introduction to php/ mysql i
DESCRIPTION
INTRODUCTION TO PHP/ mySQL I. FTSM Lab / May 2011. Goal. Provide the basic knowledge of PHP programming Explain how you can code and run PHP scripts Creating dynamic pages Basic database interactions – read, insert, update and delete data Basic session management PHP Application packages. - PowerPoint PPT PresentationTRANSCRIPT
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INTRODUCTION TO PHP/MYSQL I
FTSM Lab / May 2011
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Goal Provide the basic knowledge of PHP
programming Explain how you can code and run PHP
scripts Creating dynamic pages Basic database interactions – read, insert,
update and delete data Basic session management PHP Application packages
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StructureHTML/XHTML
CSS
JavaScript
DatabasePHP
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HTML/JavaScript/CSS http://www.w3schools.com HTML, JavaScript and CSS tutorials
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Client-server architecture
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What is PHP? PHP = ‘Hypertext PreProcessor’ Originally created by Rasmus
Lerdorf in 1994 The main implementation of PHP
is now produced by The PHP Group (de facto standard for PHP) - http://www.php.net/
Open-source (access to source code and free distribution right), server-side scripting language
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How PHP works
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PHP on Windows
Method1
IIS
FastCGI + PHP
mySQL
Method2
Apache
PHP
mySQL
Method3WAMP
Packages
Method4
Web Hosting
How to run PHP scripts
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Webhosting Webhosting information
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WAMP Packages - XAMPP http://www.apachefriends.org/en/
index.html
Version for Windows includes: Apache, MySQL, PHP, Perl, phpMyAdmin, JpGraph, FileZilla FTP Server, SQLite etc.
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WAMP Packages - WAMPServer http://www.wampserver.com/en/
Version for Windows includes: Apache, PHP, Mysql (version 64 and 32 bits), PhpMyadmin, SQLBuddy, XDebug, webGrind, XDC
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Basic syntaxes, data types, variable, control structures, arrays, function
PHP Scripts
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PHPVARIABLESBASIC
SYNTAX DATA TYPE
FUNCTIONCONTROL STATEMEN
TSDATABASE
CONNECT/ READ INSERT UPDAT
EDELET
E
SESSION PHP PACKAGES
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PHP code Structurally similar to C/C++ All PHP statements end with a semi-colon Each PHP script must be enclosed in the
reserved PHP tag<?php……?>
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PHP code - comments Standard C, C++, and shell comment
symbols// C++ and Java-style comment
# Shell-style comments
/* C-style comments These can span multiple lines */
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PHP code - output
<?php$nilai = 25; // Numerical variable$ayat = “Hello”; // String variable
echo $ayat; // Outputs Helloecho $nilai, $ayat; // Outputs 25Helloecho “5x5=”,$nilai; // Outputs 5x5=25echo “5x5=$nilai”; // Outputs 5x5=25echo ‘5x5=$nilai’; // Outputs 5x5=$nilai?>
Use ‘echo’ or ‘print’ Strings in single quotes (‘ ’) are not
interpreted or evaluated by PHP
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If the string has a set of double quotation marks that must remain visible, use the \ [backslash] before the quotation marks to ignore and display them.<?php
$jab=“\”PHP\””;
print $jab; //”PHP”
?>
PHP – escape character
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PHP code - variables PHP variables must begin with a “$” sign Case-sensitive ($var != $VAR != $vAr) Global and locally-scoped variables
Global variables can be used anywhere Local variables restricted to a function or
class Certain variable names reserved by PHP
Form variables ($_POST, $_GET) Server variables ($_SERVER)
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PHP code – variables<?php
$nilai = 25; //Numerical variable$ayat = “Hello”; //String variable
$nilai = ($nilai * 7); //Multiplies variable nilai by 7
?>
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PHP code - operations<?php
$a=30;$b=5;$total=$a+$b;print $total; //35print “<p>Jumlah ialah $total</p>”;
// Jumlah ialah 35
print $a-$b; //25print $a*$b; //150print $a/$b; //6print $a+=$b; //35print $a%$b; //0
?>
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Use a period to join strings into one.<?php
