web essentials - simple message flow and loo.pptx

2.10 Displaying Messages on
Web Page

• The PHP is a server side scripting language and is used to
submit the web page to the client browser. Hence it is a
standard method of embedding the PHP code within the
XHTML document. That means we can use the XHTML tags
in PHP while displaying the output.
• The print function is used to create simple unformatted
output. For example: The string can be displayed as follows
• print "I am proud of my <b>country</b>"
• The numeric value can also be displayed using the print. For
example -print(100);
• It will display the output as 100.
• PHP also makes use of the printf function used in C. For
example
• printf("The student %d has'%f marks".$roll_no.$marks);

Following is a simple PHP document which makes use
of the statements for displaying the output.
<html>
<head>
<title> Output Demo</title>
</head>
<body>
<?php
print "<h2>Welcome to my Website </h2>";
print "<hr/>“;
$roll_no=l;
$name==”AAA”;
printf("<b>The roll number: %d</b>",
$roll_no);
print <br/><b>";
printf("The name: %s",$name);
print "</b>";
?></body></html>

2.11 Flow Control and Loop
2.11.1 if Statements
• The if statement, the if ...
else statement or if ...
elseif statements are used
as selection statements.
This selection is based on
some condition.
• output: C is the largest
number
<html>
<head>
<tit1e>Selection Demo</title>
</head>
<body>
<?php
print "<h2>Selection Statement </h2>";
$a=10;
$b=20;
$c=30;
if($a>$b)
if($a>$c)
print "<b><I>a is the largest number </I></b>";
else
print "<b><I> c is the largest number</I></b>";
else
if($b>$c)
print "<b><I> b is the largest number</I></b>";
else
print "<b><I>c is the largest number</I></b>";
?></body></html>

2.11.2 Switch Statement
• Similar to if statement the switch statement
can also be used for selection. Following is a
simple PHP script for demonstrating switch
statement.

<?php
$today = getdate( );
Switch($today['weekday'] )
{
case "Monday": print "Today
is Monday";
break;
case "Tuesday":print "Today is
Tuesday";
break;
case "Wednesday":print
"Today is Wednesday";
break;
case "Thursday":print "Today is
Thursday";
break;
case "Friday":print "Today is Friday";
break;
case "Saturday":print "Today is
Saturday"; .
break;
case "Sunday":print "Today is
Sunday";
break;
default: print "Invalid input";
}?>
output : today is Friday

2.11.3 Loop Statements
• The while, for and do-
while statements of
PHP are similar to
JavaScript,
• Following is a simple
PHP script which
displays the first 10
number
• <?php
• $i=l;
• print "The numbers are ...";
• print "<br/>";
• while($i < = 10)
• {
• print $i;
• print "<br/>";
• $i++;
• }
• ?>
• Output: the numbers are 1 2 3 4 5
6 7 8 9 10

do ... while
<?php
$i=1;
print "The numbers are .,.":
print "<br/>"; ,
do
{
print “$i”;
print "<br/>";
$i++;
} while($i<=10);
?>
For
<?php
print "The numbers
are .,.":
print "<br/>";
for($i= 1;$i <10;i++)
{
print $i;
print "<br/>";
} ?>

2.11.4 Examples based on Control Statement
a)Write a PHP script to display the squares and cubes of 1to 10 numbers.
Sol. :
<html>
<head>
<title> Sqaure and Cube
Table </title>
</head>
<body>
<center>
<?php
print "<table border =1>";
print "<tr>";
print "<th>Number</th>";
print "<th>Square</th>";
print ".<th>Cube</th>";
print "</tr>";
for($i= 1;$i < = 10;$i+ +)
{
print "<tr>";
print "<td>$i";
print "</td>";
print "<td>";
print $i*$i;
print "</td>";
print "<td>";

print pow($i,3);
print "</td>";
print "</tr>";
}
print "</table>";
?>
</center>
</body></html>

b)Write a PHP script to compute the sum and
average of N numbers .
<html >
<head>
<title> Sum and Average
</title>
</head>
<body>
<center>
<?php
$sum=0;
for($i= 1;$i< = 10;$i++ )
{
$sum+=$i;
}
$avg=$sum/10;
print ''The Sum is: $sum";
print "<br/>";
print ''the Average is: $avg";
?.>
</center></body></html>
Output: the sum is : 55
The average is: 5.5

c)Write PHP programs to print whether current year is
leap year or not.
<html>
<head>
<title> Leap Year Demo</title>
</head>
<body>
<?php
$year=2016;
print "<br/>";
if($year%4= = 1)
{ printf("Year %d is not a leap
year",$year); }
else
{ printf(''Year %d is a leap
year",$year); }
?>
</body></html>
output : year 2016 is a
leap year.

