unlink（）不适用于绝对路径

Question

I'm working on a method which delete pictures using unlink() . However I can't find a way to make it work using absolute path.

Here is my code :

$img = $_SERVER['DOCUMENT_ROOT'].'/i/koala.png';
unlink($img);

Error :

Warning: unlink(/var/www/html/i/koala.png): No such file or directory in /var/www/html/king/test.php on line 15

Any help?

Answer 1

When you cobble together various strings to make a path, you should use realpath to verify it and convert any relative fragments like /../ .

http://php.net/manual/en/function.realpath.php

$path = $_SERVER['DOCUMENT_ROOT'].'/i/koala.png';
$img = realpath($path);

$img will either be false, or a string of a valid path!

Answer 2

check it now

$filename = '/var/www/html/i/koala.png';

if(file_exists($filename))
{
  chmod($filename, 777);
  unlink($filename);
  echo "file has deleted";
}
else
{
 echo "file not exists";
}