2

このコードには、2 番目の while ループがコードを最初に実行するだけで、$row['id'] が値を取得しないようにするという問題があります。これでどこが間違っていたのかを理解するのを手伝ってもらえますか?

$result = mysqli_query($con,"SELECT * FROM faq ORDER BY `order`");
$result2 = mysqli_query($con,"SELECT * FROM sections ORDER BY `order`");

while($row = mysqli_fetch_array($result))
  {
  echo  '<form action="../../includes/faqupdate.php" method="post" style="margin:40px;">';
  echo  '<input type="text" name="order" style="width:20px;text-align:center;" onclick="this.value=\'\';" onfocus="this.select()" onblur="this.value=!this.value?\'' . $row['order'] . '\':this.value;" value="' . $row['order'] . '">';
  echo  '<input type="text" name="heading" onclick="this.value=\'\';" onfocus="this.select()" onblur="this.value=!this.value?\'' . $row['heading'] . '\':this.value;" value="' . $row['heading'] . '">';
  echo  '<select name="section">';
  $section = $row['section'];
  while($row = mysqli_fetch_array($result2)) {
      $sectionname = $row['sectionname'];
      if ($sectionname == $section) {
        echo    '<option value="' . $sectionname . '" selected="selected">' . $sectionname . '</option>';
      } else {
            echo    '<option value="' . $sectionname . '">' . $sectionname . '</option>';
      }
  }
  echo      '</select>';
  echo      '<input type="text" name="id" style="width:20px;background-color:#CCC;text-align:center;" value="' . $row['id'] . '" readonly>';
  echo      '<textarea name="content" cols="98" rows="10">' . $row['content'] . '</textarea>';
  echo      '<input type="submit" name="submission" value="Update">';
  echo      '<input type="submit" name="submission" value="Delete">';
  echo  '</form>';
  }
4

3 に答える 3

4

あなたのコードで私が目にするもう 1 つの問題は、クエリの結果セットを 1 回しかフェッチできないことです。代わりに、事前に値を取得し、そのように変数に格納します。

$result2 = mysqli_query($con, "SELECT * FROM sections ORDER BY `order`");
$sectionnames = array();
while($row = mysqli_fetch_array($result2)) {
    $sectionnames[] = $row['sectionname'];
}


$result = mysqli_query($con,"SELECT * FROM faq ORDER BY `order`");
while($row = mysqli_fetch_array($result))
  {
  echo  '<form action="../../includes/faqupdate.php" method="post" style="margin:40px;">';
  echo  '<input type="text" name="order" style="width:20px;text-align:center;" onclick="this.value=\'\';" onfocus="this.select()" onblur="this.value=!this.value?\'' . $row['order'] . '\':this.value;" value="' . $row['order'] . '">';
  echo  '<input type="text" name="heading" onclick="this.value=\'\';" onfocus="this.select()" onblur="this.value=!this.value?\'' . $row['heading'] . '\':this.value;" value="' . $row['heading'] . '">';
  echo  '<select name="section">';
  $section = $row['section'];
  foreach ($sectionnames as $sectionname) {
    if ($sectionname == $section) {
        echo    '<option value="' . $sectionname . '" selected="selected">' . $sectionname . '</option>';
    } else {
        echo    '<option value="' . $sectionname . '">' . $sectionname . '</option>';
    }
  }
  echo      '</select>';
  echo      '<input type="text" name="id" style="width:20px;background-color:#CCC;text-align:center;" value="' . $row['id'] . '" readonly>';
  echo      '<textarea name="content" cols="98" rows="10">' . $row['content'] . '</textarea>';
  echo      '<input type="submit" name="submission" value="Update">';
  echo      '<input type="submit" name="submission" value="Delete">';
  echo  '</form>';
  }
于 2013-06-29T02:23:27.737 に答える