Install PHPMailer on CentOS Systems

This section provides a tutorial example on how to install PHPMailer on CentOS systems.

Using the mail() function can only send out emails through the "sendmail" command on the local system.

If you want to send out emails through remote mail servers, you can use the PHPMailer package.

PHPMailer has the following features:

Here is what I did to install PHPMailer on my CentOS 8 computer.

1. Make sure you have PHP Composer installed:

herong$ /usr/local/bin/composer --version
  Composer version 2.1.3 2021-06-09 16:31:20

2. Using "composer require" command to install PHPMailer:

herong$ /usr/local/bin/composer require phpmailer/phpmailer
Using version ^6.4 for phpmailer/phpmailer
./composer.json has been created
Running composer update phpmailer/phpmailer
Loading composer repositories with package information
Updating dependencies
Lock file operations: 1 install, 0 updates, 0 removals
  - Locking phpmailer/phpmailer (v6.4.1)
Writing lock file
Installing dependencies from lock file (including require-dev)
Package operations: 1 install, 0 updates, 0 removals
  - Downloading phpmailer/phpmailer (v6.4.1)
  - Installing phpmailer/phpmailer (v6.4.1): Extracting archive

3. Find the PHPMailer class directory:

herong$ /usr/local/bin/composer show phpmailer/phpmailer
  name     : phpmailer/phpmailer
  descrip. : PHPMailer is a full-featured email creation and transfer
             class for PHP
  keywords :
  versions : * v6.4.1
  path     : /home/herong/local/php/vendor/phpmailer/phpmailer
  names    : phpmailer/phpmailer

4. Write a PHP script to test the PHPMailer class:

herong$ vi PHPMail-Test.php

<?php
#  PHPMailer-Test.php
#- Copyright 2019 (c) HerongYang.com. All Rights Reserved.

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;

$srcDir = "/home/herong/local/php/vendor/phpmailer/phpmailer/src/";
require "$srcDir/PHPMailer.php";
require "$srcDir/SMTP.php";
require "$srcDir/Exception.php";

$mail = new PHPMailer(true);

herong$ php PHPMail-Test.php
?>

I see no error messages from PHPMailer-Test.php execution, so PHPMailer is installed correctly on my CentOS computer.

Table of Contents

 About This Book

 Introduction and Installation of PHP 7.3

 PHP Script File Syntax

 PHP Data Types and Data Literals

 Variables, References, and Constants

 Expressions, Operations and Type Conversions

 Conditional Statements - "if" and "switch"

 Loop Statements - "while", "for", and "do ... while"

 Function Declaration, Arguments, and Return Values

 Arrays - Ordered Maps

 Interface with Operating System

 Introduction of Class and Object

 Integrating PHP with Apache Web Server

 Retrieving Information from HTTP Requests

 Creating and Managing Sessions in PHP Scripts

 Sending and Receiving Cookies in PHP Scripts

 Controlling HTTP Response Header Lines in PHP Scripts

 Managing File Upload

 MySQL Server Connection and Access Functions

 Functions to Manage Directories, Files and Images

 SOAP Extension Function and Calling Web Services

 SOAP Server Functions and Examples

 Localization Overview of Web Applications

 Using Non-ASCII Characters in HTML Documents

 Using Non-ASCII Characters as PHP Script String Literals

 Receiving Non-ASCII Characters from Input Forms

 "mbstring" Extension and Non-ASCII Encoding Management

 Managing Non-ASCII Character Strings with MySQL Servers

 Parsing and Managing HTML Documents

Configuring and Sending Out Emails

 Using Local Windows System as a Mail Server

 Sending Out Emails from PHP Scripts

 Sending Out Emails on Linux Systems

Install PHPMailer on CentOS Systems

 Send Local Emails with PHPMailer

 Send Remote Emails with PHPMailer

 Use SMTPS Protocol with PHPMailer

 PHP 5.6 and PHPMailer 5.2

 Install PHPMailer from Source Code

 Image and Picture Processing

 Managing ZIP Archive Files

 Managing PHP Engine and Modules on macOS

 Managing PHP Engine and Modules on CentOS

 Archived Tutorials

 References

 Full Version in PDF/EPUB