Hello.php - My First PHP Script

PHP Tutorials - Herong's Tutorial Examples

∟Hello.php - My First PHP Script

This section provides a tutorial example on how to write the first PHP script, Hello.php, and run it with PHP CLI and PHP CGI.

Use any text editor like notepad, and enter the first PHP script, Hello.php:

Hello <?php echo "world!"; ?>

Run it with PHP CLI first:

herong> \php\php Hello.php

Hello world!

Then run it with PHP CGI:

herong> \php\php-cgi Hello.php

X-Powered-By: PHP/7.3.0
Content-type: text/html; charset=UTF-8

Hello world!

As expected, both versions of the PHP engine worked nicely. PHP CGI version did generate the HTTP response header for me.

But note that the "Content-type" in PHP 7.3 is set to "UTF-8", which is different than PHP 5.6. See output from PHP 5.6:

>\php5.6\php-cgi Hello.php
Content-type: text/html
X-Powered-By: PHP/5.6.6

Hello world!

Table of Contents

About This Book

►Introduction and Installation of PHP

What Is PHP

Downloading and Installing PHP 7.3 for Windows

"php -help" - Command Line Options

"php -m" - Built-in Modules

"php -i" - PHP Engine Information

php.ini - PHP Runtime Configuration

►Hello.php - My First PHP Script

"php -a" - PHP Interactive Shell

Downloading and Installing PHP Documentation

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

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