PHP循环中的交替颜色行

如何在我的php循环中有一个交替的颜色行？

$num = mysql_num_rows($qPhysician);

$i=0;

while($i < $num)

{

    echo "<tr>";
    echo "<td>" . mysql_result($qPhysician,$i,"lastName") . "</td>";
    echo "<td>" . mysql_result($qPhysician,$i,"firstName") . "</td>";
    echo "</tr>";

    $i++;

}

我必须省略“<”和“>”对于“tr”和“td”,因为在这个问题中不允许这样做.

标签：php,while-loop,rows,alternating
来源： https://codeday.me/bug/20190716/1482564.html