diff --git a/README.md b/README.md
index 281f468..07c52ad 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ Installation
 ------------
 1. Download the latest yourls-ldap-plugin.
 1. Copy the plugin folder into your user/plugins folder for YOURLS.
-1. Set up the parameters for yourls-ldap-plugin in YOURLS configuration (see below).
+1. Set up the parameters for yourls-ldap-plugin in YOURLS configuration user/config.php (see below).
 1. Activate the plugin with the plugin manager in the admin interface.
 
 Usage
@@ -16,10 +16,11 @@ When yourls-cas-plugin is enabled and user was not successfuly authenticated usi
 
 Configuration
 -------------
-  * `LDAP_HOST` LDAP host name, IP or URL. You can use ldaps://host for LDAP with TLS
-  * `LDAP_PORT` LDAP server port - often 389 or 636 for TLS (LDAPS)
-  * `LDAP_BASE` Base DN (location of users)
-  * `LDAP_USERNAME_FIELD` (optional) LDAP field name in which username is store
+
+  * define( 'LDAPAUTH_HOST', 'ldaps://ldap.domain.com' ) LDAP host name, IP or URL. You can use ldaps://host for LDAP with TLS
+  * define( 'LDAPAUTH_PORT', '636' ) LDAP server port - often 389 or 636 for TLS (LDAPS)
+  * define( 'LDAPAUTH_BASE', 'dc=domain,dc=com' ) Base DN (location of users)
+  * define( 'LDAPAUTH_USERNAME_FIELD', 'uid') (optional) LDAP field name in which username is store
 
 Troubleshooting
 ---------------
diff --git a/plugin.php b/plugin.php
index bcf06ed..f3ba401 100644
--- a/plugin.php
+++ b/plugin.php
@@ -13,12 +13,12 @@ Author URI: http://k3a.me
 if( !defined( 'YOURLS_ABSPATH' ) ) die();
 
 // returns true if the environment is set up right
-function ldap_environment_check() {
+function ldapauth_environment_check() {
 	$required_params = array(
-		'LDAP_HOST', // ldap host
-		//'LDAP_PORT', // ldap port
-		'LDAP_BASE', // base ldap path
-		//'LDAP_USERNAME_FIELD', // field to check the username against
+		'LDAPAUTH_HOST', // ldap host
+		//'LDAAUTHP_PORT', // ldap port
+		'LDAPAUTH_BASE', // base ldap path
+		//'LDAPAUTH_USERNAME_FIELD', // field to check the username against
 	);
 
 	foreach ($required_params as $pname) {
@@ -29,42 +29,42 @@ function ldap_environment_check() {
 		}
 	}
 
-	if ( !defined( 'LDAP_PORT' ) )
-		define( 'LDAP_PORT', 389 );
+	if ( !defined( 'LDAPAUTH_PORT' ) )
+		define( 'LDAPAUTH_PORT', 389 );
 
-	if ( !defined( 'LDAP_USERNAME_FIELD' ) )
-		define( 'LDAP_USERNAME_FIELD', 'uid' );
+	if ( !defined( 'LDAPAUTH_USERNAME_FIELD' ) )
+		define( 'LDAPAUTH_USERNAME_FIELD', 'uid' );
 
-	if ( !defined( 'LDAP_ALL_USERS_ADMIN' ) )
-		define( 'LDAP_ALL_USERS_ADMIN', true );
+	if ( !defined( 'LDAPAUTH_ALL_USERS_ADMIN' ) )
+		define( 'LDAPAUTH_ALL_USERS_ADMIN', true );
 
-	global $ldap_authorized_admins;
-	if ( !isset( $ldap_authorized_admins ) ) {
-		if ( !LDAP_ALL_USERS_ADMIN ) {
-			error_log('Undefined $ldap_authorized_admins');
+	global $ldapauth_authorized_admins;
+	if ( !isset( $ldapauth_authorized_admins ) ) {
+		if ( !LDAPAUTH_ALL_USERS_ADMIN ) {
+			error_log('Undefined $ldapauth_authorized_admins');
 		}
-		$ldap_authorized_admins = array();
+		$ldapauth_authorized_admins = array();
 	}
 
 	return true;
 }
 
 
-yourls_add_filter( 'is_valid_user', 'ldap_is_valid_user' );
+yourls_add_filter( 'is_valid_user', 'ldapauth_is_valid_user' );
 
 // returns true/false
-function ldap_is_valid_user( $value ) {
+function ldapauth_is_valid_user( $value ) {
 	// doesn't work for API...
 	if (yourls_is_API())
 		return $value;
 
