[Tutorial] Very Basic

[octopi]

Basic Tutorial

The most basic php program

code:

<?php   header("Content-type: text/html\n\n");   echo "Text"; ?>

To print data, you can use either the print, echo, or header function.
Header is used to output headers to the browser.

code:

header("Content-type: text/html\n\n");

Print and echo are used to output data.

code:

print ("text");   print "text";   echo "text";

Varibles:

code:

$name="Name"; echo "$name"; //outputs: 'Name'

Getting data from the user:
There are two methods to get data from the user, GET, and POST
When someone accesses your program like this

program.php?name=SOMETHING

That is using the GET method.

When someone uses a form it can either be in GET, or POST

code:

<form method="GET"> ... </form>

OR

code:

<form method="POST"> ... </form>

To access these varibles you can do:

code:

$name=$_GET['name']; //or $name=$_POST['name'];

or this:

code:

($name=$_GET['name']) || ($name=$_POST['name']);

the above will get the GET, and POST methods (usually there is only one method used at a time, so it shouldn't be a problem)


Conditionals:

code:

if($name) {    //if name has a value   echo "stuff here"; }

code:

if(!$name) {     //if name doesn't exist   echo "stuff here"; }

code:

if($name == "octopi") {   echo "stuff here"; }

code:

if($name == $somethingelse) {   echo "stuff here"; } elseif ($name == $myotherthing) {   echo "check this if the above fails"; } else {   echo "something else"; }