这个怎么样:
$counter = 0;
while ($subject = mysql_fetch_array($subject_qry))
{
if ($counter % 2 == 0)
{
$output = "<div class=\"left\" id=\"{$subject['id']}\"></div>";
}
else
{
$output = "<div class=\"right\" id=\"{$subject['id']}\"></div>";
}
// do something with $output here...
$counter ++;
}
或者您可以使用布尔值实现相同的结果:
$left = true;
while ($subject = mysql_fetch_array($subject_qry))
{
if ($left)
{
$output = "<div class=\"left\" id=\"{$subject['id']}\"></div>";
}
else
{
$output = "<div class=\"right\" id=\"{$subject['id']}\"></div>";
}
// do something with $output here...
$left = !$left;
}