Encrypted and Decrypted using md5

<?php
 
echo 'Input = '.$input ="Admin".'<br>';

$encrypted = encryptIt( $input );
$decrypted = decryptIt( $encrypted );

echo 'Encrypted = '.$encrypted . '<br />' .'Decrypted = '.$decrypted;

function encryptIt( $q ) {
    $cryptKey  = 'qJB0rGtIn5UB1xG03efyCp';
    $qEncoded      = base64_encode( mcrypt_encrypt( MCRYPT_RIJNDAEL_256, md5( $cryptKey ), $q, MCRYPT_MODE_CBC, md5( md5( $cryptKey ) ) ) );
    return( $qEncoded );
}

function decryptIt( $q ) {
    $cryptKey  = 'qJB0rGtIn5UB1xG03efyCp';
    $qDecoded      = rtrim( mcrypt_decrypt( MCRYPT_RIJNDAEL_256, md5( $cryptKey ), base64_decode( $q ), MCRYPT_MODE_CBC, md5( md5( $cryptKey ) ) ), "\0");
    return( $qDecoded );
}

?>

Read More

Find the root of equation: X^2-2X-3 = 0. using iterative method. Take initial value X = 2

Find the root of equation: X²-2X-3 = 0. using iterative method. Take initial value X = 2 [Calculation up to 4 decimal places]

Program:
<?php
    $c = 2; // Counter Start Value Assign Here.
    $x = "";
    $x2 = 2;    // Initial value Assign Here.
   
    echo "X 1 = 2 <br />"; // Assign X1 Value Here.
   
    for ($i = 2; $i <= $c; $i = $i+1)    {
        $x=$x2;
        // Simplify Equation Here.
        $x2 = number_format(sqrt((2*$x)+3),"4",".","");
        $c++;    // Increment Counter Value.
        echo "X $i = " .$x2 . '<br />';

        if ($x === $x2) {
            echo "<h3 style = 'color:green'> Hello same value $x2 is found. </h3>";
            $c = $i-1;
        }
    }
?>

Read More

Find the root of equation: x-cosx = 0. using iterative method. Take initial value X = 1

Find the root of equation: x-cosx = 0. using iterative method. Take initial value X = 1 [Calculation up to 4 decimal places]

Program:
 <?php
    $c = 2; // Counter Start Value Assign Here.
    $x = "";
    $x2 = 1;    // Initial value Assign Here.
   
    echo "X 1 = 1 <br />"; // Assign X1 Value Here.
   
    for ($i = 2; $i <= $c; $i = $i+1)    {
        $x=$x2;
        // Simplify Equation Here.
        $x2 = number_format((cos($x)),"4",".","");
        $c++;    // Increment Counter Value.
        echo "X $i = " .$x2 . '<br />';

        if ($x === $x2) {
            echo "<h3 style = 'color:green'> Hello same value $x2 is found. </h3>";
            $c = $i-1;
        }
    }
?>

Read More

Consider the quadratic equation: X^2-2X-2 = 0. Find the root of this equation using iterative method. Take initial value X1 = 1

Consider the quadratic equation: X²-2X-2 = 0. Find the root of this equation using iterative method. Take initial value X1 = 1 [Calculation up to 3 decimal places]

Program:
<?php
    $c = 2; // Counter Start Value Assign Here.
    $x = "";
    $x2 = 1;    // Initial value Assign Here.
   
    echo "X 1 = 1 <br />"; // Assign X1 Value Here.
   
    for ($i = 2; $i <= $c; $i = $i+1)    {
        $x=$x2;
        // Simplify Equation Here.
        $x2 = number_format((1-(0.5*($x*$x))),"3",".","");
        $c++;    // Increment Counter Value.
        echo "X $i = " .$x2 . '<br />';

        if ($x === $x2) {
            echo "<h3 style = 'color:green'> Hello same value $x2 is found. </h3>";
            $c = $i-1;
        }
    }
?>

Read More

Find the root of given eqution using iterative method.

Consider the quadratic equation: 2X²-4X+1 = 0. Find the root of this equation using iterative method. Take initial value x=1 [Calculation up to 4 decimal places]

Program:

<?php
    $c = 2; // Counter Start Value Assign Here.
    $x = "";
    $x2 = 1;    // Initial value Assign Here.
   
    echo "X 1 = 1 <br />"; // Assign X1 Value Here.
   
    for ($i = 2; $i <= $c; $i = $i+1)    {
        $x=$x2;
        // Simplify Equation Here.
        $x2 = number_format(((0.5*($x*$x))+(1/4)),"4",".","");
        $c++;    // Increment Counter Value.
        echo "X $i = " .$x2 . '<br />';

        if ($x === $x2) {
            echo "<h3 style = 'color:green'> Hello same value $x2 is found. </h3>";
            $c = $i-1;
        }
    }
?>

Read More