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Jul 7, 2022 · Let’s go! Here's what we'll cover in this handbook: Introduction to PHP. What Kind of Language is PHP? How to Setup PHP. How to Code Your First PHP Program. PHP Language Basics. How to Work with Strings in PHP. How to Use Built-in Functions for Numbers in PHP. How Arrays Work in PHP. How Conditionals Work in PHP. How Loops Work in PHP.
PHP 8 for Absolute Beginners: Basic Website and Web Application Development ISBN-13 (pbk): 978-1-4842-8204-5 ISBN-13 (electronic): 978-1-4842-8205-2
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- Pre-requisites
- What is PHP?
- What is MySQL?
- PHP + MySQL
- Why PHP?
- Where to Start?
- What do you need?
- Already have a web server?
- Download PHP
- Download MySQL Database
- Download Apache Server
- PHP Syntax
- Basic PHP Syntax
- Comments in PHP
- Variables in PHP
- PHP is a Loosely Typed Language
- PHP String Variables
- String Variables in PHP
- Hello World
- Complete PHP String Reference
- PHP Operators
- PHP If...Else Statements
- Conditional Statements
- The if Statement
- Syntax
- The if...else Statement
- Syntax
- Example
- The Statement
- Syntax
- Example
- PHP Switch Statement
- The PHP Switch Statement
- PHP Arrays
- Associative Arrays
- Multidimensional Arrays
- Complete PHP Array Reference
- PHP Looping - While Loops
- PHP Loops
- The while Loop
- The do...while Statement
- The number is 2 The number is 3 The number is 4 The number is 5 The number is 6
- PHP Looping - For Loops
- The for Loop
- Syntax
- Syntax
- Example
- PHP Built-in Functions
- PHP Functions
- Create a PHP Function
- Syntax
- Example
- PHP Functions - Adding parameters
- Example 1
- Example 2
- PHP Functions - Return values
- PHP Forms and User Input
- PHP Form Handling
- Example
- You are 28 years old.
- Form Validation
- The $_POST Function
- Name: Age:
- When to use method="post"?
- The PHP $_REQUEST Function
- Example
Before you continue you should have a basic understanding of the following: HTML/XHTML JavaScript
PHP stands for PHP: Hypertext Preprocessor PHP is a server-side scripting language, like ASP PHP scripts are executed on the server PHP supports many databases (MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.) PHP is an open source software PHP is free to download and use
MySQL is a database server MySQL is ideal for both small and large applications MySQL supports standard SQL MySQL compiles on a number of platforms MySQL is free to download and use
• PHP combined with MySQL are cross-platform (you can develop in Windows and serve on a Unix platform)
PHP runs on different platforms (Windows, Linux, Unix, etc.) PHP is compatible with almost all servers used today (Apache, IIS, etc.) PHP is FREE to download from the official PHP resource: www.php.net PHP is easy to learn and runs efficiently on the server side
To get access to a web server with PHP support, you can: Install Apache (or IIS) on your own server, install PHP, and MySQL Or find a web hosting plan with PHP and MySQL support
Most people would prefer to install a all-in-one solution:
If your server supports PHP you don't need to do anything. Just create some .php files in your web directory, and the server will parse them for you. Because it is free, most web hosts offer PHP support. However, if your server does not support PHP, you must install PHP. Here is a link to a good tutorial from PHP.net on how to install PHP5: http:/...
Download PHP for free here: http://www.php.net/downloads.php
Download MySQL for free here: http://www.mysql.com/downloads/index.html
Download Apache for free here: http://httpd.apache.org/download.cgi
PHP code is executed on the server, and the plain HTML result is sent to the browser.
A PHP scripting block always starts with . A PHP scripting block can be placed anywhere in the document. On servers with shorthand support enabled you can start a scripting block with . For maximum compatibility, we recommend that you use the standard form ( A ...
In PHP, we use // to make a single-line comment or /* and */ to make a large comment block.
Variables are used for storing a values, like text strings, numbers or arrays. When a variable is declared, it can be used over and over again in your script. All variables in PHP start with a $ sign symbol. The correct way of declaring a variable in PHP: $var_name = value; New PHP programmers often forget the $ sign at the beginning of the varia...
In PHP, a variable does not need to be declared before adding a value to it. In the example above, you see that you do not have to tell PHP which data type the variable is. PHP automatically converts the variable to the correct data type, depending on its value. In a strongly typed programming language, you have to declare (define) the type and nam...
A string variable is used to store and manipulate text.
String variables are used for values that contains characters. In this chapter we are going to look at the most common functions and operators used to manipulate strings in PHP. After we create a string we can manipulate it. A string can be used directly in a function or it can be stored in a variable. Below, the PHP script assigns the text "Hello ...
Now, lets try to use some different functions and operators to manipulate the string.
For a complete reference of all string functions, go to our complete PHP String Reference. The reference contains a brief description, and examples of use, for each function!
This section lists the different operators used in PHP.
Conditional statements are used to perform different actions based on different conditions.
Very often when you write code, you want to perform different actions for different decisions. You can use conditional statements in your code to do this. In PHP we have the following conditional statements: if statement - use this statement to execute some code only if a specified condition is true if...else statement - use this statement to exe...
Use the if statement to execute some code only if a specified condition is true.
if (condition) code to be executed if condition is true; The following example will output "Have a nice weekend!" if the current day is Friday: Notice that there is no ..else.. in this syntax. You tell the browser to execute some code only if the spec...
Use the if....else statement to execute some code if a condition is true and another code if a condition is false.
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6. Save the file as random.php, place it in the proper directory for your PHP-enabled server, and test it in your browser A. Refresh the page to see different numbers B. The getrandmax() function returns the largest possible random number that can be created using mt_rand().
This document provides a brief overview of PHP, several reasons for using PHP as a Web programming language, and a list of minimum requirements to begin working with PHP. What is PHP? PHP is a scripting language, created in 1994 by Rasmus Lerdorf, that is designed for producing dynamic Web content. PHP
This PHP built-in gives us the file name. Even if it is defined in $_FILES[’fil e’][’name’], it is always recommended to get file names using this function. Checking if the file is actually an uploaded file, in line 50. This function checks that the given file is really a file uploaded through HTTP POST.
Download Link. PHP Cheat Sheet – The Basics. We are starting off with the basics – how to declare PHP in a file, write comments, and output data. Including PHP in a File. PHP files end in .php. Besides PHP itself, they can contain text, HTML, CSS, and JavaScript.
