PHP version of Ruby's to_sentence method. Uses option array as param.

to_sentence.php

/**
 * PHP Equivilent to Ruby's to_sentence method.
 * Example: 
 * to_sentence(array('a', 'b')) = a and b
 * to_sentence(array('a', 'b', 'c')) = a, b, and c
 * @param  array() $items   array of items to split
 * @param  array() $options array of options: 
 *         conjunction = conjunction string (default ' and ')
 *         seperator = seperator string (default ', ')
 *         conjunctionSeperator = conjunction seperator (default ',')
 */

function to_sentence($items, $options = null ) 
{
	$defaults = array('conjunction' => ' and ', 
					  'seperator' => ', ',
					  'conjunctionSeperator' => ',');
	
	if(is_array($options)) {
		$options = array_merge($defaults, $options);
	} else {
		$options = $defaults;
	}
	
	if(is_array($items)) {
		$lastItem = array_pop($items);
 
		if(count($items) === 0) {
			return $lastItem;
		}
		if(count($items) >= 2 && $options['conjunctionSeperator']) {
			$options['conjunction'] = $options['conjunctionSeperator'] . $options['conjunction'];
		}
		$items = implode($options['seperator'], $items);
		$items = $items . $options['conjunction'] . $lastItem;
	}
 
	return $items;
}