<?php
$a = "Alexa";
//This sets the variable $a to a string value (Alexa)
$b = 6;
//This sets the variable $b equal to a number value (6)
?> <?php
$a = 3 + 5;
//This sets the variable $a equal to 8 or (3 + 5)
$b = 6 + $a;
//This sets the variable $b equal to 14, or (6 + $a)
?> <?php
$a = 1;
$b = 2;
$c = $a.$b;
//The value of $c is now 12, because we smashed the 1 and 2 together
$d= $c + 1 ;
echo $d;
// This will echo 13, our newly created 12 plus 1 is 13
$e = "Number";
$f = $e.$d;
echo $f;
//This will echo the string Number13, a combination of $e and $f
?> Another thing you can do is make a variable from a string by using {} symbols. So, by using this method you could pass a string from one page to another, and use that string to pull the information from a variable of the same name. Here is an example:
<?php
$a= "SomeVar";
$SomeVar= "test";
echo ${$a};
?> 