function process_style(&$html)
{
if (preg_match('#^(.*<style[^>]*>)(.*?)(</style>.*)$#is', $html, $matches)) {
process_style($matches[3]);
$html = $matches[1] . process_style_content($matches[2]) . $matches[3];
}
}
function process_style(&$html)
{
$styles = array();
if (preg_match('#^(.*)(<style[^>]*>)(.*?)(</style>)(.*)$#is', $html, $matches)) {
$styles = array_merge(array($matches[2] . process_style_content($matches[3]) . $matches[4]), process_style($matches[5]));
$html = $matches[1] . $matches[5];
}
return $styles;
}
function html2xhtml($html)
{
process_pagebreak_commands($html);
// Remove SCRIPT tags from the page being processed, as script content may
// mess the firther html-parsing utilities
$html = process_script($html);
// Remove STYLE tags for the same reason and store them in the temporary variable
// later they will be added back to HEAD section
$styles = process_style($html);
// Convert HTML character references to their Unicode analogues
process_character_references($html);
remove_comments($html);
fix_attrs_spaces($html);
$html = quote_attrs($html);
$html = escape_attrs_entities($html);
$html = lowercase_tags($html);
$html = lowercase_closing_tags($html);
$html = fix_closing_tags($html);
$html = close_tag("area", $html);
$html = close_tag("base", $html);
$html = close_tag("basefont", $html);
$html = close_tag("br", $html);
$html = close_tag("col", $html);
$html = close_tag("embed", $html);
$html = close_tag("frame", $html);
$html = close_tag("hr", $html);
$html = close_tag("img", $html);
$html = close_tag("input", $html);
$html = close_tag("isindex", $html);
$html = close_tag("link", $html);
$html = close_tag("meta", $html);
$html = close_tag("param", $html);
$html = make_attr_value("checked", $html);
$html = make_attr_value("compact", $html);
$html = make_attr_value("declare", $html);
$html = make_attr_value("defer", $html);
$html = make_attr_value("disabled", $html);
$html = make_attr_value("ismap", $html);
$html = make_attr_value("multiple", $html);
$html = make_attr_value("nohref", $html);
$html = make_attr_value("noresize", $html);
$html = make_attr_value("noshade", $html);
$html = make_attr_value("nowrap", $html);
$html = make_attr_value("readonly", $html);
$html = make_attr_value("selected", $html);
$html = process_html($html);
$html = process_body($html);
$html = process_head($html);
$html = process_p($html);
$html = escape_amp($html);
$html = escape_lt($html);
$html = escape_gt($html);
$html = escape_textarea_content($html);
process_tables($html, 0);
process_lists($html, 0);
process_deflists($html, 0);
process_selects($html, 0);
$html = fix_tags($html);
$html = fix_attrs($html);
$html = insert_styles($html, $styles);
return $html;
}
