Question

In: Computer Science

1. Create a PHP page with standard HTML tags. Remember to save the file with the...

1. Create a PHP page with standard HTML tags. Remember to save the file with
the .php extension.
Inside the <body> tag, create a PHP section that will show the text "Hello
World!"
2. For this exercise, echo the phrase "Twinkle, Twinkle little star." Create
two variables, one for the word "Twinkle" and one for the word "star". Echo
the statement tothe browser.
3. PHP includes all the standard arithmetic operators. For this PHP
exercise, you will use them along with variables to print equations to the
browser. In your script, create the following variables:
$x=10;
$y=7;
Write code to print out the following:
10 + 7 = 17
10 - 7 = 3
10 * 7 = 70
10 / 7 = 1.4285714285714
10 % 7 = 3
Use numbers only in the above variable assignments, not in the echo
statements. You will need a third variable as well.
Note: this is intended as a simple, beginning exercise, not using arrays or
loops.
4. Arithmetic-assignment operators perform an arithmetic operation on the
variable at the same time as assigning a new value. For this PHP exercise,
write a script to reproduce the output below. Manipulate only one variable
using no simple arithmetic operators to produce the values given in the
statements.
Hint: In the script each statement ends with "Value is now $variable."
Value is now 8.
Add 2. Value is now 10.
Subtract 4. Value is now 6.
Multiply by 5. Value is now 30.
Divide by 3. Value is now 10.
Increment value by one. Value is now 11.
Decrement value by one. Value is now 10.

Solutions

Expert Solution

Question 1 

<!DOCTYPE>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    </head>
    <body>

        <?php
            echo "Hello World";
        ?>

    </body>
</html>

Code

Output

Question 2



<!DOCTYPE>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    </head>
    <body>

        <?php
            $word1 = "Twinkle";
            $word2 = "star";

            echo $word1.", ".$word1." little ".$word2;
            
        ?>

    </body>
</html>

Code

Output

Question 3


<!DOCTYPE>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    </head>
    <body>

        <?php

            $x = 10;
            $y = 7;
            $res = $x + $y;
            print($x." + ".$y." = ".$res."<br>");
            $res = $x - $y;
            print($x." - ".$y." = ".$res."<br>");
            $res = $x * $y;
            print($x." * ".$y." = ".$res."<br>");
            $res = $x / $y;
            print($x." / ".$y." = ".$res."<br>");
            $res = $x % $y;
            print($x." % ".$y." = ".$res."<br>");
            
        ?>

    </body>
</html>

Code

Output

Question 4 

<html>
    <body>
        <?php
            $x = 8;
            echo "Value is now ".$x."<br>";
            $y = 2;
            echo "Add ".$y.".";
            $x = $x + $y;
            echo "Value is now ".$x.".<br>";
            $y = 4;
            echo "Subtract ".$y.".";
            $x = $x - $y;
            echo "Value is now ".$x.".<br>";
            $y = 5;
            echo "Multiply by ".$y.".";
            $x = $x * $y;
            echo "Value is now ".$x.".<br>";
            $y = 3;
            echo "Divide by ".$y.".";
            $x = $x / $y;
            echo "Value is now ".$x.".<br>";
            echo "Increment value by one. ";
            $x++;
            echo "Value is now ".$x.".<br>";
            echo "Decrement value by one. ";
            $x--;
            echo "Value is now ".$x.".<br>";  
        ?>
    </body>
</html>

Code

Output

venereology answered 1 month ago
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