Learn PHP : Hour 2

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Lets start to learn more about basics of PHP.

Variables in PHP

Variables are used for storing a value, like text strings, numbers or arrays.

When a variable is set it can be used over and over again in your script

All variables in PHP start with a $ sign symbol.

The correct way of setting a variable in PHP:

$var_name = value;

New PHP programmers often forget the $ sign at the beginning of the variable. In that case it will not work.

Let's try creating a variable with a string, and a variable with a number:

<?php

$txt = "Hello World!";

$number = 16;

?>

Strings in PHP

String variables are used for values that contains character strings.

For Example: the PHP script assigns the string "Hello World" to a string variable called $txt:

<?php

$txt="Hello World";

echo $txt;

?>

The output of the code above will be:

Hello World

Using the strlen() function

The strlen() function is used to find the length of a string.

Let's find the length of our string "Hello world!":

<?php

echo strlen("Hello world!");

?>

The output of the code above will be:

12

***END Hour 2***

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