PHP: A Comprehensive Introduction to this Widely-Used Web Development Language, Study notes of C programming

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Brief Introduction

of PHP

---Xue Wu

PHP (Personal Home Page)

 Web development

1. can be embedded into HTML
2. generally runs on a web server
3. Act as a filter: (from PHP 4, performance improved by complied input as bytecode)
4. widely used and free charge

PHP--- example

 Grammatical: ---Can be both embedded into HTML and separated from HTML code:

(XML passers ) <%... %>

PHP---Usage

 Competitor: Microsoft’s Active Server Page Sun Microsystems’ Java Server Page Mode_perl  Rapid Application Development (RAD) Cake PHP, PRADO, Symfony, Codelgniter

PHP--- Interaction with THML:

 echo Can output multiple strings: <? $a="hello"; $b="world"; echo "a","b"; ?> ---result: hello world  Print Can only output single string: <? $a="hello"; $b="world"; print "a","b"; ?> ---Parse error: parse error in d:adminmyphphometest.p hp3 on line 54

PHP---Security

 To prevent from damaging on your website

1. Error Report
2. SQL Injections
3. Cross Site Scripting
4. Session Security

Reference

 http://en.wikipedia.org/wiki/PHP last retrieved on 2009-2-  http://www.phpchina.com/?action_thematici nfoview_itemid_34132.html “PHP tutorial”, last retrieved on 2009-2-  http://www.phpfreaks.com/tutorial/php- security/page9 “PHP Security”, last retrieved on 2009-3-