Variables
Variables keep a value for future reference. This value can change if we want it to; that is why they are called variables. Let's take a look at them in an example. Save this code in your index.php
file:
<?php $a = 1; $b = 2; $c = $a + $b; echo $c; // 3
In this preceding piece of code, we have three variables: $a
has value 1
, $b
has 2
, and $c
contains the sum of $a
and $b
, hence, $c
equals 3. Your browser should print the value of the variable $c
, which is 3.
Assigning a value to a variable means to give it a value, and it is done with the equals sign as shown in the previous example. If you did not assign a value to a variable, we will get a notice from PHP when it checks its contents. A notice is just a message telling us that something ...
Get Learning PHP 7 now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.