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WELCOME TO THE WORLD OF PHP the ultimate (Hypertext Preprocessor). Overview Definition History Uses Advantages/Disadvantages Advantages of PHP over ASP Differences between PHP and Cold-fusion Difference between JSP and PHP Basic Syntax Complex Syntax Similarities between ASP and PHP.
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WELCOME TO THE WORLD OF PHP the ultimate (Hypertext Preprocessor) Overview Definition History Uses Advantages/Disadvantages Advantages of PHP over ASP Differences between PHP and Cold-fusion Difference between JSP and PHP Basic Syntax Complex Syntax Similarities between ASP and PHP
Definition • 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
History • 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 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 Disadvantages • 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 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-Fusion 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 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 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 PHP <html> <? $var = date("H"); if ($var <= 11) { echo "good morning"; } else { if ($var > 11 and $var < 18) { echo "good afternoon"; } else { echo "good evening"; } } ?> </html>
Functions in PHP code SAMPLE CODE<? function show_form($value="") { ?> <form action="submit.php3" method="post"> <input type=text name=value value="<?echo $value?>"> <input type=submit> </form> <? }
PHP EMAIL Built-in function called mail(), that helps sends email. mail($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 with respect to ASP) <% Dim MyBody Dim MyCDONTSMail%><% Set MyCDONTSMail = CreateObject("CDONTS.NewMail") MyCDONTSMail.From= "somebody@nowhere.com" MyCDONTSMail.To= "nobody@nowhere.com" 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 PHP Similarities between PHP and ASP Positive 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.
