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2010.10.07 SLIDE 1IS 257 – Fall 2010 PHP introduction University of California, Berkeley School of Information IS 257: Database Management.

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Presentation on theme: "2010.10.07 SLIDE 1IS 257 – Fall 2010 PHP introduction University of California, Berkeley School of Information IS 257: Database Management."— Presentation transcript:

1 2010.10.07 SLIDE 1IS 257 – Fall 2010 PHP introduction University of California, Berkeley School of Information IS 257: Database Management

2 2010.10.07 SLIDE 2IS 257 – Fall 2010 Lecture Outline Review –Databases for Web Applications – Overview ColdFusion –DiveShop in ColdFusion PHP –DiveShop in PHP More on MySQL and SQL

3 2010.10.07 SLIDE 3IS 257 – Fall 2010 Lecture Outline Review –Databases for Web Applications – Overview ColdFusion –DiveShop in ColdFusion PHP –DiveShop in PHP More on MySQL and SQL

4 2010.10.07 SLIDE 4IS 257 – Fall 2010 Dynamic Web Applications 2 Server database CGI DBMS Web Server Internet Files Clients database

5 2010.10.07 SLIDE 5IS 257 – Fall 2010 Server Interfaces Adapted from John P Ashenfelter, Choosing a Database for Your Web Site DatabaseWeb Server Web Application Server Web DB App HTML JavaScript DHTML CGI Web Server API’s ColdFusion PhP Perl Java ASP SQL ODBC Native DB interfaces JDBC Native DB Interfaces

6 2010.10.07 SLIDE 6IS 257 – Fall 2010 Web Application Server Software ColdFusion PHP ASP All of the are server-side scripting languages that embed code in HTML pages

7 2010.10.07 SLIDE 7IS 257 – Fall 2010 Lecture Outline Review –Databases for Web Applications – Overview ColdFusion PHP –DiveShop in PHP Introduction to ORACLE and SQL-Plus

8 2010.10.07 SLIDE 8IS 257 – Fall 2010 Web Application Server Software ColdFusion PHP ASP All of the are server-side scripting languages that embed code in HTML pages

9 2010.10.07 SLIDE 9IS 257 – Fall 2010 ColdFusion Developing WWW sites typically involved a lot of programming to build dynamic sites –e.g. Pages generated as a result of catalog searches, etc. ColdFusion was designed to permit the construction of dynamic web sites with only minor extensions to HTML through a DBMS interface

10 2010.10.07 SLIDE 10IS 257 – Fall 2010 ColdFusion Started as CGI –Drawback, as previously discussed, is that the entire system is run for each cgi invocation Split into cooperating components –Windows service -- runs constantly –Server modules for 4 main Web Server API (glue that binds web server to ColdFusion service) {Apache, ISAPI, NSAPI, WSAPI} –Special CGI scripts for other servers

11 2010.10.07 SLIDE 11IS 257 – Fall 2010 What ColdFusion is Good for Putting up databases onto the Web Handling dynamic databases (Frequent updates, etc) Making databases searchable and updateable by users.

12 2010.10.07 SLIDE 12IS 257 – Fall 2010 Requirements Unix or Windows systems Install as SuperUser Databases must be defined via “data source names (DSNs) by administrator

13 2010.10.07 SLIDE 13IS 257 – Fall 2010 Requirements and Set Up Field names should be devoid of spaces. Use the underscore character, like new_items instead of "new items." Use key fields. Greatly reduces search time. Check permissions on the individual tables in your database and make sure that they have read-access for the username your Web server uses to log in. If your fields include large blocks of text, you'll want to include basic HTML coding within the text itself, including boldface, italics, and paragraph markers.

14 2010.10.07 SLIDE 14IS 257 – Fall 2010 Templates Assume we have a database named contents_of_my_shopping_cart.mdb -- single table called contents... Create an HTML page (uses extension.cfm), and before...

15 2010.10.07 SLIDE 15IS 257 – Fall 2010 Templates cont. SELECT * FROM contents ; Contents of My Shopping Cart Contents of My Shopping Cart #Item# #Date_of_item# $#Price#

16 2010.10.07 SLIDE 16IS 257 – Fall 2010 Templates cont. Contents of My Shopping Cart Bouncy Ball with Psychedelic Markings 12 December 1998 $0.25 Shiny Blue Widget 14 December 1998 $2.53 Large Orange Widget 14 December 1998 $3.75

17 2010.10.07 SLIDE 17IS 257 – Fall 2010 CFIF and CFELSE Item: #Item#

18 2010.10.07 SLIDE 18IS 257 – Fall 2010 More Templates INSERT INTO Employees(firstname, lastname, phoneext) VALUES(‘#firstname#’, ‘#lastname#’, ‘#phoneext#’) Employee Added Employee #firstname# #lastname# added.

19 2010.10.07 SLIDE 19IS 257 – Fall 2010 CFML ColdFusion Markup Language Read data from and update data to databases and tables Create dynamic data-driven pages Perform conditional processing Populate forms with live data Process form submissions Generate and retrieve email messages Perform HTTP and FTP function Perform credit card verification and authorization Read and write client-side cookies

20 2010.10.07 SLIDE 20IS 257 – Fall 2010 Lecture Outline Review –Databases for Web Applications – Overview ColdFusion PHP –DiveShop in PHP More on ORACLE and SQL-Plus

21 2010.10.07 SLIDE 21IS 257 – Fall 2010 PHP PHP is an Open Source Software project with many programmers working on the code. –Commonly paired with MySQL, another OSS project –Free –Both Windows and Unix support Estimated that more than 250,000 web sites use PHP as an Apache Module.

