tags.php

	/**
	 * Constructor for the Tags class.
	 * @param mixed $tags String or array of tags
	 */
	public function __construct( $tags = array() )
	{
		if ( is_string( $tags ) && ( '' !== $tags ) ) {
			// dirrty ;)
			$rez = array( '\\"'=>':__unlikely_quote__:', '\\\''=>':__unlikely_apos__:' );
			$zer = array( ':__unlikely_quote__:'=>'"', ':__unlikely_apos__:'=>"'" );
			// escape
			$tagstr = str_replace( array_keys( $rez ), $rez, $tags );
			// match-o-matic
			preg_match_all( '/((("|((?<= )|^)\')\\S([^\\3]*?)\\3((?=[\\W])|$))|[^,])+/u', $tagstr, $matches );
			// cleanup
			$tags = array_map( 'trim', $matches[0] );
			//return new Tag( array( 'tag_text' => $term->term_display, 'tag_slug' => $term->term, 'id' => $term->id ) );
			$tags = preg_replace( array_fill( 0, count( $tags ), '/^(["\'])(((?!").)+)(\\1)$/'), '$2', $tags );
			// unescape
			$tags = str_replace( array_keys( $zer ), $zer, $tags );
		}

		// Turn each of the tags into a Tag
		array_walk( $tags, create_function('&$tag', 'return new Tag( array( "tag_text" => $tag ) );') );
		parent::__construct( $tags );

	}

tagsTest.php

<?php

require_once dirname( dirname( dirname( __FILE__ ) ) ) . DIRECTORY_SEPARATOR . 'phpunit_bootstrap.php';

class system_classes_TagsTest extends PHPUnit_Framework_TestCase
{
	public function setup()
	{
	}

	public function teardown()
	{
	}

	public function test_construct_tags()
	{
		// Construct tags from tag string
		$tags = new Tags('one, two, three');

		$this->assertType('Tags', $tags);
		$this->assertEquals(count($tags), 3);

		// Construct tags from tag array
		$tags = new Tags(array('one', 'two', 'three'));

		$this->assertType('Tags', $tags);
		$this->assertEquals(count($tags), 3);
	}
}
?>