t3lib/class.t3lib_parsehtml_proc.php line533 块注释

                    // Convert abs to rel url
                 if ($imgSplit[$k])    {
                    $attribArray=$this->get_tag_attributes_classic($imgSplit[$k],1);
                    $absRef = trim($attribArray['src']);
                    if (t3lib_div::isFirstPartOfStr($absRef,$siteUrl))    {
                        $attribArray['src'] = $this->relBackPath.substr($absRef,strlen($siteUrl));
                        if (!isset($attribArray['alt']))    $attribArray['alt']='';        // Must have alt-attribute for XHTML compliance.
                        $imgSplit[$k]='';
                    }
                }