html 在php中echo html 时引号的使用

<?php
foreach ($unpinpointed as $user) {
echo "<div class='list-group-item'>
<div class='pull-right'>
<button style='margin-right: 15px' type='button' class='btn btn-info' aria-label='Envelope' data-userid=$user[id] data-email=$user[email] ></button>
<a href='tel:".$user['phonenumber']."'>
<button type='button' class='btn btn-info' aria-label='Earphone'>
<span class='glyphicon glyphicon-earphone' aria-hidden='true'></span>
<span hidden>$user[phonenumber]</span>
</button>
</a>
</div>";
}
?>