designoir

<?php

/**
 * class Entitify
 * Copyright (C) 2009  Dao Gottwald  <dao at design-noir.de>
 * 
 * Licensed under the terms of the GNU Lesser General Public License:
 *   http://www.opensource.org/licenses/lgpl-license.php
 *
 * @version  1.0.2
 */

require_once 'Preprocess.php';

class Entitify extends Preprocess {
    private
        $entities_from = array(' -- '),
        $entities_to = array(' &#8211; ');
    
    public function __construct (array $entities = array()) {
        foreach ($entities as $plain => $ent) {
            $this->entities_from[] = $plain;
            $this->entities_to[] = $ent;
        }
    }
    
    public function run ($text) {
        $this->text =& $text;
        $this->_escape_init();
        $this->_escape_comments_cdata();
        $text = preg_replace ('~&(?=[^;]{7}|[^;]{0,6}&)~', '&amp;', $text);
        $this->_escape_content ('pre', 'code', 'samp', 'kbd', 'textarea');
        $text = preg_replace_callback ('~>.*?<~s', array ($this, '_replace'), '>'.$text.'<');
        $text = substr ($text, 1, -1);
        $this->_escape_fin();
        return $text;
    }
    private function _replace (array $matches) {
        $matches[0] = str_replace ($this->entities_from, $this->entities_to, $matches[0]);
        $matches[0] = preg_replace ('~ \.{3,}~', '&#160;&#8230;', $matches[0]);
        $matches[0] = preg_replace ('~\.{3,}~', '&#8230;', $matches[0]);
        return $matches[0];
    }
}

?>

<?php

ob_start (array (new Entitify (array ('---' => '&#8212;')), 'run'));

?>
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