 1: Install required dependencies

Before we start compiling PHP, we need to install some required dependencies. Open the terminal and type the following command:

yum install gcc make openssl-devel libxml2-devel bzip2-devel libcurl-devel libjpeg-devel libpng-devel freetype-devel libmcrypt-devel

This command will install all the necessary dependencies required to compile PHP.

Step 2: Download PHP 5.6

Next, we need to download the PHP 5.6 source code from the official website. Open the terminal and run the following command:

wget https://www.php.net/distributions/php-5.6.40.tar.gz

This command will download the PHP 5.6 source code to your server.

Step 3: Extract the source code

Once the download is complete, we need to extract the source code. Run the following command to extract the source code:

tar -zxvf php-5.6.40.tar.gz

This command will extract the source code to a new directory named ‘php-5.6.40’.

Step 4: Configure PHP

Now that we have extracted the source code, we need to configure PHP for our server. Run the following command to configure PHP:

cd php-5.6.40
./configure --prefix=/usr/local/php5.6 --with-config-file-path=/usr/local/php5.6/etc --with-apxs2=/usr/sbin/apxs --enable-mbstring --with-curl --with-openssl --with-zlib --with-gettext --with-gd --with-jpeg-dir=/usr/lib --with-png-dir=/usr/lib --with-freetype-dir=/usr/lib --with-mcrypt

This command will configure PHP with the required options.

Step 5: Compile PHP

Once the configuration is complete, we can now compile PHP. Run the following command to compile PHP:

make

This command will compile PHP with the options we configured in the previous step.

Step 6: Install PHP

After the compilation is complete, we can now install PHP. Run the following command to install PHP:

make install

This command will install PHP on your server.

Step 7: Verify PHP installation

Finally, we can verify the PHP installation by running the following command:

/usr/local/php5.6/bin/php -v

This command will display the PHP version installed on your server.

Install PHP on Ubuntu

For PHP 8.3

sudo apt install php8.3 -y

For PHP 8.2

sudo apt install php8.2 -y

For PHP 7.4

sudo apt install php7.4 -y

Install PHP Extensions

sudo apt install phpX.X-extension_name
sudo apt install php8.3-mysql

Install phpMyAdmin on CentOS

Prerequisites

Before proceeding with the installation process, you must have the following prerequisites:

A CentOS server with root access
Apache web server installed and running
PHP installed and running
MySQL or MariaDB installed and running

Installing phpMyAdmin

To install phpMyAdmin on CentOS, follow the steps below:

Open a terminal window and log in as root.
Run the following command to install the EPEL repository:
```
yum install epel-release
```
Once the repository is installed, run the following command to install phpMyAdmin:
```
yum install phpMyAdmin
```
After the installation process is complete, open the phpMyAdmin configuration file using your preferred text editor:
```
vim /etc/httpd/conf.d/phpMyAdmin.conf
```
Uncomment the following line by removing the ‘#’ symbol at the beginning of the line:
```
# Require ip 127.0.0.1
```
Save and close the file.
Restart the Apache web server:
```
systemctl restart httpd
```
Open a web browser and navigate to your server’s IP address followed by ‘/phpMyAdmin’. For example, if your server’s IP address is 192.168.1.100, navigate to:
```
<http://192.168.1.100/phpMyAdmin>
```
You will be prompted to enter your MySQL/MariaDB username and password. Once you have entered them, click on the ‘Go’ button.

PHP Error Summary

PHP configure error mcrypt.h not found

download libmcrypt

wget http://jaist.dl.sourceforge.net/project/mcrypt/Libmcrypt/2.5.8/libmcrypt-2.5.8.tar.gz

exact

tar -zxvf libmcrypt-2.5.8.tar.gz

config compile parameter

cd libmcrypt-2.5.8
./configure

compile and install

make && make install

PHP 5.6 failed to open configuration file

Problem

After PHP is compiled and installed, it fails to start, prompting

1 [23-Jun-2014 12:27:02] ERROR: failed to open configuration file '/usr/local/php/etc/php-fpm.conf': No such file or directory (2)
2 [23-Jun-2014 12:27:02] ERROR: failed to load configuration file '/usr/local/php/etc/php-fpm.conf'
3 [23-Jun-2014 12:27:02] ERROR: FPM initialization failed

Reason: The configuration file is not ready

Solution

Copy php-fpm.conf.default to php-fpm.conf

cp php-fpm.conf.default php-fpm.conf

Call Python in PHP code

phpy is a Python and PHP interoperability library that allows you to use Python functions and libraries in PHP, or use PHP packages in Python. However, it is not language embedding. The encoding still uses their respective native syntax.

phpy enables PHP to call all Python packages, including popular libraries such as PyTorch, transformers, TensorFlow, as well as scientific computing libraries like Numpy, Pandas, Scikit, and graphical interface libraries such as PyQt, wxPython.

Currently, it only supports Linux platform (theoretically can support all operating systems, to be implemented)
Does not support Python multi-threading and async-io features

Calling Python from PHP

Compile and install phpy.so as an extension, then modify php.ini to add extension=phpy.so.

Example:

$os = PyCore::import("os");
$un = $os->uname();
echo strval($un);

Calling PHP in Python

You can directly use it as a C++ Module by importing and loading it.

import phpy

content = phpy.call('file_get_contents', 'test.txt')

o = phpy.Object('redis')
assert o.call('connect', '127.0.0.1', 6379)
rdata = phpy.call('uniqid')
assert o.call('set', 'key', rdata)
assert o.call('get', 'key') == rdata

Both ZendVM and CPython VM are created within the same process. They directly call each other using C functions within the process stack space. The only overhead is the conversion between zval and PyObject structures, making it highly efficient.

Example of implementing a GUI using tkinter

<?php
$tkinter = PyCore::import('tkinter');
$root = $tkinter->Tk();
$root->title('windows');
$root->geometry("500x500");
$root->resizable(False, False);

$button = $tkinter->Button($root, text: "Click Me!!", command: PyCore::fn(function () {
    var_dump(func_get_args());
    echo 'click me!!' . PHP_EOL;
}));
$button->pack();

$tkinter->mainloop();

Reference

https://www.php.net/
Top PHP Monitoring Tools https://www.atatus.com/blog/php-monitoring-tools/
How to Install PHP https://tecadmin.net/how-to-install-php-on-ubuntu-24-04/
Mastering PHP Configuration https://www.atatus.com/blog/php-configuration-php-value-php-admin-value-and-php-flag-directives/
Install a LAMP server https://rdr-it.io/en/ubuntu-22-04-install-a-lamp-server-linux-apache-mariadb-php/
Install Lighttpd with MariaDB and PHP-FPM https://www.howtoforge.com/how-to-install-lighttpd-with-mariadb-and-php-fpm-on-ubuntu-22-04/
Setup Nginx with PHP-FPM https://tecadmin.net/how-to-setup-nginx-with-php-fpm-on-ubuntu-24-04/
https://github.com/swoole/phpy

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