php variables & comments 01
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PHP CoursePHP 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 Info@ITBigDig.com
PHP Course1: Variables & Comments
PHP Course Info@ITBigDig.com
Naming Rules
PHP Course Info@ITBigDig.com
• $ 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
VariablesScopes
PHP Course Info@ITBigDig.com
Global Declared outside of any function.
LocalDeclared 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 .
Paramet
er
A parameter is a local variable whose value is passed to
the function by the calling code.
VariablesData Types
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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
PHP Course Info@itBigDig.com
Dreamweaver C
S 6
Dreamweaver From Site menu Select New Site
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project
Navigate to desktop and create New Folder
Dreamweaver C
S 6
Dreamweaver Configure Your Server
PHP Course Info@itBigDig.com
Navigate to desktop and create New Folder
Dreamweaver C
S 6
Dreamweaver Configure Your Server
PHP Course Info@itBigDig.com
Configure your server
Dreamweaver C
S 6
Dreamweaver Configure Your Server
Dreamweaver C
S 6
PHP Course Info@itBigDig.com
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 Configure Your Server
Dreamweaver C
S 6
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Dreamweaver Rename File: variables.php
Dreamweaver C
S 6
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PHP Tag Open variables.php and insert basic code
<?php
?>
PHP Course Info@itBigDig.com
Copy Code Open variables.php and insert basic code
<?php
?>
PHP Course Info@itBigDig.com
<!DOCTYPE html><html>
<body><?php
?>
</body></html>
PHP String Data Output Data
<?php
echo “ ”;
?>
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PHP String Data Store & Output Data
<?php
$VariableName= ‘Saad’ ;
?>
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PHP String DataConcatenation Operator
<?php
echo $first . " " . $last ;
?>
PHP Course Info@itBigDig.com
PHP String DataGet Type Function
<?php
echo gettype($user);
?>
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<?php
echo strlen($user);
?>
PHP Course Info@itBigDig.com
PHP String DataString Length Function
<?php
echo strpos("Hello","H")
?>
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PHP String DataSearch for a text
<?php
echo chr(65)
?>
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PHP String DataCharacter Function
<?php
echo chr(65)
?>
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PHP String DataCharacter Function
CommentsInsert comments & add remarks to your code.
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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).
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mm• *1000
Cm• *1000
M• *1000 KM
Answer
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<!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
$x=1;//legnth in centimeterecho "Length of the square =$x <br/>";//Print out the length
$meter=$x/1000;//legnth in meter$Ameter =$meter*$meter;//Area in meterecho "Area of the square= $Ameter M<sup>2</sup> <br/>";
$Acent = $x*$x;//Area in centimeterecho "Area of the square= $Acent Cm<sup>2</sup> <br/>";
$milli =$x*1000;//legnth in millimeter$Amilli=$milli*$milli;//Area in millimeterecho "Area of the square= $Amilli mm<sup>2</sup>";
?></body></html>
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Copy Code
We hope You enjoy This Tutorial.
For any Suggestions Please email Us
Info@ITBigDig.com
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EndVariables & Comments
Itbigdig.com
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