Php 如何使数组中的第一个元素处于活动状态

好的，我有这个数组，我需要循环

 <?php foreach($classes as $class){ ?>

---

当然可能有更好的方法（取决于你的班级结构，…）

for（$i=0；i
<li class="active"><span class="l"></span><a href="#">Standard Class</a><span class="r"></span></li>
<li><span class="l"></span><a href="#">Business Class</a><span class="r"></span></li>
<li><span class="l"></span><a href="#">Premium</a><span class="r"></span></li>

Array ( 
[0] => Array ( 
   [class] => Standard )
[1] => Array ( 
   [class] => Business ) 
[2] => Array ( 
   [class] => Premium ) ) 

for($i = 0; i < count($classes); i++)
{
    echo "<li ";
    if($i == 0)
    {
        echo "class=\"active\"";
        // first one
    }
    echo "><span.....";
}