Question

我在php中编写此代码时遇到了一些困难。我想创建一个不是背景的随机图像，我从之前的线程中学习，但我想学习如何创建一个随机图像。这是我到目前为止我只做了数组和HTML，但我的PHP代码是不完整的：

//Random Image PHP
  $images = array(array("image 1" => "caption 1"),
                  array("image 2" => "caption 2"),
                  array("image 3" => "caption 3");

//HTML
<div class="image-with-caption">
<img src="image 1/<?php echo $file; ?>.jpg" /> 
<p id="caption"><?php echo $caption; ?></p> 
</div>

我感谢任何解释＆amp;实例

Answer 1

<?php
  //Random Image PHP
  $images = array(array("image_1","caption 1"),
                  array("image_2","caption 2"),
                  array("image_3","caption 3"));
  $r = mt_rand(0,count($images)-1);
?>
//HTML
<div class="image-with-caption">
<img src="images/<?php echo $images[$r][0]; ?>.jpg" /> 
<p id="caption"><?php echo $images[$r][1]; ?></p> 
</div>

Answer 2

<?php 


//Random Image PHP
  $images = array();
  $images[0]['image'] = "image 1";
  $images[0]['caption'] = "image 1";
  $images[1]['image'] = "image 2";
  $images[1]['caption'] = "caption 2";
  $images[2]['image'] = "image 3";
  $images[2]['caption'] = "caption 3";

    $rand_index = mt_rand(0,2);

?>


//HTML
<div class="image-with-caption">

<img src="image 1/<?php echo $images[$rand_index]['image']."?".time(); ?>" /> 
<p id="caption"><?php echo $images[$rand_index]['caption']; ?></p> 

</div>

Answer 3

可能没有必要让数组在数组中，但如果你想这样做，你可以尝试：

//Random Image PHP
$images = array(array("image1" => "caption 1"),
                array("image2" => "caption 2"),
                array("image3" => "caption 3"));

$image_key = array_rand($images);
$file = key($images[$image_key]);
$caption = $images[$image_key][$file];


//HTML
<div class="image-with-caption">
<img src="images/<?php echo $file; ?>.jpg" /> 
<p id="caption"><?php echo $caption; ?></p> 
</div>

随机图像问题

3 个答案: