您好我在使用SQL Server的数据表的服务器端处理功能时遇到了一些问题。
我有一个测试页面，应该显示数据库表中的两列（暂时）。
HTML：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<link rel="Stylesheet" type="text/css" href="DataTables-1.10.0/media/css/jquery.dataTables.min.css" />
</head>
<body>
<table id="example" class="display" cellspacing="0" width="100%">
<thead>
<tr>
<th align="center">PK</th>
<th align="center">Network</th>
</tr>
</thead>
<tfoot>
<tr>
<th align="center">PK</th>
<th align="center">Network</th>
</tr>
</tfoot>
</table>
</body>
<script type="text/javascript" src="DataTables-1.10.0/media/js/jquery.js"></script>
<script type="text/javascript" src="DataTables-1.10.0/media/js/jquery.dataTables.min.js">
</script>
<script type="text/javascript" charset="utf-8">
$(document).ready(function () {
$('#example').dataTable({
"processing": true,
"bServerSide": true,
"ajax": "PHP/testGetArchive.php"
});
});
</script>
</html>
我正在使用网站上的示例代码。这里是服务器端功能：
http://next.datatables.net/examples/server_side/simple.html
这是我正在调用的php页面版本：
<?php
/*
* DataTables example server-side processing script.
*
* Please note that this script is intentionally extremely simply to show how
* server-side processing can be implemented, and probably shouldn't be used as
* the basis for a large complex system. It is suitable for simple use cases as
* for learning.
*
* See http://datatables.net/usage/server-side for full details on the server-
* side processing requirements of DataTables.
*
* @license MIT - http://datatables.net/license_mit
*/
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Easy set variables
*/
// DB table to use
$table = 'tblViews';
// Table's primary key
$primaryKey = 'PK';
// Array of database columns which should be read and sent back to DataTables.
// The `db` parameter represents the column name in the database, while the `dt`
// parameter represents the DataTables column identifier. In this case simple
// indexes
$columns = array(
array( 'db' => 'PK', 'dt' => 0 ),
array( 'db' => 'Network', 'dt' => 1 )
);
// SQL server connection information
$sql_details = array(
'user' => '******',
'pass' => '******',
'db' => '******db',
'host' => '******\SQLEXPRESS'
);
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* If you just want to use the basic configuration for DataTables with PHP
* server-side, there is no need to edit below this line.
*/
require( 'ssp.class.php' );
echo json_encode(
SSP::simple( $_GET, $sql_details, $table, $primaryKey, $columns )
);
然后调用这里找到的第二个PHP示例：
https://github.com/DataTables/DataTables/blob/master/examples/server_side/scripts/ssp.class.php
这是我的副本。我执行的唯一修改是删除示例所需的代码块。
<?php
/*
* Helper functions for building a DataTables server-side processing SQL query
*
* The static functions in this class are just helper functions to help build
* the SQL used in the DataTables demo server-side processing scripts. These
* functions obviously do not represent all that can be done with server-side
* processing, they are intentionally simple to show how it works. More complex
* server-side processing operations will likely require a custom script.
*
* See http://datatables.net/usage/server-side for full details on the server-
* side processing requirements of DataTables.
*
* @license MIT - http://datatables.net/license_mit
*/
class SSP {
/**
* Create the data output array for the DataTables rows
*
* @param array $columns Column information array
* @param array $data Data from the SQL get
* @return array Formatted data in a row based format
*/
static function data_output ( $columns, $data )
{
$out = array();
for ( $i=0, $ien=count($data) ; $i<$ien ; $i++ ) {
$row = array();
for ( $j=0, $jen=count($columns) ; $j<$jen ; $j++ ) {
$column = $columns[$j];
// Is there a formatter?
