如何使用 jqGrid 的单一搜索功能？
我正在关注“3.7 版中的新功能”下的“单一搜索”示例。 jqGrid Demo Page
我的脚本几乎完全保存了用于从数据库中检索数据的查询，但我的脚本没有进行过滤。
谁能指出一个使用 PHP 的单一搜索功能的完整示例？
我对演示页面中的脚本也有疑问。
$where，但该变量没有在 PHP 脚本中声明。【问题讨论】：
标签： php jquery search jqgrid jqgrid-php
我已经使用 MySQL 数据库编写了一个示例。
首先创建一个“test”数据库，一个“items”表，并插入一些记录：
CREATE DATABASE IF NOT EXISTS test;
CREATE TABLE IF NOT EXISTS `items` (
`item_id` int(11) NOT NULL,
`item` varchar(255) DEFAULT '',
`item_cd` varchar(255) DEFAULT '',
PRIMARY KEY (`item_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
LOCK TABLES `items` WRITE;
INSERT INTO `items` VALUES (1,'Lorem','575878');
INSERT INTO `items` VALUES (2,'Lorem','857450');
INSERT INTO `items` VALUES (3,'ipsum','292404');
INSERT INTO `items` VALUES (4,'dolor','814131');
INSERT INTO `items` VALUES (5,'sit','962077');
INSERT INTO `items` VALUES (6,'amet,','549801');
INSERT INTO `items` VALUES (7,'sed','166822');
INSERT INTO `items` VALUES (8,'in','616758');
INSERT INTO `items` VALUES (9,'id','550799');
INSERT INTO `items` VALUES (10,'dictum','763004');
INSERT INTO `items` VALUES (11,'velit','244985');
INSERT INTO `items` VALUES (12,'est','525127');
INSERT INTO `items` VALUES (13,'suspendisse,','351690');
INSERT INTO `items` VALUES (14,'mauris','655061');
INSERT INTO `items` VALUES (15,'eget','423779');
INSERT INTO `items` VALUES (16,'imperdiet','493615');
INSERT INTO `items` VALUES (17,'ut,','864029');
INSERT INTO `items` VALUES (18,'mauris','546065');
INSERT INTO `items` VALUES (19,'vestibulum,','562819');
INSERT INTO `items` VALUES (20,'sagittis','238043');
INSERT INTO `items` VALUES (21,'ac.','867508');
INSERT INTO `items` VALUES (22,'Mauris','674897');
INSERT INTO `items` VALUES (23,'id','288097');
INSERT INTO `items` VALUES (24,'quam,','889530');
UNLOCK TABLES;
接下来，创建 html 页面“singlesearch.html”：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" media="screen" href="http://www.trirand.com/blog/jqgrid/themes/redmond/jquery-ui-custom.css" />
<link rel="stylesheet" type="text/css" media="screen" href="http://www.trirand.com/blog/jqgrid/themes/ui.jqgrid.css" />
<script src="http://www.trirand.com/blog/jqgrid/js/jquery.js" type="text/javascript"></script>
<script src="http://www.trirand.com/blog/jqgrid/js/i18n/grid.locale-en.js" type="text/javascript"></script>
<script src="http://www.trirand.com/blog/jqgrid/js/jquery.jqGrid.js" type="text/javascript"></script>
<script type="text/javascript">
jQuery(document).ready(function(){
jQuery("#single").jqGrid({
url:'localset.php',
datatype: "json",
height: 255,
width: 600,
colNames:['Index','Name', 'Code'],
colModel:[
{name:'item_id',index:'item_id', width:65, sorttype:'int'},
{name:'item' ,index:'item' , width:150},
{name:'item_cd',index:'item_cd', width:100}
],
rowNum:50,
rowTotal: 2000,
rowList : [20,30,50],
loadonce: false,
mtype: "GET",
rownumbers: true,
rownumWidth: 40,
gridview: true,
pager: '#psingle',
sortname: 'item_id',
viewrecords: true,
sortorder: "asc",
caption: "Single search on local data",
loadError: function(jqXHR, textStatus, errorThrown) {
/*
alert('HTTP status code: ' + jqXHR.status + '\n' +
'textStatus: ' + textStatus + '\n' +
'errorThrown: ' + errorThrown);
alert('HTTP message body (jqXHR.responseText): ' + '\n' + jqXHR.responseText);
*/
alert(jqXHR.responseText);
}
});
jQuery("#single").jqGrid(
'navGrid',
'#psingle',
{del:false,add:false,edit:false},
{}, // default settings for edit
{}, // default settings for add
{}, //
{closeAfterSearch:true}, // search options
{} // view parameters
);
});
</script>
</head>
<body>
<table id="single"></table>
<div id="psingle"></div>
</body>
</html>
然后创建一个PHP页面“localset.php”：
<?php
function myTrace($str) {
// Adjust the log file name before uncommenting
//@file_put_contents("/tmp/localset.log", $str."\n", FILE_APPEND);
}
myTrace(print_r($_REQUEST,true));
// connect to the database
$link = mysqli_init();
// Adjust host, user, password and dbname before use!
