PHP 2021 Old paper Solution

<?php
    function ascendingOrder($arr){
        sort($arr);
        foreach($arr as $value){
            echo $value . " ";
        }
    }
?>

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<?php

function ascendingOrder($arr){

sort($arr);

foreach($arr as $value){

echo $value . " ";

}

?>

<html>
<head>
	<title>Form Validation</title>
	<script>
		function validateForm() {
			var x = document.forms["form_data"]["name"].value;
			if (x == "") {
				alert("Name must be filled out");
				return false;
			}
			var y = document.forms["form_data"]["age"].value;
			if (isNaN(y) || y < 1 || y > 100) {
				alert("Age must be a number between 1 and 100");
				return false;
			}
			var z = document.forms["form_data"]["comments"].value;
			if (z == "") {
				alert("Please enter a comment");
				return false;
			}
		}
	</script>
</head>
<body>
	<form name="form_data" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" onsubmit="return validateForm()">
		Name: <input type="text" name="name"><br><br>
		Age: <input type="text" name="age"><br><br>
		Comments: <textarea name="comments"></textarea><br><br>
		<input type="submit" value="Submit">
	</form>
</body>
</html>

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<html>

<head>

<title>Form Validation</title>

function validateForm() {

var x = document.forms["form_data"]["name"].value;

if (x == "") {

alert("Name must be filled out");

return false;

}

var y = document.forms["form_data"]["age"].value;

if (isNaN(y) || y < 1 || y > 100) {

alert("Age must be a number between 1 and 100");

return false;

}

var z = document.forms["form_data"]["comments"].value;

if (z == "") {

alert("Please enter a comment");

return false;

}

</script>

</head>

<body>

<form name="form_data" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" onsubmit="return validateForm()">

Name: <input type="text" name="name"><br><br>

Age: <input type="text" name="age"><br><br>

Comments: <textarea name="comments"></textarea><br><br>

</form>

</body>

</html>

<?php

// Assumption: You have a database table called "subjects"
// with 3 columns: "subject_code", "subject_description", "credit"

// Create connection
$conn = new mysqli("localhost", "username", "password", "databaseName");

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// insert data into subjects table
$sql = "INSERT INTO subjects (subject_code, subject_description, credit)
VALUES ('ENG101', 'English Composition', '3')";

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();

?>

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<?php

// Assumption: You have a database table called "subjects"

// with 3 columns: "subject_code", "subject_description", "credit"

// Create connection

$conn = new mysqli("localhost", "username", "password", "databaseName");

// Check connection

if ($conn->connect_error) {

die("Connection failed: " . $conn->connect_error);

}

// insert data into subjects table

$sql = "INSERT INTO subjects (subject_code, subject_description, credit)

VALUES ('ENG101', 'English Composition', '3')";

if ($conn->query($sql) === TRUE) {

echo "New record created successfully";

} else {

echo "Error: " . $sql . "<br>" . $conn->error;

}

$conn->close();

?>

<?php
if(isset($_POST['submit']))
{
  $name = $_POST['name'];
  $age = $_POST['age'];
  $gender = $_POST['gender'];

  $file = fopen("Person.txt", "a") or die("Unable to open file!");
  fwrite($file, $name.",".$age.",".$gender. "\n");
  fclose($file);

  echo "Data Saved successfully!";
}
?>
<html>
  <head>
    <title>Person Form</title>
  </head>
  <body>
    <form action="" method="POST">
      Name: <input type="text" name="name"/><br/>
      Age: <input type="text" name="age"/><br/>
      Gender:
      <input type="radio" name="gender" value="Male"/>Male
      <input type="radio" name="gender" value="Female"/>Female
      <br/>
      <input type="submit" name="submit" value="Submit"/>
    </form>
  </body>
</html>

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<?php

if(isset($_POST['submit']))

{

$name = $_POST['name'];

$age = $_POST['age'];

$gender = $_POST['gender'];

$file = fopen("Person.txt", "a") or die("Unable to open file!");

fwrite($file, $name.",".$age.",".$gender. "\n");

fclose($file);

echo "Data Saved successfully!";

}

?>

<html>

<head>

<title>Person Form</title>

</head>

<body>

Name: <input type="text" name="name"/><br/>

Age: <input type="text" name="age"/><br/>

Gender:

<input type="radio" name="gender" value="Male"/>Male

<input type="radio" name="gender" value="Female"/>Female

<br/>

</form>

</body>

</html>

<?php
// Start the session
session_start();

// Set Session Variables
$_SESSION['name'] = 'John';
$_SESSION['age'] = 25;
$_SESSION['city'] = 'New York';

// Retrieve Session Variables
echo "My name is " . $_SESSION['name'] . "<br>";
echo "My age is " . $_SESSION['age'] . "<br>";
echo "My city is " . $_SESSION['city'] . "<br>";
?>

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<?php

// Start the session

session_start();

// Set Session Variables

$_SESSION['name'] = 'John';

$_SESSION['age'] = 25;

$_SESSION['city'] = 'New York';

// Retrieve Session Variables

echo "My name is " . $_SESSION['name'] . "<br>";

echo "My age is " . $_SESSION['age'] . "<br>";

echo "My city is " . $_SESSION['city'] . "<br>";

?>