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60 lines
1.9 KiB
60 lines
1.9 KiB
7 months ago
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<?php
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/**
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* This class highlights text matches a search string (keyword) in html based documents, without destroying html-tags.
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* This was necessary to scan database-entry written in html by keywords, and display them in another style.
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*
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* @name Highlighter
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* @description Advanced keyword highlighter, keep HTML tags safe.
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* @authors Bojidar Naydenov a.k.a Bojo (bojo2000@mail.bg) & Antony Raijekov a.k.a Zeos (dev@strategma.bg)
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* @version 2.1
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* @copyright GPL
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* @access public
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*
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* @package Framework
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*/
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class highlight
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{
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var $keyword;
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var $replacement;
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var $hightlight_bad_tags = array("A","IMG"); //add here more, if you want to filter them
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//constructor
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function highlight ($keyword=false,$replacement=false)
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{
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$this -> keyword = $keyword;
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$this -> replacement = $replacement;
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} //end func highlight
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//private
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function highlighter($matches)
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{
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//check for bad tags and keyword
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if (!in_array(strtoupper($matches[2]),$this -> hightlight_bad_tags))
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{
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//put template [replacement]
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$proceed = preg_replace("#\b(".$this -> keyword.")\b#si",str_replace("{keyword}",$matches[3],$this -> replacement),$matches[0]);
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}
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else //return as-is
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{
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$proceed = $matches[0];
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}
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return stripslashes($proceed);
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} //end func hightlighter
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//main api
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function process($text,$keyword = false,$replacement = false)
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{
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//if there are specific keyword/replacement given
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if($keyword != false) $this -> keyword = $keyword;
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if($replacement != false) $this -> replacement = $replacement;
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//process text array(&$this, 'method_name'),
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if((isset($this -> keyword)) AND (isset($this -> replacement)))
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return preg_replace_callback("#(<([A-Za-z]+)[^>]*[\>]*)*(".$this -> keyword.")\b(.*?)(<\/\\2>)*#si",array(&$this, 'highlighter'), $text);
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else
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return $text;
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} //end func process
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} // end class
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?>
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