Some PHP practice problems

Given:

<?php
    echo "Please enter your name: ";
    $name = trim (fgets (STDIN));
    echo "Welcome, $name\n";

    if ($name == "Sushil")
        echo "You rock!!!\n";

    print "I'm now going to count to 10\n";

    for ($i=1; $i <=10; $i++)
        echo $i . " ";

    echo "\n";
?>

extend to the following:

1. read three numbers and print the square of each,
2. read three numbers, sort them, and print the square of each,
3. print the even numbers from 0 to 20, and
   
4. print the current date.

A useful resource is the php tutorial.