Php 如何在下面的动态下拉菜单中插入这些值

我有一个动态下拉菜单，显示数字1-10中的每个值：

$min_year = 1;
$max_year = 10;
$years = range($min_year, $max_year); // returns array with numeric values of 1900 - 2012
$durationHTML = '';
$durationHTML .= '<select name="duration" id="durationDrop">'.PHP_EOL; 
$durationHTML .= '<option value="">Please Select</option>'.PHP_EOL;  
foreach ($years as $year) {
    $durationHTML .= "<option>$year</option>".PHP_EOL;  // if no value attribute, value will be whatever is inside option tag, in this case, $year
}
$durationHTML .= '</select>';

我的问题是，如何动态显示上述值

更新：

$min_year = 1;
$max_year = 10;
$years = range($min_year, $max_year); // returns array with numeric values of 1900 - 2012
$durationHTML = '';
$durationHTML .= '<select name="duration" id="durationDrop">'.PHP_EOL; 
$durationHTML .= '<option value="">Please Select</option>'.PHP_EOL;  

for($i = 0; $i < sizeof($years); $i++)
{
  $current_year = $years[$i];
  $durationHTML .= "<option>{$current_year}</option";
  if($i != (sizeof($years) - 1 )) //So you don't try to grab 11 because it doesn't exist.
  {
    $next_year = $years[$i+1];
    $durationHTML .= "<option>{$current_year}/{$next_year}</option>";
  }
}

$durationHTML .= '</select>'; 

---

可能有几种方法可以做到这一点

最简单的方法是将foreach循环更改为简单的for循环，然后获取下一个值并使用它形成分数。我这样做是为了更容易阅读，但是您不需要将当前年和下一年存储在变量中，您可以直接从数组中回显它们

for($i = 0; $i < sizeof($years); $i++)
{
  $current_year = $years[$i];
  echo "<option>{$current_year}</option";
  if($i != (sizeof($years) - 1 )) //So you don't try to grab 11 because it doesn't exist.
  {
    $next_year = $years[$i+1];
    echo "<option>{$current_year}/{$next_year}</option>";
  }
}

for（$i=0；$iecho“{$current_year}这样的东西应该适合你

$min_year = 1;
$max_year = 10;
$years = range($min_year, $max_year); // returns array with numeric values of 1900 - 2012
$durationHTML = '';
$durationHTML .= '<select name="duration" id="durationDrop">'.PHP_EOL; 
$durationHTML .= '<option value="">Please Select</option>'.PHP_EOL;  
foreach ($years as $year) {
    $durationHTML .= "<option>$year</option>".PHP_EOL;  
    if ($year != $max_year) {
         $nextYear = $year + 1;
         $durationHTML .= "<option>$year / $nextYear</option>".PHP_EOL;              
    }
}
$durationHTML .= '</select>';

$min_year=1；
$max_year=10；
$years=范围（$min_year，$max_year）；//返回数值为1900-2012的数组
$durationHTML=''；
$durationHTML.=''.PHP\u EOL；
$durationHTML.='请选择'.PHP\u EOL；
foreach（$年为$年）{
$durationHTML.=“$year”.PHP\u EOL；
如果（$year！=$max\u year）{
$nextYear=$year+1；
$durationHTML.=“$year/$nextYear”。PHP_EOL；
}
}
$durationHTML.=''；

for($i = 0; $i < sizeof($years); $i++)
{
  $current_year = $years[$i];
  echo "<option>{$current_year}</option";
  if($i != (sizeof($years) - 1 )) //So you don't try to grab 11 because it doesn't exist.
  {
    $next_year = $years[$i+1];
    echo "<option>{$current_year}/{$next_year}</option>";
  }
}

$min_year = 1;
$max_year = 10;
$years = range($min_year, $max_year); // returns array with numeric values of 1900 - 2012
$durationHTML = '';
$durationHTML .= '<select name="duration" id="durationDrop">'.PHP_EOL; 
$durationHTML .= '<option value="">Please Select</option>'.PHP_EOL;  
foreach ($years as $year) {
    $durationHTML .= "<option>$year</option>".PHP_EOL;  
    if ($year != $max_year) {
         $nextYear = $year + 1;
         $durationHTML .= "<option>$year / $nextYear</option>".PHP_EOL;              
    }
}
$durationHTML .= '</select>';