PHP简略源码学习

";		function directory($dir){		$dp = opendir($dir);		while($file = readdir($dp)){			if($file !="." && $file !=".."){				$path=$dir. "//m.sbmmt.com/m/". $file;	/* 取得目录路径 */								if(is_dir($path)){	/* 判断是否有子目录 */					directory($path);	/* 函数递归调用 */					echo "
";				}				else{ 					printf(''.$path.'

');				}			}		}		closedir($dp);	} 	directory(".");?>

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