$string1=“Hello”;$string2=“PHP”;
$string3=$string1 . “ ” . $string2;
print $string3; //Hello PHP
?>
PHP code – strings function
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PHP – Control Statements Control structures similar with
JavaScript/C++ if, elseif, else switch, case while for foreach
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PHP - if, elseif, else
<?php
$markah = 90;
if ($markah >= 80)echo “Lulus dengan cemerlang";
elseif ($markah >= 40) echo “Lulus";else echo “Gagal";
?>
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PHP control – switch
…switch ($jantina){
case “L”: echo “Lelaki"; break;
case “P”: echo “Perempuan"; break;
default: echo “Tiada input jantina";
}…
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PHP control – while loops
<?php
$nombor = 1;
while ($nombor!=10){print “Bilangan $nombor”;$nombor++;}
?>
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PHP control – for loops
<?php
for ($n = 1; $n<=10; $n++){print “Bilangan $n”;}
?>
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PHP control – foreach loops<?php
$numbers = array("one","two","three");
foreach ($numbers as $value) {echo $value . "<br />";
}
?>
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PHP arrays Three kind of arrays:
Numeric array - An array with a numeric index
Associative array - An array where each ID key is associated with a value
Multidimensional array - An array containing one or more arrays
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PHP – numeric arrays
<?php
//numeric array$cars = array("Saab","Volvo","BMW",“Ford");
echo $cars[2]; //BMW
?>
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PHP – associative arrays
<?php
//associative array
$umur = array ("Raju"=>32, "Gopal"=>34, "Samy" => 36); //same as $umur[‘Raju’]=32…
echo $umur[‘Gopal’]; //34
?>
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PHP - multi dimensional arrays<?php
//multidimensional array
$kump = array ("Merah"=> array ("Ali", "Raju", "Joan"), "Biru"=> array ("Abu", "Jason", "Lin"), "Hijau" => array ("David", "Jim", "Mary");
echo $kump [‘Merah’][2]; //Joanecho $kump [‘Hijau’][0]; //David
?>
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PHP array functions array_push() – adds element/s to an array
<?php
$a=array("Dog","Cat");array_push($a,"Horse","Bird");print_r($a);
/*Array ([0]=>Dog [1]=>Cat [2]=>Horse [3]=>Bird) */
?>
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PHP array functions array_pop() – deletes last element in an array
<?php
$a=array("Dog","Cat","Horse");array_pop($a);print_r($a);
// Array ([0]=>Dog [1]=>Cat)
?>
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PHP array functions unset() – destroy a variable$array = array(0, 1, 2, 3);unset($array[2]);
/* array(3) { [0]=>int(0)
[1]=>int(1) [3]=>int(3)} */
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Functions MUST be defined before they can be called
Function headers are of the format
function function_name ($var1, $var2…){
…}
Function names are not case sensitive
PHP - functions
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<?php// This is a functionfunction darab($arg1, $arg2){
$arg3 = $arg1 * $arg2;return $arg3;}
echo darab(12,3); // 36?>
PHP - functions
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PHP - Using external files Using external files for:
HTML codes Structure – template files like headers, footers Functions – separate file to store all functions Config – separate configurationsettings in different file
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PHP – include and require Four functions:
include() include_once() require() require_once()
Generates warnings when the function doesn’t work
Generates errors and halts scripts when the function doesn’t work
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Using “include” to include external files<?phpinclude “header.php”Include “tarikh.php”include “menubar.php”…?>
<?phpprint “Tarikh hari ini ialah $date2”;
?>
PHP - include
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PHP References• http://www.php.net <- php home page• http://www.php.net/downloads <- php
download page• http://www.php.net/manual/en/install.wind
ows.php <- php installation manual
• http://www.w3schools.com/php/default.asp <-php online tutorial
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SQL, MySQL, phpMyAdmin, creating database and tables
Database and SQL
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SQL SQL – Structured Query Language SQL can be used to access and
manipulate databases
SELECT * FROM pelajar
