基于计数动态设置

Question

我的网站上有 masonry 部分，根据部分中的项目数量，每个部分的宽度不同。现在我手动设置每个项目的宽度。有没有更好的方法可以做到这一点？

if($postCount == 1){$width = array("1-1");}
if($postCount == 2){$width = array("2-3","1-3");}
if($postCount == 3){$width = array("1-3","1-3","1-3");}
if($postCount == 4){$width = array("2-3","1-3","2-3","1-3");}
if($postCount == 5){$width = array("2-3","1-3","1-3","1-3","1-3");}
if($postCount == 6){$width = array("1-3","1-3","1-3","1-3","1-3","1-
3");}
if($postCount == 7){$width = array("2-3","1-3","1-3","1-3","1-3","2-
3","1-3");}
if($postCount == 8){$width = array("2-3","1-3","1-3","1-3","1-3","1-3","1-3","1-3");}