Split a text by its paragraphs

This is how you can split a text by its natural paragraphs using line break characters backslash r and backslash n (\r\n). This script looks for three following line breaks and add it to an array for other actions. This code is ripped out of its context in a Drupal module.

<?php
    $node = node_load($nid);
    $body = $node->body;

    $body = strip_tags($body);

    preg_match_all("/[\r\n]/", $body, $subs, PREG_OFFSET_CAPTURE);

    foreach ($subs[0] as $key => $value) {
        if ($value[1] == (($subs[0][$key+1][1]) - 1) AND $value[1] == (($subs[0][$key+2][1]) - 2)) {
          $limits[] = $value[1];
        }
    }

    $limits[] = strlen($body);

    $from = 0;
    $paragraphs = array();
   
    foreach ($limits as $r => $value) {
        $paragraphs[] = trim(substr($body, $from, ($value-$from)));
        $from = $value;
    }
   
   ?>
   <pre>
   <?php
       print_r($paragraphs);
   ?>
   </pre>
   <?php
?>

And here is a ready to go function

<?php
/**
 * Split text into natural paragraphs by tripple newline
 *
 * @param string $body
 * @return array
 */
function _get_paragraphs($body) {
 
    $paragraphs = array();
   
    preg_match_all("/[\r\n]/", $body, $subs, PREG_OFFSET_CAPTURE);

    foreach ($subs[0] as $key => $value) {
        if ($value[1] == (($subs[0][$key+1][1]) - 1) AND $value[1] == (($subs[0][$key+2][1]) - 2)) {
          $limits[] = $value[1];
        }
    }

    $limits[] = strlen($body);

    $from = 0;
    foreach ($limits as $r => $value) {
        $paragraphs[] = trim(substr($body, $from, ($value-$from)));
        $from = $value;
    }
   
    return $paragraphs;
}
?>
Knowledge keywords: 
regular expression
strings