$db = mysqli_real_connect($link, "myhost", "myuser", "mypass", "test");
if (!$db) {
die('Connect Error ('.mysqli_connect_errno().'): '.mysqli_connect_error());
}
mysqli_set_charset($link, "utf8");
$page = isset($_REQUEST['page']) ? $_REQUEST['page'] : 0; // get the requested page
$limit = isset($_REQUEST['rows']) ? $_REQUEST['rows'] : 50; // get how many rows we want to have into the grid
$sidx = isset($_REQUEST['sidx']) ? $_REQUEST['sidx'] : 1; // get index row - i.e. user click to sort
$sord = isset($_REQUEST['sord']) ? $_REQUEST['sord'] : "asc"; // get the direction
if ($_REQUEST["_search"] == "false") {
$where = "where 1";
} else {
$operations = array(
'eq' => "= '%s'", // Equal
'ne' => "<> '%s'", // Not equal
'lt' => "< '%s'", // Less than
'le' => "<= '%s'", // Less than or equal
'gt' => "> '%s'", // Greater than
'ge' => ">= '%s'", // Greater or equal
'bw' => "like '%s%%'", // Begins With
'bn' => "not like '%s%%'", // Does not begin with
'in' => "in ('%s')", // In
'ni' => "not in ('%s')", // Not in
'ew' => "like '%%%s'", // Ends with
'en' => "not like '%%%s'", // Does not end with
'cn' => "like '%%%s%%'", // Contains
'nc' => "not like '%%%s%%'", // Does not contain
'nu' => "is null", // Is null
'nn' => "is not null" // Is not null
);
$value = mysqli_real_escape_string($link, $_REQUEST["searchString"]);
$where = sprintf("where %s ".$operations[$_REQUEST["searchOper"]], $_REQUEST["searchField"], $value);
}
$SQL = "SELECT item_id, item, item_cd FROM items ".$where." ORDER BY $sidx $sord";
myTrace($SQL);
$result = mysqli_query($link, $SQL);
if (!$result) {
myTrace(mysqli_error($link));
die("Couldn't execute query: ".mysqli_error($link));
}
if ($limit < 0) $limit = 0;
$start = ($limit * $page) - $limit;
if ($start < 0) $start = 0;
$count = mysqli_num_rows($result);
if ($count > 0) {
$total_pages = ceil($count / $limit);
} else {
$total_pages = 0;
}
if ($page > $total_pages) {
$page = $total_pages;
}
$responce->page = $page;
$responce->total = $total_pages;
$responce->records = $count;
mysqli_data_seek($result, $start);
for ($i = 0; $row = mysqli_fetch_assoc($result); $i++) {
if (($limit > 0) && ($i >= $limit)) break;
$responce->rows[$i]['id'] = $row['item_id'];
$responce->rows[$i]['cell'] = array($row['item_id'], $row['item'], $row['item_cd']);
}
echo json_encode($responce);
mysqli_close($link);
?>
在您的 PHP.INI 文件中启用PHP mysqli extension，在“localset.php”脚本（第 15 行）中调整连接参数，最后在浏览器中打开“singlesearch.html”页面。
【讨论】：