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PHP clearstatcache() Function


❮ Complete PHP Filesystem Reference

Definition and Usage

The clearstatcache() function clears the file status cache.

PHP caches data for some functions for better performance. If a file is being checked several times in a script, you might want to avoid caching to get correct results. To do this, use the clearstatcache() function.

Syntax

clearstatcache()

Tips and Notes

Tip: Functions that are caching:

  • 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()

Example

<?php
//check filesize
echo filesize("test.txt");
echo "<br />";

$file = fopen("test.txt", "a+");
// truncate file
ftruncate($file,100);
fclose($file);

//Clear cache and check filesize again
clearstatcache();
echo filesize("test.txt");
?>

The output of the code above could be:

792
100

❮ Complete PHP Filesystem Reference