Coding website using php

PHP Syntax

A PHP script is executed on the server, and the plain HTML result is sent back to the browser.

Basic PHP Syntax

A PHP script can be placed anywhere in the document.

The default file extension for PHP files is » .php «.

A PHP file normally contains HTML tags, and some PHP scripting code.

Below, we have an example of a simple PHP file, with a PHP script that uses a built-in PHP function » echo » to output the text «Hello World!» on a web page:

Example

My first PHP page

Note: PHP statements end with a semicolon ( ; ).

PHP Case Sensitivity

In PHP, keywords (e.g. if , else , while , echo , etc.), classes, functions, and user-defined functions are not case-sensitive.

In the example below, all three echo statements below are equal and legal:

Example

Note: However; all variable names are case-sensitive!

Look at the example below; only the first statement will display the value of the $color variable! This is because $color , $COLOR , and $coLOR are treated as three different variables:

Example

$color = «red»;
echo «My car is » . $color . «
«;
echo «My house is » . $COLOR . «
«;
echo «My boat is » . $coLOR . «
«;
?>

PHP Exercises

COLOR PICKER

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How to develop a website using HTML, CSS PHP and MySQL?

Step-by-Step guide to create dynamic web pages using HTML, CSS, PHP & MySQL.

This post is for the persons who are beginners in the web development field.

In this post, I will cover everything step by step starting from designing and development. At the last we will see how to deploy the website online.

Steps to create a website:

1. Download and install a code editor on your computer for writing HTML, PHP etc. code.
2. Download and install XAMPP Server on your computer.
3. Start Apache and MySQL server.
4. Start designing and developing your website with SQL queries.
5. Test your website on your computer.
6. Deploy your website on online server.

Step 1: Download a code editor

There are very code editors available for free like visual code, notepad++, Sublime etc. Download and install any one of them.

Step 2: Download XAMPP

Download and install XAMPP Server on your computer. XAMPP is the most popular PHP development environment. XAMPP is a completely free, easy to install Apache distribution containing MariaDB, PHP, and Perl.

XAMPP is an abbreviation for cross-platform, Apache, MySQL, PHP and Perl, and it allows you to build and run PHP offline, on a local web server on your computer. This simple and lightweight solution works on Windows, Linux, and Mac – hence the “cross-platform” part.

Step 3: Start Apache and MySQL

After installing the XAMPP, you have to run it on your computer. Also make sure you start Apache and MySQL Server. If your Apache and MySQL Server, it will show as the image below.

Step 4: Write HTML, CSS, PHP, SQL code

Now it is the time to write your HTML and PHP files.
Create a separate folder for your website in htdocs folder of XAMPP. You can find your XAMPP in c. (C:\xampp\htdocs). Inside this folder, you have to keep your coding files.

Tip: Your homepage will be known by name: index.html or index.php.

You can create the database for your website through phpmyadmin.

Step 5: Test your website locally on your computer

Keep testing your code in your browser through local host. This is XAMPP comes into handy for this purpose.

Step 6: Deploy your website

When your website is complete. You have to purchase a hosting and a domain for your website. Hosting provider allocates space on a web server for a website to store its files

When to use index.php instead of index.html?

you will have to choose the PHP extension (.php) when you want php code to be executed in the file. PHP code is code between the opening tags.

When no PHP code should be executed you can use the .html extension.

Usually when using the .php extension you are telling the web server, that it should use a PHP interpreter to process the file before it will be delivered to the browser. The PHP interpreter will then replace all content between the by the output of the PHP code. Just as if you wrote it manually. The processed file will then be delivered to the browser.

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PHP Syntax

A PHP script is executed on the server, and the plain HTML result is sent back to the browser.

Basic PHP Syntax

A PHP script can be placed anywhere in the document.

The default file extension for PHP files is » .php «.

A PHP file normally contains HTML tags, and some PHP scripting code.

Below, we have an example of a simple PHP file, with a PHP script that uses a built-in PHP function » echo » to output the text «Hello World!» on a web page:

Example

My first PHP page

Note: PHP statements end with a semicolon ( ; ).

PHP Case Sensitivity

In PHP, keywords (e.g. if , else , while , echo , etc.), classes, functions, and user-defined functions are not case-sensitive.

In the example below, all three echo statements below are equal and legal:

Example

Note: However; all variable names are case-sensitive!

Look at the example below; only the first statement will display the value of the $color variable! This is because $color , $COLOR , and $coLOR are treated as three different variables:

Example

$color = «red»;
echo «My car is » . $color . «
«;
echo «My house is » . $COLOR . «
«;
echo «My boat is » . $coLOR . «
«;
?>

PHP Exercises

COLOR PICKER

Report Error

If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:

Thank You For Helping Us!

Your message has been sent to W3Schools.

Top Tutorials

Top References

Top Examples

Get Certified

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Источник