SELECT * FROM pelajarWHERE NoMatrik=‘A123456’
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SQL Queries Query database for specific information
and have a recordset returned from table
SELECT nama FROM pelajar
namaJalil
GopalAh Meng
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SQL Keywords SELECT – select from tables FROM – specifies tables WHERE – specifies criteria
INSERT – inserts data into table UPDATE – updates data in table DELETE – deletes data in table
CREATE – create new table DROP – delete existing table
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SQL Keywords UsageSELECT * FROM pelajarOutput: select all columns from table pelajar
SELECT nama, nomatrik FROM pelajarOutput: select columns nama and nomatrik from table
pelajar
SELECT nama, nomatrik FROM pelajarWHERE nomatrik=‘A12345’Output: select columns nama, nomatrik from table
pelajar where row nomatrik equals ‘A12345’
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SQL Keywords UsageINSERT INTO pelajar (nomatrik, nama,
jabatan, kumpulan)VALUES (‘A12365’, ‘Hashim’, ‘4’, ‘9’) Action: insert specified value to table pelajar,
creating new row
DELETE FROM pelajarWHERE nomatrik=‘A12369’Action: select row from table pelajar where
nomatrik as specified and delete the row
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SQL Keywords UsageUPDATE pelajar SET nama = ‘Hisham’WHERE nama = ‘Hashim’ AND
nomatrik = ‘A12365’Action: update specified row to table
pelajar
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MySQL MySQL - "My Structured Query Language“
Created by Michael Widenius from TcX (Sweden) in 1994
Open-source, relational database management system
MySQL is used in web applications and acts as the database component of the WAMP/LAMP
Used in free software projects (e.g. WordPress, Joomla)
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MySQL and WAMP/LAMP Download at www.mysql.com
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MySQL Interfaces Interfaces to manage and browse
database easily phpMyAdmin heidiSQL MySQL-Front SQLyog
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phpMyAdmin
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Creating DatabaseCREATE DATABASE databasename
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Creating Tables Some of MySQL data types:
Type DescriptionCHAR [length]
Fixed-length, 0 to 255 characters long
VARCHAR [length]
Variable-length, 0 to 255 characters long
TEXT String, maximum 65,535 characters
INT [length] -2.147 millions to 2,147 millions
DATE YYYY-MM-DD formatTIME HH:MM:SS
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Creating Tables1. Choose a suitable name and create
table2. Identify columns names3. Identify data types4. Identify suitable MySQL data type5. Identify suitable length
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Creating Tables Creating table for a guestbook
application
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Creating Tables Identifying column general data type
Column name
Type
ID NumberNAMA TextEMAIL TextTARIKH Date/timeKOMEN Text
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Table: guestbookColumn name
Type MySQL data type
ID Number INTNAMA Text VARCHAR [40]EMAIL Text VARCHAR [40]TARIKH Date/time DATETIMEKOMEN Text TEXT
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guestbookID NAMA EMAIL TARIKH KOMEN1 Simon simon@yahoo.
com2010-09-
21 07:40:48
Excellent website! Well done!
2 Azizi [email protected]
2010-09-23
10:20:48
Sila lawati laman web saya:
azizi.com.my3 Wei
.uk2010-09-
23 10:45:12
Still waiting for the updates :D
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Read, insert, update and delete data using PHP
PHP and MySQL
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DELETE DATACREATE
CONNECTION
CLOSE CONNECTION
INSERT DATA
READ DATA
UPDATE DATA
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PHP Creating & Closing Connection Use mysql_connect() and mysql_close()
$con = mysql_connect (servername, username, password);
if (!$con) {die('Could not connect: ' . mysql_error());}
…mysql_close($con);
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PHP Selecting Database Use mysql_select_db()
…$con = mysql_connect (servername, username, password);
mysql_select_db (databasename, $con);…
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PHP Displaying data Use mysql_query() to run SQL The return result are usually in array
form$result = mysql_query ("SELECT * FROM guestbook");
while($row = mysql_fetch_array ($result)) {echo $row[‘NAMA'] . “-" . $row[‘EMAIL'] .
