Introduction: Learn How to Program PHP Style
Tutorial: PHP Tutorial - the Basics
Author: laconix / inevitable_chaos
Description: Just the bare essentials to get you started in PHP.
Prerequisites: Basic html knowledge, a web server with PHP installed.
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Step 1: The Basics
Okay to get started create a basic html page like such:
<html><body></body></html>Okay you're familiar with this no doubt, now to add in the PHP.
<body><?phpecho "Hello World!";?></body></html>All this simple code does is echo Hello World onto the page.
The 2 most used commands to output information in PHP are print and echo.
Step 2: Variables
Have your code set up like before-hand.
To define a variable in PHP a $ precedes the variable name. For example.
<body><?php$hw = "Hello World!";?></body></html>Now a variable by itself doesn't do anything really, you need to do something with it!
<body><?php$hw = "Hello World!";echo $hw;?></body></html>All this bit of code does is store Hello World! in a variable called $hw, then echos "Hello World!" onto the page.
If all went well it should look like this: Hello World
Step 3: Statements
Okay now we're getting a little more difficult!
Start off with a basic PHP model.
<body><?php?></body></html>Now add in code to make the variable $pie and $number, and store the string "I like pie!" and 1 in them respectively.
If you got it right it should look like such:
<body><?php$pie = "I like pie!";$number = 1;?></body></html>Now for the slightly more difficult part, an IF statement.
<body><?php$pie = "I like pie!";$number = 1;echo "Who likes pie?";if ($number != 1) echo "You didn&apost store the right number in the variable $number!";else echo "<br>" . $pie; ?></body></html>Okay I should now explain the basic operators in PHP.
"!=" - does not equal
"==" - does equal
">" - greater than
">=" - greater than or equal to
"<" - smaller than
"<=" - smaller than or equal to
To separate things in an echo us a period "."
The basic IF statement is structured as such:
do thiselse do this
If all went well it should look like this: Statements
You have just learnt the basics of PHP, go and play around with your new learnt skill.
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