<?php $sel = isset($_POST[‘select’]) ? $_POST[‘select’] : ”; ?> <html> <form method=”post” action=”<?=$_SERVER[‘SCRIPT_NAME’];?>”> <select name=”select”> <option value=”a”<?= $sel === ‘a’ ? ‘ selected’ : ”; ?>>a</option> <option value=”b”<?= $sel === ‘b’ ? ‘ selected’ : ”; ?>>b</option> <option value=”c”<?= $sel === ‘c’ ? ‘ selected’ : ”; ?>>c</option> <option value=”d”<?= $sel === ‘d’ ? ‘ selected’ : ”; ?>>d</option> </select> <input type=”submit” name=”submit” value=”送る”> </form> </html>
参考サイト
https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q14106542769
