gistfile1.php

<?php
class Toggle {
	
	private $config;
	private $temp;
	
	public function __construct() {
		$args = func_get_args();
		if (empty($args)) {
			throw new Exception('Toggle requires an array or an argument list.');
		} else if (is_array($args[0])) {
			$config = $args[0];
		} else {
			$config = $args;
		}
		
		$this->config = $config;
	}
	
	public function get() {
		if (empty($this->temp)) {
			$this->temp = $this->config;
		}
		return array_shift($this->temp);
	}
	
	public function __toString() {
		return $this->get();
	}
	
}

gistfile2.php

<?php
$my_toggle = new Toggle('odd', 'even');

$my_table = "<table>\n";
for ($x = 1; $x <= 10; $x++) {
    $row_class = $my_toggle->get();
    $my_table .= <<<EOT
        <tr class="$row_class">
            <td>
            a table cell...
            </td>
        </tr>\n
EOT;
}
$my_table = "</table>\n";

echo $my_table;