Install DOM Extension on CentOS

PHP Modules Tutorials - Herong's Tutorial Examples

∟Install DOM Extension on CentOS

This section provides a tutorial example on how to install PHP DOM Extension on CentOS systems.

On some Linux systems, you may need to install PHP DOM Extension explicitly. Here is what I did on my CentOS computer.

1. Try an PHP script that uses the DOM Extension. You see the "Class 'DOMDocument' not found" error.

herong$ php Create-HTML-DOM-Document.php output.html

PHP Fatal error:  Uncaught Error: Class 'DOMDocument' not found
  in /home/herong/Create-HTML-DOM-Document.php:7

2. Search for the DOM Extension binary package using "xml" as the keyword, not "dom", not "html".

herong$ dnf search php | grep xml

php-xml.x86_64 : A module for PHP applications which use XML
...

3. Install the DOM Extension binary package.

herong$ sudo dnf install php-xml

Installed:
  php-xml-7.2.24-1.module_el8.2.0+313+b04d0a66.x86_64

4. Try the PHP script again. It should work now.

herong$ php Create-HTML-DOM-Document.php hello.html

herong$ more hello.html
<html><body bgcolor="#ddddff"><p>Hello World!</p></body></html>

Table of Contents

About This Book

Introduction and Installation of PHP

Managing PHP Engine and Modules on macOS

Managing PHP Engine and Modules on CentOS

cURL Module - Client for URL

►DOM Module - Parsing HTML Documents

DOM (Document Object Model) Module

Parse and Traverse HTML Documents

Build New HTML Documents

Load HTML Documents with LIBXML_NOBLANKS

Remove Whitespaces in HTML Documents

DOCTYPE Element in HTML Documents

Remove Dummy Elements in HTML Documents

►Install DOM Extension on CentOS

GD Module - Manipulating Images and Pictures

MySQLi Module - Accessing MySQL Server

OpenSSL Module - Cryptography and SSL/TLS Toolkit

PCRE Module - Perl Compatible Regular Expressions

SOAP Module - Creating and Calling Web Services

SOAP Module - Server Functions and Examples

Zip Module - Managing ZIP Archive Files

References

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