[英]How i make PHP/HTML images show original size onclick?
I am developing a news section that contains text and images in which the images to be clicked have to show their original size. 我正在开发一个包含文本和图像的新闻部分,其中要点击的图像必须显示其原始大小。 Can someone help me with this?
有人可以帮我弄这个吗?
<?php
$select_stmt=$db->prepare("SELECT * FROM teste ORDER BY id DESC;" ); //sql select query
$select_stmt->execute();
while($row=$select_stmt->fetch(PDO::FETCH_ASSOC))
{
?>
<div class="container" id="fadein">
<div class="row">
<div class="col-sm-4">
<div id="imagem"><img src="upload/<?php echo $row['image']; ?>" class="imagem"></div>
<script src="scripts/javascript.js"></script>
</div>
<div class="col-sm-8">
<div class="col-sm-12" id="titulo"><?php echo $row['titulo'];?></div>
<br>
<div class="col-sm-12" id="sub_titulo"><?php echo $row['sub_titulo'];?></div>
<br>
<div class="col-sm-12" id="texto"><?php echo $row['texto'];?></div>
</div>
</div>
<br>
<div class="row">
<div class="col-sm-6" align="right"><a href="edit.php?update_id=<?php echo $row['id']; ?>" class="btn btn-warning">Editar</a></div>
<div class="col-sm-6"><a href="?delete_id=<?php echo $row['id']; ?>" class="btn btn-danger">Eliminar</a></div>
</div>
<br>
<br>
<br>
<p class="barra"></p>
<br>
<br>
</div>
<?php
}
?>
(Probably second part is more usefull for your use case) (可能第二部分对您的用例更有用)
If you want pure javascript, you can set a onclick event listener and get images real size ( Determine original size of image cross browser? ) and set this size to image. 如果你想要纯粹的javascript,你可以设置一个onclick事件监听器并获得真实大小的图像 ( 确定图像跨浏览器的原始大小? )并将此大小设置为图像。 (if you want it to set to old sizes on second click, save old size to a global variable and get then set).
(如果您希望在第二次单击时将其设置为旧大小,请将旧大小保存到全局变量然后设置)。 Which will look like this:
这将是这样的:
I'm not good with pure javascript but i guess this is it. 我不擅长使用纯JavaScript,但我想这就是它。
Add this code somewhere in your file. 在您的文件中的某处添加此代码。 It will run for every image
它将针对每个图像运行
<script>
window.onload = function() {
images = document.getElementsByTagName("img");
for (var i = 0; i < images.length; i++){
images[i].onclick = function(e){
var isBig = e.target.getAttribute('isBig');
if (isBig === undefined || isBig == 'false'){
// make it big
e.target.setAttribute('isBig', 'true');
e.target.setAttribute('oldWidth', e.target.offsetWidth);
e.target.setAttribute('oldHeight', e.target.offsetWidth);
var newImg = new Image();
newImg.onload = function() {
e.target.style.width = newImg.width+"px";
e.target.style.height = newImg.height+"px";
}
newImg.src = e.target.getAttribute('src');
}
else {
// make it small
e.target.setAttribute('isBig', 'false');
e.target.style.width = e.target.getAttribute('oldWidth')+"px";
e.target.style.height = e.target.getAttribute('oldHeight')+"px";
}
}
}
}
</script>
This will set images width and height to original sizes. 这会将图像宽度和高度设置为原始大小。
If you want to make it fullscreen with absolute positioning, you need to create a new element and img tag. 如果要使用绝对定位使其全屏,则需要创建新元素和img标记。 And you just need to set its src to image's src.
而你只需要将其src设置为image的src。 Then you can show that image.
然后你可以显示该图像。 Example:
例:
<!-- add this somewhere in body -->
<!-- container -->
<div id="bigImage" style="z-index: 4; position: fixed; width: 100%; height: 100%; top: 0; left: 0; visibility: hidden;">
<!-- background. not necessary but usefull for close thing. -->
<div style="position: absolute; width: 100%; height: 100%; top: 0; left: 0; background: rgba(0, 0, 0, .7); cursor: pointer;" onclick="closeImage()"></div>
<!-- image element. object-fit: contain; for full window size -->
<img src="<?php echo $row['image']; ?>" alt="bigImage" id="bigImageChild" style="position: absolute; top: 5%; left: 5%; z-index: 6; width: 90%; height: 90%; object-fit: contain;">
<!-- close button -->
<span onclick="closeImage()" style="position: absolute; right: 20px; top: 20px; font-weight: 900; color: white; cursor: pointer;">X</span>
</div>
<!-- script for image -->
<script>
function closeImage() {
document.getElementById("bigImage").style.visibility = 'hidden';
}
images = document.getElementsByTagName("img");
for (var i = 0; i < images.length; i++){
// on image click
images[i].onclick = function(e){
// set image src
document.getElementById("bigImageChild").src = e.target.src;
// show image
document.getElementById("bigImage").style.visibility = 'visible';
}
}
</script>
当我第一次点击时,我需要将图像设置为原始大小,然后第二次点击图像返回到html中定义的原始大小。
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