Please help with PHP program:

Write a PHP program to calculate the area of the following geometrical shapes. The formula for calculating area is given.

• Square: side * side (b) Rectangle: length * width, (c) Parallelogram: base * height (d)Triangle: base * height / 2

(e) Circle: Pi * radius * radius.

Create three text boxes and a button. In the first textbox user types a string, say Rectangle, read the text box and identify the string. In the next two boxes user types the two values, say sides. Calculate the area using the corresponding formula and display the result as shown:

The area of Triangle/Rectangle/circle is xx square inches