10. VTU WEB TECHNOLOGY LAB | READ NOW

VTU WEB TECHNOLOGY LAB

10] WRITE A PHP PROGRAM TO SORT THE STUDENT RECORDS WHICH ARE STORED IN THE DATABASE USING SELECTION SORT.

STEPS TO EXECUTE PHP PROGRAM

1. Copy the php code given below
2. Save it with .php file name extension
3. Place the .php file in the htdocs of XAAMP
4. Place the .sql file in phpMyAdmin database panel
5. Start the XAAMP control panel
6. Start Apache server
7. Start MySQL server
8. Click on admin in XAMPP Control pale
9. Replace the url dashboard name with your php file name
10. Execution completed

Solution – prog10.php

<?php 
	$servername = "localhost";
	$username = "root";
	$password = "";
	$dbname = "weblab";
	$conn = mysqli_connect($servername, $username, $password, $dbname);
	if (!$conn) {
		die("Connection failed: " . mysqli_connect_error());
	}
	$sql = "SELECT * FROM student";
	$result = $conn->query($sql); 
	$usn = array() ;
	echo "<table border='2'><caption>Before Sorting </caption><br>";
	echo "<tr><th>USN</th><th>NAME</th><th>Marks</th></tr>"; 
	if ($result->num_rows > 0)
	{
		while($row = $result->fetch_assoc())
		{ 
			echo "<tr><td>". $row["usn"]."</td>";
			echo "<td>". $row["name"]."</td>";
			echo "<td>". $row["marks"]."</td></tr>";
			$usn[] = $row["usn"] ;
		}
	}
	$n = sizeof($usn) ;
	for($i = 0 ; $i < $n-1 ; $i++ )
	{
		$pos = $i ;
		for($j = $i + 1 ; $j < $n ; $j++ )
		{
			if( $usn[$pos] < $usn[$j])
			{
				$pos = $j ;
			}
		}
		if( $pos != $i)
		{
			$temp = $usn[$i] ;
			$usn[$i] = $usn[$pos] ;
			$usn[$pos] = $temp ;
		}
	}
	$name = [] ;
	$marks = [] ;
	$result = $conn->query($sql);
	if ($result->num_rows> 0)
	{
		while($row = $result->fetch_assoc()) 
		{
			for($i=0;$i<$n;$i++) 
			{
				if($row["usn"] == $usn[$i]) 
				{
					$name[$i]=$row["name"];
					$marks[$i]=$row["marks"];
				}
			}
		}
	}
	echo "<br><table border='2'><caption>After Sorting </caption><br>";
	echo "<tr><th>USN</th><th>NAME</th><th>Marks</th></tr>"; 
	for($i = 0 ; $i < sizeof($usn) ; $i++)
	{
		echo "<tr><td>". $usn[$i]."</td>";
		echo "<td>". $name[$i]."</td>";
		echo "<td>". $marks[$i]."</td></tr>";
	}
?>

WEB TECHNOLOGY – Output