if ( isset( $column['formatter'] ) ) {
$row[ $column['dt'] ] = $column['formatter']( $data[$i][ $column['db'] ], $data[$i] );
}
else {
$row[ $column['dt'] ] = $data[$i][ $columns[$j]['db'] ];
}
}
$out[] = $row;
}
return $out;
}
/**
* Paging
*
* Construct the LIMIT clause for server-side processing SQL query
*
* @param array $request Data sent to server by DataTables
* @param array $columns Column information array
* @return string SQL limit clause
*/
static function limit ( $request, $columns )
{
$limit = '';
if ( isset($request['start']) && $request['length'] != -1 ) {
$limit = "LIMIT ".intval($request['start']).", ".intval($request['length']);
}
return $limit;
}
/**
* Ordering
*
* Construct the ORDER BY clause for server-side processing SQL query
*
* @param array $request Data sent to server by DataTables
* @param array $columns Column information array
* @return string SQL order by clause
*/
static function order ( $request, $columns )
{
$order = '';
if ( isset($request['order']) && count($request['order']) ) {
$orderBy = array();
$dtColumns = SSP::pluck( $columns, 'dt' );
for ( $i=0, $ien=count($request['order']) ; $i<$ien ; $i++ ) {
// Convert the column index into the column data property
$columnIdx = intval($request['order'][$i]['column']);
$requestColumn = $request['columns'][$columnIdx];
$columnIdx = array_search( $requestColumn['data'], $dtColumns );
$column = $columns[ $columnIdx ];
if ( $requestColumn['orderable'] == 'true' ) {
$dir = $request['order'][$i]['dir'] === 'asc' ?
'ASC' :
'DESC';
$orderBy[] = '`'.$column['db'].'` '.$dir;
}
}
$order = 'ORDER BY '.implode(', ', $orderBy);
}
return $order;
}
/**
* Searching / Filtering
*
* Construct the WHERE clause for server-side processing SQL query.
*
* NOTE this does not match the built-in DataTables filtering which does it
* word by word on any field. It's possible to do here performance on large
* databases would be very poor
*
* @param array $request Data sent to server by DataTables
* @param array $columns Column information array
* @param array $bindings Array of values for PDO bindings, used in the
* sql_exec() function
* @return string SQL where clause
*/
static function filter ( $request, $columns, &$bindings )
{
$globalSearch = array();
$columnSearch = array();
$dtColumns = SSP::pluck( $columns, 'dt' );
if ( isset($request['search']) && $request['search']['value'] != '' ) {
$str = $request['search']['value'];
for ( $i=0, $ien=count($request['columns']) ; $i<$ien ; $i++ ) {
$requestColumn = $request['columns'][$i];
$columnIdx = array_search( $requestColumn['data'], $dtColumns );
$column = $columns[ $columnIdx ];
if ( $requestColumn['searchable'] == 'true' ) {
$binding = SSP::bind( $bindings, '%'.$str.'%', PDO::PARAM_STR );
$globalSearch[] = "`".$column['db']."` LIKE ".$binding;
}
}
}
// Individual column filtering
for ( $i=0, $ien=count($request['columns']) ; $i<$ien ; $i++ ) {
$requestColumn = $request['columns'][$i];
$columnIdx = array_search( $requestColumn['data'], $dtColumns );
$column = $columns[ $columnIdx ];
$str = $requestColumn['search']['value'];
if ( $requestColumn['searchable'] == 'true' &&
$str != '' ) {
$binding = SSP::bind( $bindings, '%'.$str.'%', PDO::PARAM_STR );
$columnSearch[] = "`".$column['db']."` LIKE ".$binding;
}
}
// Combine the filters into a single string
$where = '';
if ( count( $globalSearch ) ) {
$where = '('.implode(' OR ', $globalSearch).')';
}
if ( count( $columnSearch ) ) {
$where = $where === '' ?
implode(' AND ', $columnSearch) :
$where .' AND '. implode(' AND ', $columnSearch);
}
if ( $where !== '' ) {
$where = 'WHERE '.$where;
}
return $where;
}
/**
* Perform the SQL queries needed for an server-side processing requested,
* utilising the helper functions of this class, limit(), order() and
* filter() among others. The returned array is ready to be encoded as JSON
* in response to an SSP request, or can be modified if needed before
* sending back to the client.
