List files and directories inside the specified path in PHP

List of files:

• 2003_2004.pdf
• 6_2003_2004.pdf
• 62_2003_2004.pdf
• 17_2003_2004.pdf
• listagem.php
• file_index.htm
• 28_2003_2004.pdf
• 1_2003_2004.pdf
• 54_2003_2004.pdf
• 30_2003_2004.pdf
• 39_2003_2004.pdf
• 71_2003_2004.pdf