如果没有图像,如何隐藏图像标签?基本上,我有一个图像库,有4个图像可以设置。但是,如果产品有2个图像,我如何隐藏其他2个图像标签?什么是最好的使用方法?
<img src="/images/large/<?=$prod_id?>.jpg" onclick="openModal();currentSlide(1)" style="border: 1px solid #cccccc;" class="hover-single"/>
<div class="row">
<p style="text-align:center;">Click on image to enlarge</p>
<div class="column">
<img src="/images/large2/<?=$prod_id?>.jpg" style="width:80px; height:80px; border-right: 1px solid #cccccc; padding-right: 5px;" onclick="openModal();currentSlide(2)" class="hover-shadow cursor">
</div>
<div class="column">
<img src="/images/large3/<?=$prod_id?>.jpg" style="width:80px; height:80px; border-right: 1px solid #cccccc; padding-right: 5px;" onclick="openModal();currentSlide(3)" class="hover-shadow cursor">
</div>
<div class="column">
<img src="/images/large4/<?=$prod_id?>.jpg" style="width:80px; height:80px;" onclick="openModal();currentSlide(4)" class="hover-shadow cursor">
</div>
</div>
<div id="myModal" class="modal" style="display: block;">
<span class="close cursor" onclick="closeModal()">×</span>
<div class="modal-content">
<div class="mySlides" style="display: block;">
<div class="numbertext">1 / 4</div>
<img src="/images/large1/<?=$prod_id?>.jpg" style="width:95%; height:95%; margin-left: 2.5%;">
</div>
<div class="mySlides" style="display: none;">
<div class="numbertext">2 / 4</div>
<img src="/images/large2/<?=$prod_id?>.jpg" style="width:95%; height:95%; margin-left: 2.5%;">
</div>
<div class="mySlides" style="display: none;">
<div class="numbertext">3 / 4</div>
<img src="/images/large3/<?=$prod_id?>.jpg" style="width:95%; height:95%; margin-left: 2.5%;">
</div>
<div class="mySlides" style="display: none;">
<div class="numbertext">4 / 4</div>
<img src="/images/large4/<?=$prod_id?>.jpg" style="width:95%; height:95%; margin-left: 2.5%;">
</div>
<a class="prev" onclick="plusSlides(-1)"><</a>
<a class="next" onclick="plusSlides(1)">></a>
<div class="caption-container">
<p id="caption"></p>
</div>
<div class="column">
<img class="gallery cursor active" src="/images/large1/<?=$prod_id?>.jpg" style="width:95%; height:95%;" onclick="currentSlide(1)">
</div>
<div class="column">
<img class="gallery cursor" src="/images/large2/<?=$prod_id?>.jpg" style="width:95%; height:95%;" onclick="currentSlide(2)">
</div>
<div class="column">
<img class="gallery cursor" src="/images/large3/<?=$prod_id?>.jpg" style="width:95%; height:95%;" onclick="currentSlide(3)">
</div>
<div class="column">
<img class="gallery cursor" src="/images/large4/<?=$prod_id?>.jpg" style="width:95%; height:95%;" onclick="currentSlide(4)">
</div>
</div>
</div>
答案 0 :(得分:1)
您的模态内容代码可以重写如下:
检查图像文件是否存在
如果图像文件存在则显示幻灯片,否则不执行任何操作。
for($i = 1; $i<=4; $i++) {
$img_file = '/images/large'.$i.'/'.$prod_id.'.jpg';
if(file_exists($img_file)) {
$display = ($i == 1) ? ' block' : ' none';
echo '<div class="mySlides" style="display:'.$display.';">';
echo ' <div class="numbertext">'.$i.' / 4</div>';
echo ' <img src="'.$img_file.'" style="width:95%; height:95%; margin-left: 2.5%;">';
echo '</div>';
}
}
以上代码可用于替换以下代码部分:
<div class="mySlides" style="display: block;">
<div class="numbertext">1 / 4</div>
<img src="/images/large1/<?=$prod_id?>.jpg" style="width:95%; height:95%; margin-left: 2.5%;">
</div>
<div class="mySlides" style="display: none;">
<div class="numbertext">2 / 4</div>
<img src="/images/large2/<?=$prod_id?>.jpg" style="width:95%; height:95%; margin-left: 2.5%;">
</div>
<div class="mySlides" style="display: none;">
<div class="numbertext">3 / 4</div>
<img src="/images/large3/<?=$prod_id?>.jpg" style="width:95%; height:95%; margin-left: 2.5%;">
</div>
<div class="mySlides" style="display: none;">
<div class="numbertext">4 / 4</div>
<img src="/images/large4/<?=$prod_id?>.jpg" style="width:95%; height:95%; margin-left: 2.5%;">
</div>
当然,这不是每次检查file_exists
的最佳方法。这可以通过在数据集/数据库中存储每个产品的图像数量来改进。然后设置一个新变量,如$img_num
,以替换循环中的4。
答案 1 :(得分:0)
试试这段代码:
<div class="row">
<p style="text-align:center;">Click on image to enlarge</p>
<div class="column">
<?php if(file_exists('/images/large2/'.$prod_id.'.jpg')){<?php>
<img src="/images/large2/<?=$prod_id?>.jpg" style="width:80px; height:80px; border-right: 1px solid #cccccc; padding-right: 5px;" onclick="openModal();currentSlide(2)" class="hover-shadow cursor"><?php }
</php>
答案 2 :(得分:0)
您可以根据自己的要求:
$query = "here is your query";
$res = "your query executed";
$imagearray = array();
$i = 0;
while($row = mysql_fetch_array($res))
{
if(file_exists(imagepath.$row["image"]))
{
$imagearray[$i] = $row["image"];
$i++
}
}
答案 3 :(得分:0)
嗨,他们的兄弟ild烟道做得很好,但是我们可以更多地增强代码,但是提升动态更多,我建议下面的代码,
显示指定的图像,然后将其余部分丢弃。
<div id="myModal" class="modal" style="display: block;">
<span class="close cursor" onclick="closeModal()">×</span>
<div class="modal-content">
<?php
$k=1;
$dirs = array_filter(glob('images/*'), 'is_dir');
foreach ( $dirs as $allLargeDir ){
$imgPath=$allLargeDir."/".$prod_id.".jpg";
if(file_exists($imgPath)){
?>
<div class="mySlides" style="display: block;">
<div class="numbertext"><?php echo $k++." / ".$n; ?></div>
<img src="<?php echo $imgPath;?>" style="width:95%; height:95%; margin-left: 2.5%;">
</div>
<?php
}
}
?>