*
* @param array $request Data sent to server by DataTables
* @param array $sql_details SQL connection details - see sql_connect()
* @param string $table SQL table to query
* @param string $primaryKey Primary key of the table
* @param array $columns Column information array
* @return array Server-side processing response array
*/
static function simple ( $request, $sql_details, $table, $primaryKey, $columns )
{
$bindings = array();
$db = SSP::sql_connect( $sql_details );
// Build the SQL query string from the request
$limit = SSP::limit( $request, $columns );
$order = SSP::order( $request, $columns );
$where = SSP::filter( $request, $columns, $bindings );
// Main query to actually get the data
$data = SSP::sql_exec( $db, $bindings,
"SELECT SQL_CALC_FOUND_ROWS `".implode("`, `", SSP::pluck($columns, 'db'))."`
FROM `$table`
$where
$order
$limit"
);
// Data set length after filtering
$resFilterLength = SSP::sql_exec( $db,
"SELECT FOUND_ROWS()"
);
$recordsFiltered = $resFilterLength[0][0];
// Total data set length
$resTotalLength = SSP::sql_exec( $db,
"SELECT COUNT(`{$primaryKey}`)
FROM `$table`"
);
$recordsTotal = $resTotalLength[0][0];
/*
* Output
*/
return array(
"draw" => intval( $request['draw'] ),
"recordsTotal" => intval( $recordsTotal ),
"recordsFiltered" => intval( $recordsFiltered ),
"data" => SSP::data_output( $columns, $data )
);
}
/**
* Connect to the database
*
* @param array $sql_details SQL server connection details array, with the
* properties:
* * host - host name
* * db - database name
* * user - user name
* * pass - user password
* @return resource Database connection handle
*/
static function sql_connect ( $sql_details )
{
try {
$db = @new PDO(
"mysql:host={$sql_details['host']};dbname={$sql_details['db']}",
$sql_details['user'],
$sql_details['pass'],
array( PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION )
);
}
catch (PDOException $e) {
SSP::fatal(
"An error occurred while connecting to the database. ".
"The error reported by the server was: ".$e->getMessage()
);
}
return $db;
}
/**
* Execute an SQL query on the database
*
* @param resource $db Database handler
* @param array $bindings Array of PDO binding values from bind() to be
* used for safely escaping strings. Note that this can be given as the
* SQL query string if no bindings are required.
* @param string $sql SQL query to execute.
* @return array Result from the query (all rows)
*/
static function sql_exec ( $db, $bindings, $sql=null )
{
// Argument shifting
if ( $sql === null ) {
$sql = $bindings;
}
$stmt = $db->prepare( $sql );
//echo $sql;
// Bind parameters
if ( is_array( $bindings ) ) {
for ( $i=0, $ien=count($bindings) ; $i<$ien ; $i++ ) {
$binding = $bindings[$i];
$stmt->bindValue( $binding['key'], $binding['val'], $binding['type'] );
}
}
// Execute
try {
$stmt->execute();
}
catch (PDOException $e) {
SSP::fatal( "An SQL error occurred: ".$e->getMessage() );
}
// Return all
return $stmt->fetchAll();
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Internal methods
*/
/**
* Throw a fatal error.
*
* This writes out an error message in a JSON string which DataTables will
* see and show to the user in the browser.
*
* @param string $msg Message to send to the client
*/
static function fatal ( $msg )
{
echo json_encode( array(
"error" => $msg
) );
exit(0);
}
/**
* Create a PDO binding key which can be used for escaping variables safely
* when executing a query with sql_exec()
*
* @param array &$a Array of bindings
* @param * $val Value to bind
* @param int $type PDO field type
* @return string Bound key to be used in the SQL where this parameter
* would be used.
*/
static function bind ( &$a, $val, $type )
{
$key = ':binding_'.count( $a );
$a[] = array(
'key' => $key,
'val' => $val,
'type' => $type
);
return $key;
}
/**
* Pull a particular property from each assoc. array in a numeric array,
* returning and array of the property values from each item.
