How does the caching of is_writable() function in PHP impact the evaluation of directory permissions for mkdir operation?

The caching of the is_writable() function in PHP can impact the evaluation of directory permissions for mkdir operation because the function result may be cached and not reflect the current state of the directory. To solve this issue, you can use clearstatcache() function to clear the file status cache before calling is_writable() to ensure an accurate evaluation of directory permissions. 

// Clear the file status cache before checking directory permissions
clearstatcache();
if (is_writable('/path/to/directory')) {
    mkdir('/path/to/directory/new_directory', 0755);
} else {
    echo 'Directory is not writable';
}

Keywords

caching is_writable() directory permissions mkdir operation evaluation

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