Client Mac addr PHP Clearstatcache functions

Definition and usage
The function of the Clearstatcache () is to clear the file state cache.
PHP's cached data is advantageous for faster and better running functions. If a file has been tested multiple times in a script, you may be prevented from caching the correct results. To achieve this, you can use the Clearstatcache () function.
Grammar
Clearstatcache ()
Tips and Notes
Tip: Perform a cached function:
Stat ()
Lstat ()
File_exists ()
Is_writable ()
Is_readable ()
Is_executable ()
Is_file ()
Is_dir ()
Is_link ()
Filectime ()
Fileatime ()
Filemtime ()
Fileinode ()
Filegroup ()
Fileowner ()
FileSize ()
FileType ()
Fileperms ()
Case

Copy the Code code as follows:

Check FileSize
echo filesize ("test.txt");
echo "
";
$file = fopen ("Test.txt", "A +");
Truncate file
Ftruncate ($file, 100);
Fclose ($file);//clear cache and check filesize againcle
Arstatcache ();
echo filesize ("test.txt");
?>

The code above will output the following result:
792100

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