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1. PHP Basic
Mandakini Kumari
22 July 2012
nd
http://www.slideshare.net/mandakinikumari
Mandakini
Ayushi Infotech

2. Overview
A Brief History
What is PHP
Why PHP
PHP Stack
PHP Syntax
Variables
PHP String
PHP Operators

3. Overview
PHP Arrays
PHP If...Else
PHP Switch
PHP While
For Loop
Foreach
Function
Form,Get,Post

4. Overview
Object
Database Connection
Database Query
Sessions & Cookies

5. A brief history
• Created by Rasmus Lerdorf in 1995
• PHP: Hypertext Preprocessor
• PHP interpreters available on 32-bit
and 64-bit operating systems

6. What is PHP
• Similar Syntax as C or Perl
• PHP stands for PHP: Hypertext Preprocessor
• PHP files have a file extension of ".php", ".php3",
or ".phtml"
• PHP is a server-side scripting language, like ASP
• PHP scripts are executed on the server
• PHP supports many databases (MySQL, Informix,
Oracle, Sybase, Solid, PostgreSQL, Generic
ODBC, etc.)
• PHP is an open source software

7. Why PHP
• PHP runs on different platforms (Windows,
Linux, Unix, etc.)
• PHP is compatible with almost all servers used
today (Apache, IIS, etc.)
• PHP is FREE to download from the official PHP
resource: www.php.net
• PHP is easy to learn and runs efficiently on the
server side

8. The Stack
• Apache (lighttpd, IIS)
• MySQL (PostgresSQL, SQL Server,
Oracle)
• PHP
• PHPMyAdmin for adminisering your
SQL Database
• Linux (BSD, Mac OS, Windows,
Solaris)

9. The Stack

10. Syntax
<?php
echo "Hello World";
?>

11. PHP Variables
<?php
$txt="Hello World!";
$x=16;
?>

12. PHP Variable Types

Local

Global

Static

Parameter

13. PHP Global Variable
$a = 5; $b = 10;
function myTest()
{
global $a, $b;
$b = $a + $b;
}
myTest();
echo $b;

14. PHP Local Variable
$a = 5; // global scope
function myTest()
{
echo $a; // local scope
}
myTest();

15. PHP Static & Parameters
static $rememberMe;
function
myTest($para1,$para2)
{
}

16. Operators
x + y Addition Sum of x and y 2+2 4
x-y Subtraction Difference of x and y 5-2 3
x * y Multiplication Product of x and y 5 * 2 10
x/y Division Quotient of x and y 15 / 5 3
x % y Modulus Remainder of x divided by y 5%2
- x Negation Opposite of x -2
a.b Concatenation Concatenate two strings "Hi" . "Ha" HiHa
x && y And True if both x and y are true
x || y Or True if either or both x and y are true

17. PHP Array
$cars=array("Saab","BMW","Toyota");
$ages = array("ass1"=>32, "associative2"=>30);
$cars[0]="Saab";
$cars[2]="BMW";
$cars[3]="Toyota";
echo $cars[0] . " and " . $cars[1];

18. If else Statement
if (condition)
{
code to be executed if condition is true;
}
else
{
code to be executed if condition is false;
}

19. Switch Statement
$x=1;
switch ($x)
{
case 1:
echo "Test Number 1";
break;
case 2:
echo "Test Number 2";
break;
default:
echo "No test number between 1 and 2"; }

20. While Statement
$i=1;
while($i<=5)
{
echo "This number is " . $i . "<br />";
$i++;
}

21. For Loop
for ($i=1; $i<=5; $i++)
{
echo "The number is " . $i .
"<br />";
}

22. Foreach Loop
$x=array("one","two","three");
foreach ($x as $value)
{
echo $value . "<br />";
}

23. Function
<?php
function add($x,$y)
{
$total=$x+$y;
return $total;
}
echo "1 + 16 = " . add(1,16);
?>

24. HTML Form
<form action="welcome.php"
method="post">
Name: <input type="text"
name="fname" />
Age: <input type="text" name="age" />
<input type="submit" />
</form>

25. GET & POST
Welcome <?php echo $_POST["fname"]; ?>
You are <?php echo $_POST["age"]; ?> years old.
OR
http://example.com/test.php?fname=Peter&age=37
Welcome <?php echo $_GET["fname"]; ?>.<br />
You are <?php echo $_GET["age"]; ?> years old!

26. Mysql Connection
$con =
mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("my_db", $con);
mysql_close($con);

27. Mysql Query
$sql="INSERT INTO Persons (FirstName, Age)
VALUES
('$_POST[fname], '$_POST[age]')";
mysql_query($sql);
Select * FROM Persons
Update/Delete

28. Session & Cookie
session_start();
if(isset($_SESSION['views']))
unset($_SESSION['views]);
session_destroy();
setcookie(name,value,expire,domain,path,domain,secure,http
only);
setcookie("TestCookie", $value, time()
+3600, "/~rasmus/", "example.com", 1);

29. Thank you
Contact me @
http://www.linkedin.com/pub/mandakini-kumari/18/93/935
https://www.facebook.com/mandakini.kumari