<?php
	$var = "把当前目录下，所以文件以超链接形式给出<br /><br />";
	
	function directory($dir){
		$dp = opendir($dir);
		while($file = readdir($dp)){
			if($file !="." && $file !=".."){
				$path=$dir. "/". $file;	/* 取得目录路径 */
				
				if(is_dir($path)){	/* 判断是否有子目录 */
					directory($path);	/* 函数递归调用 */
					echo "<br/><hr/>";
				}
				else{ 
					printf('<a href="'.$path.'" target="_blank">'.$path.'</a><br/><br/>');
				}
			}
		}
		closedir($dp);
	}
 
	directory(".");

?>

<?php
     phpinfo();
?>

   $number = "5";               # $number is a string
   $sum = 15 + $number;   	# Add an integer and string to produce integer
   print("$sum\n");