用php开发wap2.0的基本格式是什么？
<?php
$s="utf-8";
echo(" <?xml version=\"1.0\" encoding=\"".$s."\"?>\n"); ?>
<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<?php
$s="utf-8";
echo(" <?xml version=\"1.0\" encoding=\"".$s."\"?>\n"); ?>
<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
header('Content-type: application/vnd.wap.xhtml+xml');?>
<?php echo '<?xml version="1.0" encoding="utf-8"?>';
?>
<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">