PHP Variables & Comments 01

PHP Course
PHP is a server scripting language, powerful tool for
making dynamic and interactive Web pages..
This presentation provide you with PHP source code and the HTML
output of that code………….Enjoy!.
PHP Course Info@ITBigDig.com

Instructor
 Name: Mohamed Saad.
 Email: Engsaad_aly@hotmail.com
 Occupation: Web Developer In IT Big Dig.

PHP Course
1: Variables & Comments

Naming Rules
• $ sign then Name of the variable.
• Begin with a letter or the underscore character.
• Name can only contain alpha-numeric characters and
underscores.
• Name Should not contain spaces.
• Variable names are case sensitive.
• No command for declaring a variable.
Variables

Variables
Scopes
Global Declared outside of any function.
Local
Declared within a PHP function can only be accessed within that
function
Static
When a function is completed, all of its variables are normally
deleted. However, sometimes you want a local variable to not be
deleted. use the static keyword .
Parameter
A parameter is a local variable whose value is passed to the
function by the calling code.

Variables
Data Types
String Hello Mohamed Saad
Integer 48, -5, 160,…
Double 2.209, -1.3, 3.14,…
Boolean True or False
Date 2015-12-31 12:55:22

PHP Course Info@itBigDig.com
Athematic Operators
Operator Name Description
A + B Addition Sum of A and B
A - B Subtraction Difference of A and B
A * B Multiplication Product of A and B
A / B Division Quotient of A and B
A % B Modulus Remainder of A divided by B
A . B Concatenation Concatenate two strings

Dreamweaver
Create New Site
Dreamweaver CS 6

Dreamweaver
From Site menu Select New Site
project
Navigate to desktop and
create New Folder
Dreamweaver CS 6

Dreamweaver
Configure Your Server
Navigate to desktop and
create New Folder
Dreamweaver CS 6

Dreamweaver
Configure your server
Dreamweaver CS 6

Dreamweaver
Dreamweaver CS 6
Server name any name
FTB Address Domain
Username FTP User
Password FTP Pass
Root Folder on your
host
For this Tutorial I created a
Demo folder on my host and we
will use it along

Dreamweaver
Dreamweaver CS 6

Dreamweaver
Rename File: variables.php
Dreamweaver CS 6

PHP Tag
Open variables.php and insert basic code
<?php
?>

Copy Code
Open variables.php and insert basic code
<?php
?>
<!DOCTYPE html>
<html>
<body>
<?php
?>
</body>
</html>

PHP String Data
Output Data
<?php
echo “ ”;
?>

PHP String Data
Store & Output Data
<?php
$VariableName= „Saad‟ ;
?>

PHP String Data
Concatenation Operator
<?php
echo $first . " " . $last ;
?>

PHP String Data
Get Type Function
<?php
echo gettype($user);
?>

<?php
echo strlen($user);
?>
PHP String Data
String Length Function

<?php
echo strpos("Hello","H")
?>
PHP String Data
Search for a text

<?php
echo chr(65)
?>
PHP String Data
Character Function

Comments
Insert comments & add remarks to your code.
Single Line
• //Comments here
Multi Lines
• /*
Comments here
Comments here
*/

Dig …?
calculate the Area of square which have the
Length of 4 cm.
Print the result in
• Meter (m).
• Centimeter (Cm).
• Millimeter (mm).

Answer

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-
transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Square Area</title>
</head>
<body>
<?php
$x=1;//legnth in centimeter
echo "Length of the square =$x ";//Print out the length
$meter=$x/1000;//legnth in meter
$Ameter =$meter*$meter;//Area in meter
echo "Area of the square= $Ameter M2 ";
$Acent = $x*$x;//Area in centimeter
echo "Area of the square= $Acent Cm2 ";
$milli =$x*1000;//legnth in millimeter
$Amilli=$milli*$milli;//Area in millimeter
echo "Area of the square= $Amilli mm2";
?>
</body>
</html>
Copy Code

We hope You enjoy This Tutorial.
For any Suggestions Please email Us
Info@ITBigDig.com
End
Variables & Comments
Itbigdig.com

PHP Variables & Comments 01

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Similar to PHP Variables & Comments 01

Similar to PHP Variables & Comments 01 (20)

More from Spy Seat

More from Spy Seat (20)

Recently uploaded

Recently uploaded (20)

PHP Variables & Comments 01