PHP | clearstatcache() Function

PHP clearstatcache() Function


Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP clearstatcache() Function.

The built-in PHP clearstatcache() function is used to clear file status cache. PHP caches data for functions for a better performance. If a file has checked many times in a script, then we may want to avoid caching. To get the correct results, use the clearstatcache() function.

Syntax

Following below is the syntax to use this function -

void clearstatcache ([ bool $clear_realpath_cache = FALSE [, string $filename ]] )


This function caches information about a specific filenames, so we only need to call the built-in PHP clearstatcache() function if we can perform so many operations on the same filename, and require the information about that particular file not to be cached.

Example

Try out the below example -

<?php
   // check filesize
   echo filesize("/PhpProject/sample.txt");
   echo "\n";

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

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

Output

When the above code is executed, it will produce the following result -

25
100


Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the PHP copy() Function.

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