Simple nl2p (wraps things in paragraph tags as opposed to line breaks - nl2br)

nl2p.php

<?php

/**
 * This wraps blocks of text (delimited by \n) in p tags (similar to nl2br)
 * @author Scott Dover <sdover102@gmail.com>
 * @param str
 * @return str
 */
function nl2p($string) {
  /* Explode based on new-line */
	$string_parts = explode("\n", $string);

	/* Wrap each block in a p tag */
	$string = '<p>' . implode('</p><p>', $string_parts) . '</p>';	

	/* Return the string with empty paragraphs removed */
	return str_replace("<p></p>", '', $string);	
}

/**** my nl2p ***************/

/* wrap text ending with \n with <p> </p> tags */
function wrap_nl($string){
  //remove tabs/nl
  $prep0 = str_replace(array("\r\n" , "\n\r") , "\n" , utf8_decode($string));
  $prep1 = str_replace("\r" , "\n" , $prep0);
  //remove empty spaces
  $prep2 = preg_replace(array('/\n\s+/' , '/\s+\n/') , "\n" , trim($prep1));
  $result = '<p>'.str_replace("\n", "</p>\n<p>", $prep2).'</p>'; 
  return $result;
}

?>