PHP 1

PHP (BASIC)

First session

INDEX

• Into • Do … while loop
• Syntax • While loop
• Variables • For loop
• String • Functions
• Operators • Form
• If else • $_POST
• Switch • $_GET
• Array • $_REQUEST

INTRO • What is PHP?

• What is MySQL?

• Why PHP?

PHP SYNTAX • Extension
• First file name
• Where shall we save the project
• <?php ?>

• <html><body>
• <?php echo "Hello World"; ?>
• </body></html>

• Comments in PHP

VARIABLES • Creating (Declaring) PHP Variables
• $myName=“Doksh";
• PHP has four different variable scopes:

• local
• global
• static
• parameter

LOCAL • <?php
• $a = 5; // global scope

• function myTest()
• {
• echo $a; // local scope
• }

• myTest();
• ?>

GLOBAL • <?php
• $a = 5;
• $b = 10;

• function myProject()
• {
• global $a, $b;
• $b = $a + $b;
• }

• myProject();
• echo $b;
• ?>

STATIC SCOPE • static $rememberMe;

AND • function myTest($a1,$a2,...)
PARAMETERS
• {
• // function code
• }

STRING • <?php
VARIABLES IN • $txt="Hello World";
PHP • echo $txt;
• ?>

• concatenation operator

• echo $txt1 . " " . $txt2;

STRLEN() • <?php
FUNCTION • echo strlen("Hello world!");
& • ?>
STRPOS()
______________________________
FUNCTION

<?php
echo strpos("Hello world!","world");
?>

OPERATORS • +
• -
• *
• /
• %
• -m
• M.m
• X=y
• X +=y …. etc
• ++x per
• X++ post
• X == y, X != y
• X === y, X !== y
• X >= y, X >y
• X && y
• X y

IF & DATE • <html>
• <body>

• <?php
• $d=date("D");
• if ($d=="Fri")
• {
• echo “WOW";
• }
• elseif ($d=="Sun")
• {
• echo “OK OK OK OK";
• }
• else
• {
• echo “ohhhh!";
• }
• ?>

• </body>
• </html>

SWITCH • <html>
• <body>

• <?php
• $x=1;
• switch ($x)
• {
• case 1:
• echo "Number 1";
• break;
• case 2:
• break;
• case 3:
• break;
• default:
• echo "No number ";
• }
• ?>

• </body>

ARRAY • $Name=array(“Moha",“Tom",“Totti",“
Nona");

• <?php
• $Name[0]=“Moha";
• $Name[1]=“Tom";
• $Name[2]=“Totti";
• $Name[3]=“Nona";
• echo $Name[0] . " and " . $ Name[1];
• ?>

WHILE • <html>
• <body>

• <?php
• $i=1;
• while($i<=5)
• {
• echo "The number is " . $i . "<br />";
• $i++;
• }
• ?>

• </body>
• </html>

DO WHILE • <html>
• <body>

• <?php
• $i=1;
• do
• {
• $i++;
• }
• while ($i<=5);
• ?>

• </body>
• </html

FOR • <html>
• <body>

• <?php
• for ($i=1; $i<=5; $i++)
• {
• }
• ?>

• </body>
• </html>

FUNCTION • <html>
• <body>

• <?php
• function writeName()
• {
• echo “Mohammed";
• }

• echo "My name is ";
• writeName();
• ?>

• </body>
• </html>

•
FUNCTION •
<html>
<body>

• <?php
• function writeName($fname,$punctuation)
• {
• echo $fname . " Refsnes" . $punctuation . "<br />";
• }

• echo "My name is ";
• writeName(“Moha,".");
• echo "My sister's name is ";
• writeName(“nona","!");
• echo "My brother's name is ";
• writeName(“amjad","?");
• ?>

• </body>
• </html>

FUNCTION • <html>
• <body>

• <?php
• function add($x,$y)
• {
• $total=$x+$y;
• return $total;
• }

• echo "1 + 16 = " . add(1,16);
• ?>

• </body>
• </html>

FORM • <html>
• <body>

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

• </body>
• </html>

FORM • <html>
• <body>
&
POST
• Welcome <?php echo $_POST["fname"];
?>!<br />
• You are <?php echo $_POST["age"]; ?>
years old.

• </body>
• </html>

GET • <form action="welcome.php"
method="get">
• Name: <input type="text"
name="fname" />
• Age: <input type="text" name="age" />
• <input type="submit" />
• </form>

• Welcome <?php echo $_GET["fname"];
?>.<br />
• You are <?php echo $_GET["age"]; ?>
years old!

REQUEST • Welcome <?php echo
$_REQUEST["fname"]; ?>!<br />
• You are <?php echo $_REQUEST["age"];
?> years old.

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