<?php
namespace CustomTags;
/**
* Inspired by a smarty plugin.
* http://www.andrefiedler.de/smartyplugins/outputfilter.highlight_search_words.txt
* Smarty plugin
* Author: André Fielder < mail [at] andrefiedler [dot] de >
* -------------------------------------------------------------
* File: outputfilter.highlight_search_words.php
* Type: outputfilter
* Name: highlight_search_words
* Purpose: Highlights words which were searched true an
* search engine below. A css class named searchWords
* must be available.
* -------------------------------------------------------------
*
* @version 1.0
* @copyright 2005, André Fiedler
*/
function ct_search_highlight($tags, $source)
{
// the search engine and incoming var name
$search_engines = array(
'google' => 'q',
'yahoo' => 'p',
'lycos' => 'query',
'altavista' => 'q',
'alltheweb' => 'q',
'excite' => 'search',
'msn' => 'q'
);
$url = parse_url($_SERVER['HTTP_REFERER']);
// loop through all the tags and capture the block source and the
// replacement value so they can be bulk replaced
$replacements = array();
foreach ($tags as $tag)
{
// loop the search engine list
foreach($search_engines as $engine_name => $var_name)
{
// search for a match of the current search engine name against the url host
if(preg_match('/('.$engine_name.')/i', $url['host']))
{
// loop the words and replace the words with a highlighted query
parse_str($url['query'], $query_vars);
$words = explode(' ', urldecode($query_vars[$var_name]));
foreach($words as $k => $word)
{
if(trim($word) != '')
{
$pattern[$k] = "/((<[^>]*)|$word)/ie";
$replace[$k] = '"\2"=="\1"? "\1":"<span class=\"searchWords\">\1</span>"';
}
}
$tag['content'] = preg_replace($pattern, $replace, $tag['content']);
}
}
$replacements[$tag['tag']] = $tag['content'];
}
return strtr($source, $replacements);
}
// this signals that the tag should be processed as a collection, meaning
// that the argument supplied to the function is an array of tags and not
// a single tag. The collected tags will be processed at the end of the parse.
$collect = true;
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