*
* @param array $a Array to get data from
* @param string $prop Property to read
* @return array Array of property values
*/
static function pluck ( $a, $prop )
{
$out = array();
for ( $i=0, $len=count($a) ; $i<$len ; $i++ ) {
$out[] = $a[$i][$prop];
}
return $out;
}
}
我一直收到一个错误，说代码找不到驱动程序虽然我已经安装了sqlserv和pdo_sqlsrv驱动程序但我的php环境。导致此错误的代码是否有问题？我的司机不正确吗？任何帮助都将不胜感激。我有超过65,000行的数据要处理，并且一次性将所有数据发送到客户端是不可能的。
答案 0 :(得分：10)
我花了一段时间但是我发现了我出错的地方，现在DataTables通过服务器端脚本使用SQL Server。我发布这个解决方案，希望它能帮助像我这样有问题的人。我把我的答案分成几部分。
PHP环境
可以找到php的SQLSRV驱动程序here。下载SQLSRV30.EXE安装程序包。您可能会发现，当您尝试运行此可执行文件时，您会收到错误＆＃34;这不是有效的win32应用程序＆＃34;如果是这种情况，请用7-zip解压缩可执行文件。生成的文件将包含您需要的文件。
当您解压缩包裹时，您需要选择正确的驱动程序。大多数Windows安装使用非线程安全驱动程序，这些驱动程序是：
php version 5.3：
php_sqlsrv_53_nts.dll
php_pdo_sqlsrv_53_nts.dll
php版本5.4：
php_sqlsrv_54_nts.dll
php_pdo_sqlsrv_54_nts.dll
将相应的文件复制到php目录中的ext文件夹中。现在修改您的php.ini文件以引用这些文件。通过在动态扩展部分下添加条目来完成此操作。结果将是这样的：
extension=php_sqlsrv_54_nts.dll
然后在模块部分设置下为驱动程序添加一个部分，如下所示：
[sqlsrv]
sqlsrv.LogSubSystems=-1
sqlsrv.LogSeverity=-1
sqlsrv.WarningsReturnAsErrors=0
可以找到这些设置的文档here。
添加这些驱动程序并在php.ini文件中添加对它们的引用后，还必须确保还安装了Microsoft SQL Server Client Profile 2012。
These Links have been taken from the PHP.net website:
Microsoft SQL Server Client Profile 2012 x86 Microsoft SQL Server Client profile 2012 x64
执行这些步骤后，请重新启动Web服务器。现在应该安装驱动程序并准备使用。您可以使用info.php页面进行检查。
服务器端脚本：
现在Web服务器已配置为使用SQL SRV驱动程序，我们现在可以使用它来查询SQL Server数据库。我使用了可用的服务器端脚本here。以下是我发现的一些问题：
<?php
/* Indexed column (used for fast and accurate table cardinality) */
$sIndexColumn = "";
/* DB table to use */
$sTable = "";
/* Database connection information */
$gaSql['user'] = "";
$gaSql['password'] = "";
$gaSql['db'] = "";
$gaSql['server'] = "";
/*
* Columns
* If you don't want all of the columns displayed you need to hardcode $aColumns array with your elements.
* If not this will grab all the columns associated with $sTable
*/
$aColumns = array();
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* If you just want to use the basic configuration for DataTables with PHP server-side, there is
* no need to edit below this line
*/
/*
* ODBC connection
*/
$connectionInfo = array("UID" => $gaSql['user'], "PWD" => $gaSql['password'], "Database"=>$gaSql['db'],"ReturnDatesAsStrings"=>true);
$gaSql['link'] = sqlsrv_connect( $gaSql['server'], $connectionInfo);
$params = array();
$options = array( "Scrollable" => SQLSRV_CURSOR_KEYSET );
/* Ordering */
$sOrder = "";
if ( isset( $_GET['iSortCol_0'] ) ) {
$sOrder = "ORDER BY ";
for ( $i=0 ; $i<intval( $_GET['iSortingCols'] ) ; $i++ ) {
if ( $_GET[ 'bSortable_'.intval($_GET['iSortCol_'.$i]) ] == "true" ) {
$sOrder .= $aColumns[ intval( $_GET['iSortCol_'.$i] ) ]."
".addslashes( $_GET['sSortDir_'.$i] ) .", ";
}
}
$sOrder = substr_replace( $sOrder, "", -2 );
if ( $sOrder == "ORDER BY" ) {
$sOrder = "";
}
}
/* Filtering */
$sWhere = "";
if ( isset($_GET['sSearch']) && $_GET['sSearch'] != "" ) {
$sWhere = "WHERE (";
for ( $i=0 ; $i<count($aColumns) ; $i++ ) {
$sWhere .= $aColumns[$i]." LIKE '%".addslashes( $_GET['sSearch'] )."%' OR ";
}
$sWhere = substr_replace( $sWhere, "", -3 );
$sWhere .= ')';
}
/* Individual column filtering */
for ( $i=0 ; $i<count($aColumns) ; $i++ ) {
if ( isset($_GET['bSearchable_'.$i]) && $_GET['bSearchable_'.$i] == "true" && $_GET['sSearch_'.$i] != '' ) {
if ( $sWhere == "" ) {
$sWhere = "WHERE ";
} else {
$sWhere .= " AND ";
}
$sWhere .= $aColumns[$i]." LIKE '%".addslashes($_GET['sSearch_'.$i])."%' ";
}
}
/* Paging */
$top = (isset($_GET['iDisplayStart']))?((int)$_GET['iDisplayStart']):0 ;
$limit = (isset($_GET['iDisplayLength']))?((int)$_GET['iDisplayLength'] ):10;
$sQuery = "SELECT TOP $limit ".implode(",",$aColumns)."
