Demo
年月日
PHP&CSS
<div class="php_bir_select4">
<?php
// 使用している変数名
// $selected_year, $selected_month, $selected_day, $d, $this_year, $start_year
// $birth_year, $birth_month, $birth_day, $i, $y_selected, $m_selected, $d_selected
/* 既定値を設定 */
$selected_year = "2020";//年
$selected_month = "4";//月
$selected_day = "10";//日
/*----------------------------------------*/
$d = date_create();
$this_year = date_format($d, "Y");
$start_year = $this_year - 100;
$birth_year = $birth_month = $birth_day = "<option value=\"\">--</option>";
for($i = $start_year; $i <= $this_year; $i++){
$y_selected = "";
if($i == $selected_year){
$y_selected = " selected";
}
$birth_year .= "<option value=\"{$i}\"{$y_selected}>{$i}</option>";
}
for($i = 1; $i <= 12; $i++){
$i = sprintf('%02d', $i);
$m_selected = "";
if($i == $selected_month){
$m_selected = " selected";
}
$birth_month .= "<option value=\"{$i}\"{$m_selected}>{$i}</option>";
}
for($i = 1; $i <= 31; $i++){
$i = sprintf('%02d', $i);
$d_selected = "";
if($i == $selected_day){
$d_selected = " selected";
}
$birth_day .= "<option value=\"{$i}\"{$d_selected}>{$i}</option>";
}
echo "<select name=\"birth_year\">{$birth_year}</select>年<select name=\"birth_month\">{$birth_month}</select>月<select name=\"birth_day\">{$birth_day}</select>日";
?>
</div>
.php_bir_select4 select{
width: 4rem;
outline: none;
padding: 0.3rem 0;
margin: 0 0.2rem 0 0.5rem;
border: 1px solid #ccc;
}
.php_bir_select4 select:first-child{
margin-left: 0rem;
}
