mirror of
https://github.com/restoreddev/phpapprentice.git
synced 2025-07-11 10:36:21 +02:00
32 lines
1.2 KiB
PHP
32 lines
1.2 KiB
PHP
<?php
|
|
|
|
// The variable is the basic building block of any programming language.
|
|
// In PHP, all variables start with a dollar sign.
|
|
$greeting;
|
|
|
|
// To set data in a variable, you put an equals sign after it and some data.
|
|
$greeting = 'Hello World!';
|
|
|
|
// Once you create a variable, you can use it again in other commands and functions.
|
|
echo $greeting;
|
|
|
|
// After the dollar sign, a PHP variable must have an alphabetic character or underscore. Also, variables are case sensitive.
|
|
$_var = 'I am a variable with an underscore!';
|
|
$Var = 'I am a variable with a capital letter!';
|
|
$var = 'I am a new variable';
|
|
|
|
// Variables can hold many different types of data, but there are four simple ones you can try now.
|
|
// An int is a number without a decimal place.
|
|
// A float is a number with a decimal place.
|
|
// A boolean can be two values: true or false.
|
|
// Last, there is a string, a collection of characters.
|
|
$int = 1;
|
|
$float = 100.10;
|
|
$bool = true;
|
|
$string = 'I am a string';
|
|
|
|
// In other programming languages, you have to write what type of data the variable will contain.
|
|
// PHP keeps it simple by allowing you to put any type of data in a variable, including already used variables.
|
|
$number = 1;
|
|
$number = 'one';
|