如何在滑块内隐藏一个或两个空输入图像? 我试过这个代码,我认为它有效,因为只显示一个图像,当另外两个是空的,但当我插入第二个或三个图像总是只显示第一个,我的错误在哪里?你能帮帮我..
这里是代码:
libraries js:
<script src="js/jquery-ui.min.js"></script>
<script type="text/javascript" src="js/jquery.nerveSlider.min.js"></script>
<script>
$(document).ready(function() {
$(".myslider").show();
$(".myslider").startslider({
slideTransitionSpeed: 900,
slideImageScaleMode: "fit",
sliderKeepAspectRatio: true,
slideTransitionEasing: "easeOutExpo",
slidesDraggable: true,
sliderResizable: true,
showDots:true,
});
});
</script>
<?php
try {
$query = "SELECT id, foto1, foto2, foto3 FROM FOTOS WHERE id = ?";
$stmt = $conn->prepare( $query );
$stmt->bindParam(1, $_REQUEST['id']);
$stmt->execute();
$row = $stmt->fetch(PDO::FETCH_ASSOC);
$id = $row['id'];
}
catch(PDOException $exception)
{
echo "Error: " . $exception->getMessage();
}
?>
<div class="myslider" id="<?php echo $id; ?>">
<?php
if (!empty($row['foto1']))
{
echo '<img src="assets/img/'.$row["foto1"].'" alt="imagen 1" style="max-width:600px; max-height:400px;" />';
}
else if (!empty($row['foto2']))
{
echo '<img src="assets/img/'.$row["foto2"].'" alt="imagen 2" style="max-width:600px; max-height:400px;" />';
}
else if (!empty($row['foto3']))
{
echo '<img src="assets/img/'.$row["foto3"].'" alt="imagen 3" style="max-width:600px; max-height:400px;" />';
}
?>
</div>
答案 0 :(得分:1)
问题在于您的PHP代码;
if-else if-else if
组只会在第一个if
或else if
检查返回true之前处理;然后它将处理该语句并跳过其余的else if
语句。所以要修复它,只需用else if
替换if
s - 就像这样:
...snip...
<div class="myslider" id="<?php echo $id; ?>">
<?php
if (!empty($row['foto1']))
{
echo '<img src="assets/img/'.$row["foto1"].'" alt="imagen 1" style="max-width:600px; max-height:400px;" />';
}
if (!empty($row['foto2']))
{
echo '<img src="assets/img/'.$row["foto2"].'" alt="imagen 2" style="max-width:600px; max-height:400px;" />';
}
if (!empty($row['foto3']))
{
echo '<img src="assets/img/'.$row["foto3"].'" alt="imagen 3" style="max-width:600px; max-height:400px;" />';
}
?>
</div>
答案 1 :(得分:0)
<div class="myslider" id="<?php echo $id; ?>">
<?php
if (!empty($row['foto1'])) {
echo '<img src="assets/img/'.$row["foto1"].'" alt="imagen 1" style="max-width:600px; max-height:400px;" />';
} else {
echo '';
}
if (!empty($row['foto2'])) {
echo '<img src="assets/img/'.$row["foto2"].'" alt="imagen 2" style="max-width:600px; max-height:400px;" />';
} else {
echo '';
}
if (!empty($row['foto3'])) {
echo '<img src="assets/img/'.$row["foto3"].'" alt="imagen 3" style="max-width:600px; max-height:400px;" />';
} else {
echo '';
}
?>