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htdocs/lib/htmlpurifier/HTMLPurifier/AttrDef/CSS/URI.php

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            $uri = substr($uri, 1, $new_length - 1);

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        }

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        $keys   = array(  '(',   ')',   ',',   ' ',   '"',   "'");

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        $values = array('\\(', '\\)', '\\,', '\\ ', '\\"', "\\'");

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        $uri = str_replace($values, $keys, $uri);

 

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        $uri = $this->expandCSSEscape($uri);

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        $result = parent::validate($uri, $config, $context);

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        if ($result === false) return false;

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        // escape necessary characters according to CSS spec

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        // except for the comma, none of these should appear in the

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        // URI at all

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        $result = str_replace($keys, $values, $result);

 

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        // extra sanity check; should have been done by URI

 

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        $result = str_replace(array('"', "\\", "\n", "\x0c", "\r"), "", $result);

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        return "url($result)";

 

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        return "url(\"$result\")";

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    }

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