PHP realpath_cache_size() Function

The realpath_cache_size() function is an inbuilt function in PHP that allows you to get or set the size of the realpath cache in bytes.

realpath_cache_size(): int

Parameter: This function does not accept any parameters.

Return Value: This function returns the current size of the real path cache in bytes.

Example 1: The following program demonstrates the  realpath_cache_size() function.

<?php
$cache_size = realpath_cache_size();
echo "The current size of the realpath cache is " . 
      $cache_size . " bytes.";
?>

Output:

The current size of the realpath cache is 538 bytes.  

Example 2: The following program demonstrates the realpath_cache_size() function.

<?php
$threshold = 10485760;
$cache_size = realpath_cache_size();

if ($cache_size > $threshold) {
    echo "The current size of the realpath cache
        is greater than the threshold.";
} else {
    echo "The current size of the realpath cache is less 
        than or equal to the threshold.";
}
?>

Output:

The current size of the realpath cache 
is less than or equal to the threshold.

Reference: https://www.php.net/manual/en/function.realpath-cache-size.php