11. Write a PHP program to create a web form that contains a textbox for names, and checkboxes for hobbies. When a form is submitted, check a name is entered, and at least one of the hobbies is selected.
<!doctype html>
<html>
<head>
<title>Year : 2016 | Q : 11</title>
</head>
<body>
<form method = 'post'>
Name: <input type = 'text' name = 'nm'><br>
Hobbies: h1<input type = 'checkbox' name = 'h1' value = 'h1'> h2<input type = 'checkbox' name = 'h2' value = 'h2'><br>
<input type = 'submit' name = 'sub' value = 'Submit'>
</form>
<?php
if(isset($_POST['sub']))
{
$nm = $_POST['nm'];
$h1 = '';
$h2 = '';
if(isset($_POST['h1']))
$h1 = $_POST['h1'];
if(isset($_POST['h2']))
$h2 = $_POST['h2'];
if($nm!=''&&($h1!='' || $h2!=''))
echo "Affirmative.";
else
echo "Name field should not be empty, and atleast one hobby should be selected.";
}
?>
</body>
</html>
12. Write a PHP program that displays the contents of the database. Make your own assumptions about the database.
<!doctype html>
<html>
<head>
<title>Year : 2016 | Q : 12</title>
</head>
<body>
<?php
/*
Database name: 'test'
Table name: 'info'
Column names: 'ID', 'Name'
*/
$C = mysqli_connect('localhost','root','','test') or die('Error connecting with the database');
$code = 'SELECT * FROM info';
$R = mysqli_query($C,$code) or die('Error in code');
echo "<table border = '1' cellpadding = '15' cellspacing = '0'>";
echo "<tr> <th>ID</th> <th>Name</th> </tr>";
while($res = mysqli_fetch_array($R))
{
echo "<tr>";
echo " <td>".$res[0]."</td>";
echo " <td>".$res[1]."</td>";
echo "</tr>";
}
echo "</table>";
?>
</body>
</html>
13. Write a PHP function that takes three arguments: principle, rate, and time and returns the calculated interest. Make all the required validation to calculate the interest.
<!doctype html>
<html>
<head>
<title>Year : 2016 | Q : 13</title>
</head>
<body>
<form method = 'post'>
Principle: <input type = 'text' name = 'pri'><br>
Rate: <input type = 'text' name = 'rate'><br>
Time: <input type = 'text' name = 'time'><br>
<input type = 'submit' name = 'cal' value = 'Calculate S.I.'>
</form>
<?php
function si($p,$t,$r)
{
return number_format((($p*$t*$r)/100),2);
}
if(isset($_POST['cal']))
{
$p = $_POST['pri'];
$r = $_POST['rate'];
$t = $_POST['time'];
if(is_numeric($p)&&is_numeric($r)&&is_numeric($t))
echo "Simple Interest: ".si($p,$t,$r);
else
echo "Input valid data";
}
?>
</body>
</html>
14. Write a program to write value taken from user to a file.
<!doctype html>
<html>
<head>
<title>Year : 2016 | Q : 14</title>
</head>
<body>
<form method = 'post'>
<input type = 'text' name = 'inp' placeholder = 'Enter text here' size = '50'>
<input type = 'submit' name = 'add' value = 'Write to file'>
</form>
<?php
if(isset($_POST['add']))
{
$txt = $_POST['inp'];
$f = fopen('Test.txt','w');
if(fwrite($f,$txt))
echo "Text written into the file named 'Test.txt'.";
else
echo "Error writing into the file.";
fclose($f);
}
?>
</body>
</html>
15. Write a PHP program to create a multidimensional array that holds the cities of districts in Kathmandu valley such as Kathmandu(Newroad, Durbar Marg, Thamel), Lalitpur(Patan, Jawlakhel, Kupndole), Bhaktapur(Durbar Square, Suryabinayak). Then display the contents of the array.
<!doctype html>
<html>
<head>
<title>Year : 2016 | Q : 15</title>
</head>
<body>
<?php
$arr = array(
'Kathmandu' => array('Newroad','Durbar Marg','Thamel'),
'Lalitpur' => array('Patan','Jawlakhel','Kupndole'),
'Bhaktapur' => array('Durbar Square','Suryabinayak')
);
foreach($arr as $dis => $city)
{
echo "District: ".$dis."<br>";
foreach($city as $val)
echo " City: ".$val."<br>";
echo "<br>";
}
?>
</body>
</html>