how can we integrate html and php in the given code.
<form action="login.php" method="post" >
<tr>
<td><span class="xxxx">User Name</span></td>
<td><span class="xxxx"><input type="text" name="username" id="username" size="20" value="default value"></span></td>
</tr>
<tr>
<td><span class="xxxx">Password</span></td>
<td><span class="xxxx"><input type="password" name="password" id="password" size="20"></span></td>
</tr>
<tr>
......
</form>