foreach loop not working in php

1/*
2For loop in php
3*/
4
5<?php
6for ($i = 0; $i < 10; $i++) {
7     echo $i."<br>";
8} 
9?>

1static float CalculatePower(float x, int y)
2        {
3            float temp;
4            if (y == 0)
5                return 1;
6            temp = CalculatePower(x, y / 2);
7            if (y % 2 == 0)
8                return temp * temp;
9            else
10            {
11                if (y > 0)
12                    return x * temp * temp;
13                else
14                    return (temp * temp) / x;
15            }
16        }

1<?php
2$songs = $_POST["songs"];
3//$songs = Array("one","two","three");
4foreach ($songs as $song) 
5{
6   $songStr = test_input($song);
7   $songsOut .= "<li>$songStr</li>";
8};
9
10$songList = "Songs: <ol> $songsOut </ol> \r\n";
11echo $songList;
12
13function test_input($data)
14{
15   $data = trim($data);
16   $data = stripslashes($data);
17   $data = htmlspecialchars($data);
18   return $data;
19}
20
21?>