FROM $sTable
$sWhere ".(($sWhere=="")?" WHERE ":" AND ")." $sIndexColumn NOT IN
(
SELECT $sIndexColumn FROM
(
SELECT TOP $top ".implode(",",$aColumns)."
FROM $sTable
$sWhere
$sOrder
)
as [virtTable]
)
$sOrder";
$rResult = sqlsrv_query($gaSql['link'],$sQuery) or die("$sQuery: " . sqlsrv_errors());
$sQueryCnt = "SELECT * FROM $sTable $sWhere";
$rResultCnt = sqlsrv_query( $gaSql['link'], $sQueryCnt ,$params, $options) or die (" $sQueryCnt: " . sqlsrv_errors());
$iFilteredTotal = sqlsrv_num_rows( $rResultCnt );
$sQuery = " SELECT * FROM $sTable ";
$rResultTotal = sqlsrv_query( $gaSql['link'], $sQuery ,$params, $options) or die(sqlsrv_errors());
$iTotal = sqlsrv_num_rows( $rResultTotal );
$output = array(
"sEcho" => intval($_GET['sEcho']),
"iTotalRecords" => $iTotal,
"iTotalDisplayRecords" => $iFilteredTotal,
"aaData" => array()
);
while ( $aRow = sqlsrv_fetch_array( $rResult ) ) {
$row = array();
for ( $i=0 ; $i<count($aColumns) ; $i++ ) {
if ( $aColumns[$i] != ' ' ) {
$v = $aRow[ $aColumns[$i] ];
$v = mb_check_encoding($v, 'UTF-8') ? $v : utf8_encode($v);
$row[]=$v;
}
}
If (!empty($row)) { $output['aaData'][] = $row; }
}
echo json_encode( $output );
?>
索引列
指定要用于搜索的索引列时，请确保它包含在列数组中！如果在指定要使用哪些列时将其遗漏，则分页将不起作用。使用此代码进行数据表的分页工作是在不在另一个查询的TOP X结果中时对所有主键执行选择查询。
连接参数
确保连接参数完整且正确。这些是允许脚本连接到数据库所必需的。如果没有任何参数或参数对SQL服务器登录不正确，则该脚本将永远无法连接到数据库。
列数组
我发现在没有指定列的情况下使用此代码会返回错误或NULL数据。阻止这种情况的最好方法是使用我想要选择的列名填充数组，每个列都用引号括起来并用逗号分隔。还有理由将除了所需数据之外的任何内容发送回客户端吗？
客户端
<强> HTML
DataTables需要一个格式良好的html表来运行。这意味着拥有一个包含完整标签的表格。如果所有标签都没有返回的数据，那么DataTables将返回错误。如果您有要返回但未显示的列，则可以使用ColVis exntension并在java脚本中设置默认列视图设置。
Datatable使用自己的CCS文件，因此请确保包含它！
java脚本
DataTables使用Jquery及其自己的Javascrpt文件，因此请确保在脚本标记中包含对它们的引用！
//Datatables Basic server side initilization
$(document).ready(function () {
//Datatable
var table = $('#tableID').DataTable({
"bProcessing": true,
"bServerSide": true,
"sAjaxSource": "serverSideScript.php"
});
});
这些是此服务器端脚本工作所需的基本功能。它将使用您在php页面中指定的数据库参数在初始绘制时获得前10行。您可以在此处添加所需的扩展程序，例如ColVis和TableTools。可以找到这些扩展的完整文档和数据表的其他初始化选项here。
我希望这个答案可以帮助那些遇到同样问题的人。