Overview of PHP: History, Syntax, Advantages, and Web Applications
This technical review provides an in-depth overview of PHP, a popular server-side scripting language that is widely used for web development. It begins with an introduction to PHP, including its origins and evolution from Personal Home Page tools to PHP3 and PHP4. The review highlights what PHP can achieve, its syntax, and its advantages as a web development tool. Additionally, it covers advanced PHP functions, database connectivity, and practical examples of utilizing PHP in web applications, such as form handling and displaying browser information.
Overview of PHP: History, Syntax, Advantages, and Web Applications
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Presentation Transcript
Technical Review- PHP 20021085 Jang Jaeseok
Overview • Introduction • What is PHP? • History of PHP • What can do with PHP? • Advantages of PHP • PHP syntax • Language syntax • Web related variables • Examples
Introduction-What is PHP? • Professional HTML Processor (PHP3) • Scripting Language • Server-side, • HTML-embedded • Cross-platform (UNIX, LINUX, Windows) • APM? • Apache + PHP + MySQL • Web Server & PHP & DB
Introduction- History of PHP • Personal Home Page Tools (PHP/FI) • By Rasmus Lerdorf in 1994 • Improved Version • PHP3 • PHP4 Zend • Additional function • Improve processing speed • Popular script language • Used by about 200,000 sites
Introduction- What can do with PHP? • All functions of CGI are available (C,Perl) • Get data with HTML • Active Web page • Control cookie • Advanced functions • Active GIF image • HTTP certification • File uploading
Introduction- Advantages of PHP • Linkage to DB • MySQL, dBase, mSQL, etc. • Connect with another services • IMAP, SNMP, HTTP, POP3, etc • Raw socket • Make possible using undefined protocol • Simple coding skill • Type Automation of variable • Similarity with other language -> C++
PHP syntax- Language syntax • Embedded in HTML ( between <?, ?> ) • Variables • Type automation • Dynamic variable • Type casting • Ex) $var = (int) ”123abc”; • Control structures • If, switch, do/while, for
PHP syntax- Web related variables • GET, POST, cookie, environment variables • <FORM ACTION="test.php3" METHOD="POST"> <INPUT TYPE=text NAME=var> </FORM> • $var is set to the input of text field • PHP Information • <? • mysql_connect('localhost','',''); • phpinfo(); • ?>
Examples- Showing Browser and IP Address • <HTML> <HEAD><TITLE>PHP Example</TITLE></HEAD> <BODY> You are using <? echo $HTTP_USER_AGENT ?><BR> and coming from <? echo $REMOTE_ADDR ?> </BODY> </HTML>
Examples- Form Handling Input Result
