WELCOME TO THE WORLD OF PHP the ultimate (Hypertext Preprocessor)

WELCOME TO THE WORLD OF PHP the ultimate (Hypertext WELCOME TO THE WORLD OF PHP the ultimate (Hypertext Preprocessor)Preprocessor)

OverviewDefinitionHistoryUsesAdvantages/DisadvantagesAdvantages of PHP over ASPDifferences between PHP and Cold-fusionDifference between JSP and PHPBasic SyntaxComplex SyntaxSimilarities between ASP and PHP

DefinitionDefinition

Programming Language Server-side scripting language Html Embedded Scripting Language

primary purpose of which to generate HTML

It focuses on the logic of how a page responds to user input, not how the page looks

HistoryHistory

PHP is a language for creating interactive web sites over 3.3 million web sites around the world. Originally name: "Personal Home Page Tools" when it was created in

1994 by Rasmus Lerdorf to keep track of who was looking at his online resume

Uses of PHPUses of PHP

Helps in reading and writing files Can do basic file and directory maintenance Take content, use in generation of files in various formats i.e. HTML

and PDF Manages graphic content Read, write info in database.

Advantages of PHP and Advantages of PHP and DisadvantagesDisadvantages

Cost –free Cross-platform compatibility (Windows, Macintosh, or a version of

Unix, ): Compiled and built on 25 platforms

Error handling is not as sophisticated as ASP

Advantages of PHP over ASPAdvantages of PHP over ASP

PHP runs faster than ASP PHP is Free . PHP is more efficient with memory PHP can be run on any system with no performance issues PHP is tightly integrated with MySQL ASP commonly uses Microsoft

Access which is much slower than MySQL More object oriented than ASP Database connections in PHP > 200% (higher)

Differences between PHP and Cold-Differences between PHP and Cold-FusionFusion

Cold-Fusion: Web application development tool that allows developers to build dynamic data-driven applications for use

on the Internet and intranets

Cold Fusion PHP (Platform) Relatively limited platform selection. If compiled, runs

ieWindows, Solaris, Linux or HP/UX. (Language) Really fast and easy for display pages and database interaction Not as easy for the easy stuff, but

much easier for the hard stuff. (Database Support):Abstracts database connections, making them simple to use, Has extremely strong native DB

support

(File System Support):Adequate file support, but is quirky and not feature-rich Comprehensive file system

support (Error-handling):good try/catch functionality, making formal error handling possible has no formal error handling

Basic/General SyntaxBasic/General Syntax

<?php ... ?>

<html><head><title>My first PHP page</title></head><body>This is normal HTML code<?php

// PHP code goes here?>Back into normal HTML</body></html>

Variables in PHPVariables in PHP loosely “typed language” i.e given variable can be an integer, floating-point number, string,

object, or an array

Integer: mathematical data type and represents any whole number and usually can be any value from a negative value to a positive value.

floating-point number represents any value that contains a decimal point.

EXAMPLE OF AN INTEGER VARIABLE

<?php

// All of the following are numerically equivalent

$myint = 83;// Normal decimal notation

$myint = O123; // Octal notation for the # 83

$myint = 0x53; // Hexadecimal notation for # 83

?>

EXAMPLE OF AN INTEGER VARIABLE

<?php

// Both of the following are equivalent to 1.234

$myfloat = 1.234; // Standard decimal notation

$myfloat = .001234e3; // Scientific notation ?>

Condition-code in PHPCondition-code in PHP

<html><?$var = date("H");if ($var <= 11) { echo "good morning";}else { if ($var > 11 and $var < 18) { echo "good afternoon"; } else { echo "good evening"; }}?></html>

Functions in PHP codeFunctions in PHP code

SAMPLE CODE<? function show_form($value="") { ?>

<form action="submit.php3" method="post">

<input type=text name=value

value="<?echo $value?>">

<input type=submit>

</form>

<? }

PHP EMAILPHP EMAIL

Built-in function called mail(), that helps sends email.

mail($receiver, $subject,

$message, "From: $sender");

NOTE: The mail() function

-return a variable

-true or false, with regard to whether the mail was sent

- echo information to your user, as to the email status.

$sent = mail($receiver, $subject, $message, "From: $sender");

if ($sent) {

echo "your message was sent";

}else {

echo "your message was not sent";

}

ASP EMAIL CODE(An idea ASP EMAIL CODE(An idea with respect to ASP)with respect to ASP)

<% Dim MyBody Dim MyCDONTSMail%>

<% Set MyCDONTSMail = CreateObject("CDONTS.NewMail") MyCDONTSMail.From= "[email protected]" MyCDONTSMail.To= "[email protected]" MyCDONTSMail.Subject="This is a Test" MyBody = "Thank you for ordering that stuff" & vbCrLf MyBody = MyBody & "We appretiate your business" & vbCrLf MyBody = MyBody & "Your stuff will arrive within 7 business days" MyCDONTSMail.Body= MyBody MyCDONTSMail.Send set MyCDONTSMail=nothing%>

Similaritites betweeen ASP and Similaritites betweeen ASP and PHPPHP

Similarities between PHP and ASPPositive Aspect Easy to develop. Easy database connection/configuration.

The presentation is separate from processing.

Negative Aspects They are scripting languages that has a narrow scope.

They are scalability.

Differences between JSP and PHPDifferences between JSP and PHP

JSP PHP

JSP uses Java as its scripting language defines its own scripting language, which looks and feels a lot like Perl. Uses VBScript

JSP is much more powerful, since it has access to all the Java libraries

access to PHP libraries

Object-Oriented, so leads to cleaner code that's easier to debug, maintain, and improve.

Also allows objects, but the object model is more primitive, and most scripted pages ignore PHP objects and just use normal variables.

WELCOME TO THE WORLD OF PHP the ultimate (Hypertext Preprocessor)

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