Php Tutorial Variables:
PHP Variables may contain strings, numbers, or arrays.
Below, the PHP script assigns the string "Hello World" to a variable called $txt:
<?php
$txt="hello world";
echo $txt;
?>
The output when uploaded to your web server would be hello world.
To concatenate two or more (String) variables together, use the dot (.) operator:
<?php
$txt1="hello world";
$txt2="1234";
echo $txt1 . " " . $txt2 ;
?>
The output when uploaded to your web server would be hello world 1234.
PHP also contains the standard arimetic operators + - / * %. As we mentioned earlies all PHP variable may contain strings, numbers, or arrays. For numbers we drop the inverted commas ""; example
<?php
$add = 4 + 4;
$subtract = 8 - 4;
$multiplication = 5 * 3;
$division = 12 / 3;
$modulus = 5 % 2;
echo "add 4 + 4 equals $add";
echo "subtract 8 - 4 equals $subtract";
?>
As you can see above $add has now been given the value 8. Echo should output to the screen add 4 + 4 equals 8.
