<?php
$rows_per_page = 2;
$cols_per_page = 2;
$image_href = '<a href=/';
$image_links = array('file1/page1>', 'file2/page2>', 'file3/page3>',
'file4/page4>', 'file5/page5>', 'file6/page6>', 'file6/page6>',
'file/page7>', 'file/page8>', 'subfile/page9>');
$img_srcs = '<img src="https://s3.amazonaws.com/imagetitle/';
$images = array();
for($i = 1; $i < 10; $i++)
{
$images[$i] = $i;
}
$image_ending = '.png" height="200" width="200" /></a>';
$image_descriptions = array('<br />something', '<br />description',
'<br />arbitrary', 'random', '<br />you', '<br />get', '<br />the',
'<br />idea', '<br />itsdescriptions');
$total_images = count($images);
$images_per_page = $rows_per_page * $cols_per_page;
$total_images = count($images);
$total_pages = ceil($total_images / $images_per_page);
$current_page = (int) $_GET['page'];
if($current_page<1 || $current_page>$total_pages)
{
$current_page = 1;
}
//Get records for the current page
$page_image_links = array_splice($image_links, ($current_page-1)*$images_per_page, $images_per_page);
$page_images = array_splice($images, ($current_page-1)*$images_per_page, $images_per_page);
$page_image_descriptions = array_splice($image_descriptions, ($current_page-1)*$images_per_page, $images_per_page);
$slots = "<table border=\"1\">";
for($row=0; $row<$rows_per_page; $row++)
{
$slots .= "<tr>";
for($col=0; $col<$cols_per_page; $col++)
{
$imgIdx = ($row * $rows_per_page) + $col;
$img = (isset($page_images[$imgIdx])) ? "{$image_href}{$page_image_links[$imgIdx]}{$img_srcs}{$page_images[$imgIdx]}{$image_ending}{$page_image_descriptions[$imgIdx]}" : ' ';
$slots .= "<td>$img</td>";
}
$slots .= "</tr>";
}
$slots .= "</table>";
//Create pagination links
$first = "First";
$prev = "Prev";
$next = "Next";
$last = "Last";
if($current_page>1)
{
$prevPage = $current_page - 1;
$first = "<a href=\"blah.php?page=1\">First</a>";
$prev = "<a href=\"blah.php?page={$prevPage}\">Prev</a>";
}
if($current_page<$total_pages)
{
$nextPage = $current_page + 1;
$next = "<a href=\"blah.php?page={$nextPage}\">Next</a>";
$last = "<a href=\"blah.php?page={$total_pages}\">Last</a>";
}
?>
<html>
<title></title>
<body>
<h2>Here are the records for page <?php echo $current_page; ?></h2>
<ul>
<?php echo $slots; ?>
</ul>
Page <?php echo $current_page; ?> of <?php echo $total_pages; ?>
<br />
<?php echo "{$first} | {$prev} | {$next} | {$last}"; ?>
</body>
</html>
所以基本上上面这段代码可以很容易地提供图像及其链接。目前，我没有那么多图像，因此页面运行速度非常快。但是，从长远来看，我在想。如果我说10,000张图片，则需要花费很长时间来处理每个分页页面，因为我会将file1 / page1的$ image_links提升到file10000 / page10000，以及10000个不同的图像描述！有没有办法阻止Web浏览器读取或跳过脚本的某些部分（在我的情况下为$ image_links和$ image_descriptions）？这样，它就不需要通读所有10000 $ image_links和$ image_descriptions。
谢谢！
答案 0 :(得分：4)
在这种情况下，人们通常会将每张图像的记录存储在数据库中。这样，您不必每次都创建整个图像列表。因此，您只需检索用户当前正在查看的页面的图像。
您还可以缓存结果。有各种各样的方法，类和库可以做到这一点，但它基本上涉及做这样的事情：
$cache_key = 'cache-page-'.$pagenumer.'.cache';
if (!file_exists($cache_key)) {
ob_start();
// all your code comes here - to make it very
// fast, you can do an include() here on the other file
include 'the-rest-of-your-code-example.php';
$output = ob_get_clean();
$fp = fopen($cache_key, 'w');
fwrite($fp, $output);
fclose($fp);
} else {
$output = file_get_contents($cache_key);
}
// And finally echo the content
echo $output;