使用URL查询构建API服务，每页20个数据项（codeigniter PHP）

Question

我想为我的图片文件夹（目录）构建具有以下功能的API服务：

1. 但我想使用网址查询每页显示20张图片网址。

2. 反向排序。

示例：

我的目录中有这些图片

1. /images/path.jpg
2. /images/path1.jpg
3. /images/path2.jpg
4. /images/path3.jpg
5. /images/path4.jpg
6. /images/path5.jpg
7. /images/path6.jpg
8. /images/path7.jpg
9. /images/path8.jpg 10./images/path9.jpg
10. /images/path10.jpg
11. /images/path11.jpg
12. /images/path12.jpg
13. /images/path13.jpg
14. /images/path14.jpg
15. /images/path15.jpg
16. /images/path16.jpg
17. /images/path17.jpg
18. /images/path18.jpg
19. /images/path19.jpg
20. /images/path20.jpg
21. /images/path21.jpg
22. /images/path22.jpg
23. /images/path23.jpg
24. /images/path24.jpg
25. /images/path25.jpg
26. /images/path26.jpg
27. /images/path27.jpg
28. /images/path28.jpg
29. /images/path29.jpg
30. /images/path30.jpg
31. /images/path31.jpg
32. /images/path32.jpg
33. /images/path33.jpg
34. /images/path34.jpg
35. /images/path35.jpg
36. /images/path36.jpg
37. /images/path37.jpg
38. /images/path38.jpg
39. /images/path39.jpg
40. /images/path40.jpg
41. /images/path41.jpg

我希望API网址和数据项看起来像这样

mypage.com/images-json?page=1

{
"img1": "/images/path41.jpg",
"img2": "/images/path40.jpg",
"img3": "/images/path39.jpg",
"img4": "/images/path38.jpg",
"img5": "/images/path37.jpg",
"img6": "/images/path36.jpg",
"img7": "/images/path35.jpg",
"img8": "/images/path34.jpg",
"img9": "/images/path33.jpg",
"img10": "/images/path32.jpg",
"img11": "/images/path31.jpg",
"img12": "/images/path30.jpg",
"img13": "/images/path29.jpg",
"img14": "/images/path28.jpg",
"img15": "/images/path27.jpg",
"img16": "/images/path26.jpg",
"img17": "/images/path25.jpg",
"img18": "/images/path24.jpg",
"img19": "/images/path23.jpg",
"img20": "/images/path22.jpg"
}

mypage.com/images-json?page=2

{
"img1": "/images/path21.jpg",
"img2": "/images/path20.jpg",
"img3": "/images/path19.jpg",
"img4": "/images/path18.jpg",
"img5": "/images/path17.jpg",
"img6": "/images/path16.jpg",
"img7": "/images/path15.jpg",
"img8": "/images/path14.jpg",
"img9": "/images/path13.jpg",
"img10": "/images/path12.jpg",
"img11": "/images/path11.jpg",
"img12": "/images/path10.jpg",
"img13": "/images/path9.jpg",
"img14": "/images/path8.jpg",
"img15": "/images/path7.jpg",
"img16": "/images/path6.jpg",
"img17": "/images/path5.jpg",
"img18": "/images/path4.jpg",
"img19": "/images/path3.jpg",
"img20": "/images/path2.jpg"
}

mypage.com/images-json?page=3

{
"img1": "/images/path1.jpg",
"img2": "/images/path.jpg"
}

目前我只有这个代码，但是这段代码只显示我目录文件夹中的所有图片，排序也不反转：

<?php 
$this->load->helper('directory'); //load directory helper
$dir = "images"; // Your Path to folder
$map = directory_map($dir); /* This function reads the directory path specified in the first parameter and builds an array representation of it and all its contained files. */

foreach ($map as $k)
{?>
     <img src="<?php echo base_url($dir)."/".$k;?>" alt="">

<?php }

?> 

Answer 1

尝试对目录网址使用FC_PATH，因为base_url不适用于目录数据。所以希望它能帮到你。

<?php 
     $this->load->helper('directory'); //load directory helper
     $dir = FCPATH."images/"; // Your Path to folder
     $map = directory_map($dir); /* This function reads the directory path specified in the first parameter and builds an array representation of it and all its contained files. */
     //and for sorting may be use krsort for this .
     krsort($map);

     foreach ($map as $k)
     {?>
        <img src="<?php echo $dir.$k;?>" alt="">

    <?php }
?>