”-” . row[‘TARIKH'] . “-" . $row[‘KOMEN']; }
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PHP Inserting data
…//run querymysql_query("INSERT INTO guestbook(ID, NAMA, EMAIL, TARIKH, KOMEN) VALUES (5, ‘Jason', ‘[email protected]‘, NOW(), ‘Website yang bagus!’)");…
Use mysql_query()
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PHP Inserting data
//Create query$qry = "INSERT INTO guestbook (ID, NAMA, EMAIL, TARIKH, KOMEN) VALUES (5, ‘Jason', ‘[email protected]‘, NOW(), ‘Website yang bagus!’)”;
//Run querymysql_query($qry);…
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PHP Inserting data from Form
HTML FORM PHP
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PHP Inserting data from Form
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PHP Inserting data from Form
… $sql="INSERT INTO guestbook (NAMA, EMAIL, TARIKH, KOMEN)VALUES ('$_POST[nama]', '$_POST[email]‘, '$_POST[tarikh]‘, '$_POST[komen]')";…
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PHP Displaying data in table
…echo "<table>"; while($row = mysql_fetch_array($result)) {
echo "<tr>";echo "<td>" . $row[‘NAMA'] . "</td>";echo "<td>" . $row[‘EMAIL'] . "</td>";echo "<td>" . $row[‘TARIKH'] . "</td>";echo "<td>" . $row[‘KOMEN'] . "</td>";echo "</tr>"; }
echo "</table>"; …
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PHP Updating data Use UPDATE /SET /WHERE to update data
mysql_query (“UPDATE guestbook SET EMAIL = ‘[email protected]’ WHERE NAMA = ‘Simon‘ "); }
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PHP Deleting data Use DELETE FROM /WHERE to delete
data from database…mysql_query (“DELETE FROM guestbook WHERE Nama = ‘Simon‘ ");…
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Update/Delete in Form Modify display table form to incorporate
update/delete functions//make a link at the end of each table row for UPDATE and DELETE…echo “<td>”;echo "<a href='delete.php?cmd=delete&id=$id‘>Delete</a>"; echo “</td><td>”;echo "<a href=‘update.php?&id=$id‘>Delete</a>"; echo "<br>";
if($_GET["cmd"]=="delete") {…}
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HTTP Requests GET
Gets/retrieves information from server (e.g retrieve an image, fetch search results)
Sends information as part of URL (visible, 2048 chars limit)
Cached, bookmark-able POST
Posts/sends data (e.g login information, post form data)
Submitted data is hidden (invisible) Non-cached, non-bookmark-able
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Update ProcessSelect data by primary key using SQL SELECT
Show data in HTML form to modify elements
Use SQL UPDATE to update data
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User sessions
PHP Session Management
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Sessions Using session identifier in server to
locate and store user data Advantage over cookies:
More secure – all data stored in server Not browser/computer dependent – some
users reject cookies/turn off Store more data than cookie
Use session_start() and $_SESSION[variable]
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Sessions
…//login processsession_start();$_SESSION[‘user_id’] = A11201;…
…session_start();If (isset($_SESSION[‘user_id’])){…
…//reset session array$_SESSION = array();//delete sessionsession_destroy();…
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Installing packages, customizing packages
PHP Application Packages
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PHP packages Useful and easy to install PHP
applications Phpmyadmin Joomla modx phpBB Wordpress Mediawiki zend
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phpMyadmin MySQL interface Deployment:
Download from site Unzip to web document root
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Joomla Multi-user CMS Deployment:
Download and unzip inweb document root Launch install script
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modx Multi-user CMS
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phpBB Bulletin board
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Wordpress Blogging application -
http://www.wordpress.org
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MediaWiki Wiki -
http://www.mediawiki.org/wiki/MediaWiki
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Zend http://framework.zend.com
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THANK YOU