php - Check If Folder Exists Is Not Working -

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i'm trying function recognize if folder exists on server, it's not working. i've tried is_dir function no luck.

this script trying utilized in wordpress plugin, it's using php-based function if file/folder exists. idea why it's not recognizing /docs folder exists? i've verified $filename pulling correct file path on server.

function docs_settings_page() {     $filename = get_stylesheet_directory_uri()."/docs/";     if(file_exists($filename)) {         echo "the folder exists!";     }     else {         echo "sorry - file not exist.";     } }  function docs_create_menu() {     // stuff here }  add_action('admin_menu', 'docs_create_menu');

the get_stylesheet_directory_uri() function returns uri of document.
in case need absolute path, not uri.

clarification:
uri: thing type browser.
absolute path: path root directory of webspace / server.

so 'docs' folder inside theme's directory do
$path = get_template_directory()."/docs/"

i hope helped, sebastian


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