将每行数据库放在重复模式的两个不同div中

I created a comment system for my site, and I need a good way to see the end of the previous comment and start of the next one. To do that , I tought I'd place each row into two different divs that have slightly different background tone. Get it? Like this:

Row 1

row 2

row 3

etc..

$query = $db->query("SELECT * FROM comments WHERE post_id='$id'");
while($row = $query->fetch_object()):
    echo "<h5>".$row->name."</h5><br>";
    $strip_comment = strip_tags($row->comment);
    $strip_comment_slashes = stripslashes($strip_comment);
        echo "<blockquote>".$strip_comment_slashes."</blockquote>";

You don't have to change your rendered markup for this, you can style every other element with CSS. That way the markup remains as just markup and not styling.

So if your markup is something like this:

<div id="container">
    <div>content 1</div>
    <div>content 2</div>
    <div>content 3</div>
    <div>content 4</div>
    <div>content 5</div>
    <div>content 6</div>
</div>

Then you can style every other child div:

div#container div:nth-child(odd)
{
    background-color: grey;
}

Example

Uss the majical powers of CSS:

#comments tr:nth-child(odd){
  background-color:#fff;
};

#comments tr:nth-child(even){
  background-color:#ccc;
};

More resources:

http://www.w3schools.com/cssref/sel_nth-child.asp

http://css-tricks.com/how-nth-child-works/