d)Write PHP programs to print whether given number
is odd or even.
<html>
<head>
<title>Even Odd Demo</title>
</head>
<body>
<?php
for($i=l;$i < = 10;$i+ +)
{
$num=$i;
print "<br/>";
if($num%2= = 1)
{
printf("Number %dis Odd",
$num); }
else
{ printf("Number %dis Even",
$num); }
}
?>
</body>
</html
>

e)Write PHP script to compute the sum of positive
integers upto 30 using do-while statement.
<html >
<head>
<title>Sum of
Integers</title>
</head>
<body>
<?php
$sum=0;
$i=1;
do
{
$sum =$sum+$i;
$i++;
}while($i< = 30);
printf("The sum of first 30
positive integers is %d",$sum);
?>
</body></html>
output: the sum of positive
integers is 465

f) Write PHP script to compute factorial of 'n'using
while or for loop construct.
<html>
<head>
<title> Factorial
Program</title >
</head>
<body>
<?php
$n = 5;
$factorial = 1;
for ($i=$n; $i>=l; $i--)
{
$factorial = $factorial * $i;
}
echo "Factorial of $n is
$factorial";
?>
</body>
</html>
Output: Factorial of 5 is 120

g) Write PHP script to display Fibonacci of length 10 .
<html>
<head>
< title> Fibonacci Series < /title
>
</head>
<body>
<?php
$i=l;
$j=l;
print "<b>Fibinacci Series
br/>":
printf("%d, %d",$i,$j);
for($count=
1;$count<9;$count+ +)
{
$k=$i+$j;
$i=$j;
$j=$k;
printf(", %d",$k);
}
?></body></html>
Output Fibinacci series
1,1,2,3,5,8,13,21,34,55

h)Construct a PHP script to compute the squareRoot,
Square, Cube and Quad of 10 numbers.
html>
<head>
<title > SQUARE CUBE QUAD
DEMO</title>
</head>
<body>
<?php
print "<b>Table<br/>";
print "<table border='l'>";
print
"<tr><th>num</th><th>Sqr</th>
<th>Cube</th><th>
Quad</th></tr>";
for($count=l;$count< = 10;$count+
+)
{$sq=$count*$count;
$cube=$count*$count*$count;
$quad
=$count*$count*$count*$count
;
print
"<tr><td>$count</td><td>$sq</
td><td>$cube</td><td>$quad</
td></tr>";
}print "</table>";
?></body></html>

i) With the use of PHP, switch case and if structure perform the following
and print appropriate message.
i) Get today's date ii) If date is 3, it is dentist appointment. iii) If date is 10,
go to conference. Iv) If date is other than 3 and 10, no events are scheduled.
<!DOCTYPEhtml>
<html>
<body>
<?php
echo "Today date is " .
date("d/m/y") . "<br>";
if((date("d") <3) || (date("d") >
10)).
echo "No Event!!!";
else if((date(“d”)3)&&(date(“d")<
10))
echo "No Event!!!";
else
{
switch( date("d"))
{
case 3 : echo "Dentist Appointment";
break;
case 10 : echo "Go to Conference";
break;
}
}
?></body></html>
Output:Today date is 25/12/15No
event!!!

J)Write a PHP code to display the following pattern
1
01
101
0101
1 0101
<html ><head>
</head>
<body>
<?php
for($i=0;$i <7;$i + +)
{
for($j = l;$j <$i;$j ++)
{
if(($i+$j)%2= =0)
{
printf("0");
}
else
{
printf("1");
}}
print "<br/>"; }?>
</body></html>

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