diff --git a/src/SettingsWriter.php b/src/SettingsWriter.php
index 182d29d..6bc51d7 100644
--- a/src/SettingsWriter.php
+++ b/src/SettingsWriter.php
@@ -81,18 +81,28 @@ class SettingsWriter
 		
 		foreach ($settings as $key => $value)
 		{
-			fwrite( $this->handle, "$indent'$key' =>" );
+			if (!is_numeric($key)) $key = "'$key'";
+			fwrite( $this->handle, "$indent$key =>" );
 
 			// recursive walk through child arrays
 			if ( is_array( $value ) )
 			{
 				fwrite( $this->handle, "\n{$indent}[\n" );
-				$this->write( $value );
+				if (!empty($value)) $this->write( $value );
 				fwrite( $this->handle, "$indent]" );
 			}
 			else
 			{
-				fwrite( $this->handle, " '$value'" );
+				switch (gettype($value))
+				{
+				case 'NULL':
+					$value = 'null'; break;
+				case 'boolean':
+					$value = ($value) ? 'true' : 'false'; break;
+				case 'string':
+					$value = "'$value'"; break;
+				}
+				fwrite( $this->handle, " $value" );
 			}
 
 			if ( next($settings) )