 	@session_start();
 
-	if ( isset( $_SESSION['LDAP_AUTH_USER'] ) ) {
+	if ( isset( $_SESSION['LDAPAUTH_AUTH_USER'] ) ) {
 		// already authenticated...
-		$username = $_SESSION['LDAP_AUTH_USER'];
-		if ( ldap_is_authorized_user( $username ) ) {
-			yourls_set_user( $_SESSION['LDAP_AUTH_USER'] );
+		$username = $_SESSION['LDAPAUTH_AUTH_USER'];
+		if ( ldapauth_is_authorized_user( $username ) ) {
+			yourls_set_user( $_SESSION['LDAPAUTH_AUTH_USER'] );
 			return true;
 		} else {
 			return $username.' is not admin user.';
@@ -72,28 +72,28 @@ function ldap_is_valid_user( $value ) {
 	} else if ( isset( $_REQUEST['username'] ) && isset( $_REQUEST['password'] )
 			&& !empty( $_REQUEST['username'] ) && !empty( $_REQUEST['password']  ) ) {
 
-		if ( !ldap_environment_check() ) {
+		if ( !ldapauth_environment_check() ) {
         	die( 'Invalid configuration for YOURLS LDAP plugin. Check PHP error log.' );
     	}	
 
 		// try to authenticate
-		$ldapConnection = ldap_connect(LDAP_HOST, LDAP_PORT);
-		if (!$ldapConnection) Die("Cannot connect to LDAP " . LDAP_HOST);
-		$searchDn = ldap_search($ldapConnection, LDAP_BASE, LDAP_USERNAME_FIELD . "=" . $_REQUEST['username'] );
+		$ldapConnection = ldap_connect(LDAPAUTH_HOST, LDAPAUTH_PORT);
+		if (!$ldapConnection) Die("Cannot connect to LDAP " . LDAPAUTH_HOST);
+		$searchDn = ldap_search($ldapConnection, LDAPAUTH_BASE, LDAPAUTH_USERNAME_FIELD . "=" . $_REQUEST['username'] );
 		if (!$searchDn) return $value;
 		$searchResult = ldap_get_entries($ldapConnection, $searchDn);
 		if (!$searchResult) return $value;
 		$userDn = $searchResult[0]['dn'];
 		if (!$userDn) return $value;	
-		$ldap_login = @ldap_bind($ldapConnection, $userDn, $_REQUEST['password']);
+		$ldapSuccess = @ldap_bind($ldapConnection, $userDn, $_REQUEST['password']);
 		@ldap_close($ldapConnection);
 
 		// success?
-		if ($ldap_login)
+		if ($ldapSuccess)
 		{
-			$username = $searchResult[0][LDAP_USERNAME_FIELD][0];
+			$username = $searchResult[0][LDAPAUTH_USERNAME_FIELD][0];
 			yourls_set_user($username);
-			$_SESSION['LDAP_AUTH_USER'] = $username;
+			$_SESSION['LDAPAUTH_AUTH_USER'] = $username;
 			return true;
 		}
 	}
@@ -101,16 +101,16 @@ function ldap_is_valid_user( $value ) {
 	return $value;
 }
 
-function ldap_is_authorized_user( $username ) {
+function ldapauth_is_authorized_user( $username ) {
 	// by default, anybody who can authenticate is also
 	// authorized as an administrator.
-	if ( LDAP_ALL_USERS_ADMIN ) {
+	if ( LDAPAUTH_ALL_USERS_ADMIN ) {
 		return true;
 	}
 
 	// users listed in config.php are admin users. let them in.
-	global $ldap_authorized_admins;
-	if ( in_array( $username, $ldap_authorized_admins ) ) {
+	global $ldapauth_authorized_admins;
+	if ( in_array( $username, $ldapauth_authorized_admins ) ) {
 		return true;
 	}
 
@@ -118,9 +118,9 @@ function ldap_is_authorized_user( $username ) {
 	return false;
 }
 
-yourls_add_action( 'logout', 'ldap_logout_hook' );
+yourls_add_action( 'logout', 'ldapauth_logout_hook' );
 
-function ldap_logout_hook( $args ) {
-	unset($_SESSION['LDAP_AUTH_USER']);
+function ldapauth_logout_hook( $args ) {
+	unset($_SESSION['LDAPAUTH_AUTH_USER']);
 	setcookie('PHPSESSID', '', 0, '/');
 }