文件

//文件：文件和文件夹

//1.判断文件
//var_dump(filetype("./aa"));
//var_dump(is_dir("./aa"));
//echo date("Y-m-d H:i:s",fileatime("./aa.txt"));
//echo filesize("aa.txt");<br />
//var_dump(file_exists("./aaa.txt"));

//2.文件路径
//根: / 
//php里面/代表根（是磁盘目录）
//var_dump(file_exists("/wamp/www/11.php"));
//网页里面/代表根(是www目录)

//echo $_SERVER['DOCUMENT_ROOT'];
//echo basename("/wamp/www/11.php",".php");
//echo dirname("/wamp/www/11.php");
//var_dump(pathinfo("/wamp/www/11.php"));
//echo realpath("./aa.txt");

//目录操作
//rmdir("./bb");//只能删除空文件夹
//rename("./cc","./aa/dd");
//var_dump(glob("./fenye/*.php"));

/*$dir = opendir("./fenye");

while($f = readdir($dir))
{
    echo $f."<br>";
}

closedir($dir);*/

//给一个文件夹，读取文件夹里面文件的数量

/*echo ShuLiang("./fenye");

//给一个文件夹，返回该文件夹下所有文件的数量
function ShuLiang($filename)
{
    $sum=0;
    
    $dir = opendir($filename);
    while($f = readdir($dir))
    {
        if($f=="." || $f=="..")
        {
        }
        else
        {
            $lujing = $filename."/".$f;
            if(is_file($lujing))
            {
                $sum++;
            }
            else
            {
                $sum = $sum+ShuLiang($lujing);
            }
        }
    }
    closedir($dir);
    
    return $sum;
}*/


//文件操作
//touch("./cc.docx");
//copy("./cc.txt","./fenye/cc.txt")
//unlink("./cc.txt");

//echo file_get_contents("http://www.baidu.com");
//file_put_contents("./ceshi.php","hello");
//readfile("http://www.baidu.com");
//var_dump(file("http://www.baidu.com"));

//$f = fopen("./aa.txt","a");
//fwrite($f,"world");
//echo fgetc($f);
//echo fgets($f);
//echo fread($f,2);

//fclose($f);

//给一个文件夹，删除该文件夹
ShanChu("./zhanneixin");
function ShanChu($filename)
{
    if(is_dir($filename))
    {
        $dir = opendir($filename);
        
        while($f = readdir($dir))
        {
            if($f=="."||$f=="..")
            {
                
            }
            else
            {
                $fname = $filename."/".$f;
                if(is_file($fname))
                {
                    unlink($fname);
                }
                else
                {
                    ShanChu($fname);
                }
            }
        }
        
        closedir($dir);
        rmdir($filename);
    }
    else
    {
        unlink($filename);
    }
}