List files and directories inside the specified path in PHP

List of files:

• 22_2011.pdf
• 6_2011.pdf
• 62_2011.pdf
• 38_2011.pdf
• listagem.php
• file_index.htm
• 1_2011.pdf
• 2011.pdf
• 82_2011.pdf
• 29_2011.pdf
• 87_2011.pdf
• 109_2011.pdf