如何判斷字串的年月日？（問題更新）

Question

$rangeY = range(1950, 2015);
    $rangeM = range(1, 12);
    $rangeD = range(1, 31);
    
<select class="profile_birthday_select" name="yy" id="yy">
                <?foreach ($rangeY as $key) {?>
                  <option value="male"><?=$key;?></option>
                <?}?>
              </select>
              <select class="profile_birthday_select" name="mm" id="mm">
                <?foreach ($rangeM as $key) {?>
                  <option value="male"><?=$key;?></option>
                <?}?>
              </select>
              <select class="profile_birthday_select" name="dd" id="dd">
                <?foreach ($rangeD as $key) {?>
                  <option value="male"><?=$key;?></option>
                <?}?>
              </select>

我想判斷該用戶的個別年月日
但是過來的數據會是這樣的格式：String
且是 YYYY-MM-DD

<?=$data->{'birthday'};?>

這樣我要怎麼個別取出YYYY、MM、ＤＤ？

Answer 1

$date = explode('-','YYYY-MM-DD');
var_dump($date);

---

range