插入HTML标记并从php变量中删除逗号

我有如下PHP变量：

$biling_cycles = 'Monthly,Annually';

我希望它是：

$biling_cycles = '<span> Monthly, </span> <span> Annually </span>';

---

您可以按如下方式进行操作：

$billing_cycles = 'Monthly, Annually';
$temp = '';
foreach (explode(', ', $billing_cycles) as $key => $value) {
    $temp .= "<span> $value </span>,";
}
$biling_cycles = rtrim($temp, ','); // removes trainling comma

echo $billing_cycles;

结果是：每月、每年

遵循以下简单步骤：

输出：

---

以下代码适用于我：

<?php
 $biling_cycles = 'Monthly, Annually';
 $cycles = explode(', ', $biling_cycles);
 foreach($cycles as $cycle):
  echo '<span>';
  echo $cycle;
  echo "</span>";
 endforeach;
?>

<span> Monthly </span>,<span> Annually </span>

<?php
 $biling_cycles = 'Monthly, Annually';
 $cycles = explode(', ', $biling_cycles);
 foreach($cycles as $cycle):
  echo '<span>';
  echo $cycle;
  echo "</span>";
 endforeach;
?>