问PHP显示MySQL表

EN

$sql="SELECT * FROM billing ";
$rs=mysql_query($sql,$conn);
$fields_num = mysql_num_fields($rs);
echo "<table border='1'><tr>";
for($i=0; $i<$fields_num; $i++) {
    $field = mysql_fetch_field($rs);
    echo "<td>{$field->name}</td>";
}
echo "</tr>\n";
while($row = mysql_fetch_row($rs)) {
    echo "<tr>";
    foreach($row as $index => $data) {
       echo "<td>".$data."</td>";
    }
    echo "</tr>\n";
}

while($row = mysql_fetch_row($rs)) {
    echo "<tr>";
    for($i=0; $i<$fields_num; $i++) {
        echo "<td>{$row[$i]}</td>";
    }
    echo "</tr>\n";
}