Detailed introduction to PHP file operations (1)

黄舟
Release: 2023-03-06 19:12:01
Original
1252 people have browsed it

Judge file type

var_dump(filetype("./img")); //返回文件类型,目录或文件
var_dump(is_dir("./img/11.png")); //判断给的文件是不是目录
is_file(); //判断给的文件是不是文件
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File attributes

var_dump(date("Y-m-d H:i:s",fileatime("./img/11.png"))); //文件上次访问时间
var_dump(date("Y-m-d H:i:s",filemtime("./img/11.png"))); //文件修改时间
echo filesize("./img/11.png"); //文件大小
filectime("") //文件创建时间
file_exists("") //文件是否存在
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File path

/代表根  网页里面代表www目录   php里面代表磁盘根 
var_dump(file_exists("/wamp/www/1220/wenjian/img/11.png")); //文件是否存在
echo $_SERVER['DOCUMENT_ROOT']; //取服务器根路径
echo basename("/wamp/www/1220/wenjian/img/11.png"); //路径中获取文件名
echo dirname("/wamp/www/1220/wenjian/img/11.png"); //路径中目录名
var_dump(pathinfo("/wamp/www/1220/wenjian/img/11.png")); //返回数组
echo realpath("./img/11.png");//将相对路径转化为绝对路径
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Traverse directory

var_dump(glob("./ajax/*")); //返回该目录下所有文件数组
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Give me a folder and return the number of all files in the folder

function ShuLiang($url)
{
   $sl = 0;
   
   $arr = glob($url);
   foreach($arr as $v)
   {
      if(is_file($v))
      {
         $sl++;
      }
      else
      {
         $sl += ShuLiang($v."/*");
      }
   }
   
   
   return $sl;
}
echo ShuLiang("./ajax/*");
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