Importing bits and pieces

This is the initial import based on a few files I had around.

includes/form/modifiers.inc.php

@@ -0,0 +1,26 @@
+<?php
+
+class Modifier_TrimString
+	implements FieldModifier
+{
+	private $removeDuplicateSpaces;
+
+
+	public function __construct( $removeDuplicateSpaces = true )
+	{
+		$this->removeDuplicateSpaces = $removeDuplicateSpaces;
+	}
+
+
+	public function replace( $value )
+	{
+		if ( $value === null ) {
+			return '';
+		}
+		$value = trim( $value );
+		if ( $this->removeDuplicateSpaces ) {
+			$value = preg_replace( '/\s\s+/' , ' ' , $value );
+		}
+		return $value;
+	}
+}