List files and directories inside the specified path in PHP

List of files:

• 7_1993.pdf
• 65_1993.pdf
• 6_1993.pdf
• 34_1993.pdf
• 54_1993.pdf
• listagem.php
• 1993.pdf
• file_index.htm
• 38_1993.pdf
• 79_1993.pdf
• 1_1993.pdf
• 16_1993.pdf
• 11_1993.pdf
• 28_1993.pdf
• 100_1993.pdf