22 2010.10.07 SLIDE 22IS 257 – Fall 2010 PHP Syntax Similar to “C” or Java (note lines end with “;”) Includes most programming structures (Loops, functions, Arrays, etc.) Loads HTML form variables so that they are addressable by name <?php $myvar = “Hello World”; echo $myvar ; ?>

23 2010.10.07 SLIDE 23IS 257 – Fall 2010 Combined with MySQL DBMS interface appears as a set of functions: <?php mysql_connect(“localhost”, “usename”, “password”); mysql_select_db(“mydb”); $result = mysql_query(“SELECT * FROM employees”); while ($r = mysql_fetch_array($result,MYSQL_ASSOC)) { printf(" %s",$r[”LAST_NAME"]); printf(”, %s ",$r[”FIRST_NAME"]); } ?>

24 2010.10.07 SLIDE 24IS 257 – Fall 2010 Diveshop PHP Examples on Harbinger/People…

25 2010.10.07 SLIDE 25IS 257 – Fall 2010 ASP – Active Server Pages Another server-side scripting language From Microsoft using Visual Basic as the Language model (VBScript), though Javascript (actually MS Jscript) is also supported Works with Microsoft IIS and gives access to ODBC databases Most commonly used for Access or MS SQL Server

26 2010.10.07 SLIDE 26IS 257 – Fall 2010 ASP Syntax <% SQL="SELECT last, first FROM employees ORDER BY last" set conn = server.createobject("ADODB.Connection") conn.open “employee" set people=conn.execute(SQL) %> <% do while not people.eof set resultline=people(0) & “, “ & people(1) & “ ” Response.Write(resultline) people.movenext loop%>

27 2010.10.07 SLIDE 27IS 257 – Fall 2010 Lecture Outline Review –Databases for Web Applications – Overview ColdFusion –DiveShop in ColdFusion PHP –DiveShop in PHP More on MySQL and SQL

28 2010.10.07 SLIDE 28IS 257 – Fall 2010 Today More on SQL for data manipulation and modification

29 2010.10.07 SLIDE 29IS 257 – Fall 2010 SELECT Syntax: –SELECT [DISTINCT] attr1, attr2,…, attr3 as label, function(xxx), calculation, attr5, attr6 FROM relname1 r1, relname2 r2,… rel3 r3 WHERE condition1 {AND | OR} condition2 ORDER BY attr1 [DESC], attr3 [DESC]

30 2010.10.07 SLIDE 30IS 257 – Fall 2010 SELECT Conditions = equal to a particular value >= greater than or equal to a particular value > greater than a particular value <= less than or equal to a particular value <> or != not equal to a particular value LIKE ‘%wom_n%’ (Note different wild card from Access) opt1 SOUNDS LIKE opt2 IN (‘opt1’, ‘opt2’,…,’optn’) BETWEEN opt1 AND opt2 IS NULL or IS NOT NULL

31 2010.10.07 SLIDE 31IS 257 – Fall 2010 Aggregate (group by) Functions COUNT(dataitem) COUNT(DISTINCT expr) AVG(numbercolumn) SUM(numbercolumn) MAX(numbercolumn) MIN(numbercolumn) STDDEV(numbercolumn) VARIANCE(numbercolumn) and other variants of these…

32 2010.10.07 SLIDE 32IS 257 – Fall 2010 Numeric Functions ABS(n) ACOS(n) ASIN(n) ATAN(n) ATAN2(n, m) CEIL(n) COS(n) COSH(n) CONV(n, f- base,t-base) COT(n) ROUND(n) SIGN(n) SIN(n) SINH(n) SQRT(n) TAN(n) TANH(n) TRUNCATE( n,m) DEGREES(n) EXP(n) FLOOR(n) LN(n) LOG(n,b) MOD(n) PI() POWER(n,p)

33 2010.10.07 SLIDE 33IS 257 – Fall 2010 Character Functions returning character values CHAR(n,…) CONCAT(str1,str2,…) LOWER(char) LPAD(char, n,char2), RPAD(char, n,char2) LTRIM(char, n, cset), RTRIM(char, n, cset) REPLACE(char, srch, repl) SOUNDEX(char) SUBSTR(char, m, n) UPPER(char)

34 2010.10.07 SLIDE 34IS 257 – Fall 2010 Character Function returning numeric values ASCII(char) INSTR(char1, char2) LENGTH(char) BIT_LENGTH(str) CHAR_LENGTH(str) LOCATE(substr,str) LOCATE(substr,str,po s) and many other variants.

35 2010.10.07 SLIDE 35IS 257 – Fall 2010 Date functions ADDDATE(dt, INTERVAL expr unit) or ADDDATE(dt, days) ADDTIME(dttm, time) LAST_DAY(dt) MONTH(dt) – YEAR(dt) – DAY(dt) MONTHNAME(dt) NOW() NEW_TIME(d, z1, z2) -- PST, AST, etc. NEXT_DAY(d, dayname) STR_TO_DATE(str,format) SYSDATE()

36 2010.10.07 SLIDE 36IS 257 – Fall 2010 Assignment 3 Assignment 3 is some additional (and occasionally more complex) searches to be run on the Diveshop database These should be run via the command line (via login to ischool.berkeley.edu) Assignment 3 is posted on the class web site Walkthrough online version Due Tuesday, Oct. 25th

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