Retrieve Path of admin.php

You can use admin_url() function for wp-admin.css file and ABSPATH for admin.php.

$admin_php_path = ABSPATH . '/wp-admin/admin.php';
$admin_css_url = admin_url( 'css/wp-admin.css' );

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)