PHP | clearstatcache() Function

Hello dear readers! welcome back to another edition of our tutorial on PHP. In this tutorial guide, we are going to be discussing about the PHP clearstatcache() Function.

The built-in PHP clearstatcache() function clears the file status cache. PHP caches data for some functions for better performance. If a file has checked several times in a script, we may want to avoid caching to get the correct results, then make use of clearstatcache() function.

Syntax

Following below is the syntax to use this function -

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

READ: PHP | chown() Function

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

READ: PHP | chgrp() Function

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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