PROG 8

8 (a) . Write the PHP programs to do the following: a) Implement simple calculator operations. b) Find the transpose of a matrix. c) Multiplication of two matrices. d) Addition of two matrices. program8a.php
<html> <head> <style>   table, td, th   {    border: 1px solid black;    width: 35%;    text-align: center;    background-color: DarkGray;   }   table { margin: auto; }    input,p { text-align:right; }  </style> </head> <body> <form method="post">  <table>   <caption><h2> SIMPLE CALCULATOR </h2></caption>> <tr><td>First Number:</td><td><input type="text" name="num1" /></td> <td rowspan="2"><input type="submit" name="submit" value="calculate"></td></tr> <tr><td>Second Number:</td><td><input type="text" name="num2"/></td></tr>   </form>

<?php  if(isset($_POST['submit']))


{ 
$num1 = $_POST['num1'];   $num2 = $_POST['num2'];   if(is_numeric($num1)  andis_numeric($num1) )  { echo "<tr><td> Addition :</td><td><p>".($num1+$num2)."</p></td>"; echo "<tr><td> Subtraction :</td><td><p>  ".($num1-$num2)."</p></td>"; echo "<tr><td> Multiplication :</td><td><p>".($num1*$num2)."</p></td>"; echo "<tr><td>Division :</td><td><p> ".($num1/$num2)."</p></td>"; echo "</table>";  } else { echo"<script type='text/javascript' > alert(' ENTER VALID NUMBER');</script>";     }

}   ?> </body> </html>

---------------prog 8(b)---------
Program8b.php
<?php
$a = array(array(1,2,3),array(4,5,6),array(7,8,9)); $b = array(array(7,8,9),array(4,5,6),array(1,2,3));

$m=count($a); $n=count($a[2]); $p=count($b); $q=count($b[2]);

echo "the  first matrix    :"."<br/>"; for ($row = 0; $row < $m; $row++) {   for ($col = 0; $col < $n; $col++)            echo " ".$a[$row][$col];   echo "<br/>"; }

echo "the  second matrix    :"."<br/>"; for ($row = 0; $row < $p; $row++) {   for ($col = 0; $col < $q; $col++)            echo "  ".$b[$row][$col];      echo "<br/>"; }

echo "the transpose for the first  matrix  is:"."<br/>"; for ($row = 0; $row < $m; $row++) {   for ($col = 0; $col < $n; $col++)     echo " ".$a[$col][$row];   echo "<br/>"; }
if(($m===$p) and ($n===$q)) {   echo "the addition of matrices  is:"."<br/>";   for ($row = 0; $row < 3; $row++) {    for ($col = 0; $col < 3; $col++)              echo "  ".$a[$row][$col]+$b[$row][$col]." ";        echo "<br/>";   } }

if($n===$p){   echo " The multiplication of matrices: <br/>";   $result=array();   for ($i=0; $i < $m; $i++) {    for($j=0; $j < $q; $j++){                 $result[$i][$j] = 0;     for($k=0; $k < $n; $k++)       $result[$i][$j] += $a[$i][$k] * $b[$k][$j];            }   }   for ($row = 0; $row < $m; $row++) {    for ($col = 0; $col < $q; $col++)      echo " ".$result[$row][$col];    echo "<br/>";   } } ?>

output:
the first matrix:
1 2 3
4 5 6
7 8 9 

the second matrix:
7 8 9
4 5 6
1 2 3

the transpose of the first matrix: 
1 4 7
2 5 8
3 6 9

the addition of matrices is:
8 10 12
8 10 12
8 10 12

the multiplication of matrices:
18 24 30
54 69 84
90 114 138

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