Getting Started With Variables

1. PHP Syntax

The PHP script strat with less than and question mark signs (<?) and end with question mark and greater than sign (?>) any code will be written between these tags.

<?

echo "My First Page of PHP";

echo "I am learning PHP";

?>

2. What is a Variable?

A variable is a container that stores the information that you want to use on the page for later use. You can save text and numbers in variable. As the name shows it’s a variable so you can change values (text or number) in variable.

Any text with $ sign will become variable in php

<?

$myNum=1;

$myText="This is my first variable text.";

?>

 Variables are case sensitive.

3. Joining direct text and variable data

   $myText="This is my first variable test.";

   $myJoinText=$myText." This is the joing text with variable.";

   $myJoinText2="This is Text1."." This is Text2.";  

   echo $myJoinText;

   echo $myJoinText2;

   Note

     The "." dot sign used to concat the two variables or strings.

4. Adding up in PHP

To add one number to another, the + symbol is used in PHP. If you see 4 + 3, it means add 3 into 4.

<?   

echo 2+2;

$a=4;

$b=3;

echo $a+$b;

$add=$a+$b;

echo "The added values are = ".$add;

?>

  
5. Subtraction

To subtract one number from another, the - symbol is used in PHP. If you see 4 - 3, it means subtract 3 from 4.

<?   

echo 2-2;

$a=4;

$b=3;

echo $a-$b;

$subtract=$a-$b;

echo "The subtracted values are = ".$subtract;

?>

6. Multiplication

To multiply two numbers, the * symbol is used in PHP. If you see 4 * 3, it means multiply 3 with 4.

<?   

echo 2*2;

$a=4;

$b=3;

echo $a*$b;

$multiply=$a*$b;

echo "The multiplicated values are = ".$multiply;

?>

7. Division

To divide two numbers, the / symbol is used in PHP. If you see 4 / 2, it means divide 4 by 2.

<?   

echo 2/2;

$a=4;

$b=2;

echo $a/$b;

$divide=$a/$b;

echo "The divided values are = ".$divide;

?>

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