How do I read values (PHP defined constants) from wp-config.php?

Question

I need to get username, password etc from the wp-config file to connect to a custom PDO database.

Currently I have another file where I have this info, but I would like to only use the wp-config.

So how can I read the different properties of wp-config?

Answer 1

I have even defined my own constants in in wp-config.php and managed to retrieve them in theme without any includes.

wp-config.php

define('DEFAULT_ACCESS', 'employee'); 

functions.php

echo "DEFAULT_ACCESS :".DEFAULT_ACCESS; 

outputs DEFAULT_ACCESS :employee

Answer 2

Here's some same code.

// ...Call the database connection settings require( path to /wp-config.php );  // ...Connect to WP database $dbc = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD); if ( !$dbc ) {     die( 'Not Connected: ' . mysql_error()); } // Select the database $db = mysql_select_db(DB_NAME); if (!$db) {     echo "There is no database: " . $db; }  // ...Formulate the query $query = "     SELECT *     FROM `wp_posts`     WHERE `post_status` = 'publish'     AND `post_password` = ''     AND `post_type` = 'post'     ";  // ...Perform the query $result = mysql_query( $query );  // ...Check results of the query and terminate the script if invalid results if ( !$result ) {     $message = '<p>Invalid query.</p>' . "\n";     $message .= '<p>Whole query: ' . $query ."</p> \n";     die ( $message ); }  // Init a variable for the number of rows of results $num_rows = mysql_num_rows( $result );  // Print the number of posts echo "$num_rows Posts";  // Free the resources associated with the result set if ( $result ) {     mysql_free_result( $result );     mysql_close(); }