A variable is like your binder, you store data in it and when you need it you can simply pull it out.

All variables have $ before them this is how you know it is a variable.

Variables can store a integer, string, Boolean.

Integers are numbers
Strings are words
Booleans are like true or false

We start php files with <?php and end it with ?>

<?php

$int = 2;
$int2 = 5;
$int3 = $int + $int2;

echo $int + $int2;

echo $int3;
?>

That will echo the number 7 to the screen. Twice sense we told it to echo int + int2 and then we told it to echo int3

Now lets move on to strings, what can we use them for?
you can use . to combine to thing like you will see below

<?php

$user1 = "Mike";
$user2 = "Jason";

echo $user1 . "and" . $user2 . "are good friends.";
?>

Boolean Variable

<?php

$boolean = false;

$IdontLie = true;

if($IdontLie == true){
$boolean = true;
}
echo $boolean;
?>
This one is unique it will not echo true as you may assume it will actually echo the number 1 which in a Boolean equals true while 0 will equal false. Do not worry about the if statement at this time since you will learn about it later one.

What this will do is post on the screen that Mike and Jason are good friends.

nice i understand what is variable main, i never ever try to learn php or htlm
yes a variable much be declare
al though i never see a php programming tutoral right the i can tell
u declare it
$int a = 2; // u assign the number 2 to a
$int2 = 5; // u assign 5 to 2 ?
$int3 = $int + $int2; // 3 = 2 + 5 if i mess up in here tell me i dont understand php

yes bool i also got a great understand a bool can take in more then one or 2 vaule like for explame

bool speed = false
bool health = true

You are making errors

You can not add a space to your variable name.

$variable
NOT $variable two
Correct would be... $variableTwo