php- 对数组中的数据进行分页
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【中文标题】php- 对数组中的数据进行分页【英文标题】:php- Paginate data from array 【发布时间】:2013-11-04 21:36:08 【问题描述】:我正在制作一个 WordPress 插件来与我们的图书馆系统集成。我正在尝试创建一个带有搜索表单的页面来搜索数据库。我在我们的图书馆服务器上创建了一个 API(它在我们的本地网络上),因此该站点可以与我们的图书馆后端进行交互。
我正在尝试对从 API 中提取的结果进行分页,数据是 json 格式。我创建了以下代码来从 API 获取 json 并将其转换为 php 数组,但它还没有实现搜索:
add_shortcode("book_search_form", "book_search_form");
function book_search_form()
$api_url = get_option('api_url');
$api_key = get_option('api_key');
$data = file_get_contents("$api_url/book/index.php/name/awesome/$api_key");
$data = (array)json_decode($data, true);
echo '<pre>';
var_dump($data);
echo '</pre>';
这是输出:
array(2)
[0]=>
array(22)
["barcode"]=>
string(12) "000015427928"
["name"]=>
string(74) "Janice VanCleave's 201 awesome, magical, bizarre & incredible experiments."
["author"]=>
string(12) "Janice Pratt"
["author_last"]=>
string(9) "VanCleave"
["publisher"]=>
string(11) "Wiley: 1994"
["year_pub"]=>
string(0) ""
["edition"]=>
string(0) ""
["genre"]=>
string(0) ""
["checkout"]=>
string(5) "false"
["series"]=>
string(0) ""
["callnum"]=>
string(5) "507.8"
["fiction"]=>
string(5) "false"
["in_house"]=>
string(5) "false"
["timestamp"]=>
string(10) "1374711656"
["outto"]=>
string(0) ""
["duedate"]=>
string(1) "0"
["ISBN"]=>
string(10) "0585339376"
["media_type"]=>
string(0) ""
["print"]=>
string(5) "false"
["BOXID"]=>
string(0) ""
["uid"]=>
string(1) "0"
["printed"]=>
string(4) "true"
[1]=>
array(22)
["barcode"]=>
string(12) "000015429634"
["name"]=>
string(50) "Our Awesome Earth: Its Mysteries and Its Splendors"
["author"]=>
string(4) "Paul"
["author_last"]=>
string(6) "Martin"
["publisher"]=>
string(35) "Natl Geographic Society: March 1994"
["year_pub"]=>
string(0) ""
["edition"]=>
string(0) ""
["genre"]=>
string(0) ""
["checkout"]=>
string(5) "false"
["series"]=>
string(0) ""
["callnum"]=>
string(3) "050"
["fiction"]=>
string(5) "false"
["in_house"]=>
string(5) "false"
["timestamp"]=>
string(10) "1382550052"
["outto"]=>
string(0) ""
["duedate"]=>
string(1) "0"
["ISBN"]=>
string(10) "0870445456"
["media_type"]=>
string(0) ""
["print"]=>
string(5) "false"
["BOXID"]=>
string(0) ""
["uid"]=>
string(1) "0"
["printed"]=>
string(5) "false"
我正在尝试创建分页,因为一些查询包含 50 或更多的书。我以前用 mysql 做过这个,但我不知道如何用数组来做。
谢谢!
【问题讨论】:
I want a pagination to my options page of wordpress plugin? 的可能重复项 您是否需要在数组上实现分页,因为您引用的 API 不提供与搜索词一起传递的偏移量和长度?如果是这样,您是否希望在每个请求上执行搜索查询并始终返回数组的子集? 【参考方案1】:以下是您将用于分页的代码原型,只需对其进行更改即可获得所需的结果。
if(isset($_GET['page']) && isset($_GET['paramsfordataonnextpage']))
$page=$_GET['page']; // get the value of the page from your url
$recordsPerPage=10; // number of records you want on your page
$array=//from your service
$index=($page*$recordsPerPage)-1;
$recordsToBeDisplayed = array_slice($array,$index,$recordsPerPage);// this array contains all the records you would want to display on a page;
$total_pages=ceil(count($array)/$recordsPerPage);
else
//use default values
<html>...<body><div id="records"><!-- use the array created above to display records -->
</div>
<div id="pagination">
for($j=1;$j<=$total_pages;$j++)
if($j==$page)
?>
<li style="display: inline;"><a href="/yourpaginationpage.php?paramsfordataonnextpage=&page=<?=$j?>"><u><?=$j?></u></a></li>
<?else?>
<li style="display: inline;"><a href="/yourpaginationpage.php?paramsfordataonnextpage=&page=<?=$j?>"><?=$j?></a></li>
<??>
</div>
</body>
...
</html>
【讨论】:
【参考方案2】:一个对数组进行分页的简单而干净的示例,可以正常工作并经过测试:)
function PaginateArray($input, $page, $show_per_page)
$page = $page < 1 ? 1 : $page;
$start = ($page - 1) * ($show_per_page);
$offset = $show_per_page;
$outArray = array_slice($input, $start, $offset);
var_export($outArray);
$input = array("1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20");
//page 1
PaginateArray($input, 1, 3);//inputs: array, page, records per page
/*
array (
0 => '1',
1 => '2',
2 => '3',
)
*/
//page 2
PaginateArray($input, 2, 3);//inputs: array, page, records per page
/*
array (
0 => '4',
1 => '5',
2 => '6',
)
*/
【讨论】:
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