employee-grid-data.php.bak

<?php
include_once 'dbconnect2.php';

$requestData= $_REQUEST;
$columns = array( 
// datatable column index  => database column name
	0 =>'username', 
	1 => 'credit'
);
// getting total number records without any search
$sql = "SELECT username,credit";
$sql.=" FROM player_credit";
$query=mysqli_query($conn, $sql) or die("employee-grid-data.php: get employees");
$totalData = mysqli_num_rows($query);
$totalFiltered = $totalData;  // when there is no search parameter then total number rows = total number filtered rows.
if( !empty($requestData['search']['value']) ) {
	// if there is a search parameter
	$sql = "SELECT username,credit ";
	$sql.=" FROM player_credit";
	$sql.=" WHERE username LIKE '".$requestData['search']['value']."%' ";    // $requestData['search']['value'] contains search parameter
	$sql.=" OR credit LIKE '".$requestData['search']['value']."%' ";
	$query=mysqli_query($conn, $sql) or die("employee-grid-data.php: get employees");
	$totalFiltered = mysqli_num_rows($query); // when there is a search parameter then we have to modify total number filtered rows as per search result without limit in the query 
	$sql.=" ORDER BY ". $columns[$requestData['order'][0]['column']]."   ".$requestData['order'][0]['dir']."   LIMIT ".$requestData['start']." ,".$requestData['length']."   "; // $requestData['order'][0]['column'] contains colmun index, $requestData['order'][0]['dir'] contains order such as asc/desc , $requestData['start'] contains start row number ,$requestData['length'] contains limit length.
	$query=mysqli_query($conn, $sql) or die("employee-grid-data.php: get employees"); // again run query with limit
	
} else {	
	$sql = "SELECT username,credit ";
	$sql.=" FROM player_credit";
	$sql.=" ORDER BY ". $columns[$requestData['order'][0]['column']]."   ".$requestData['order'][0]['dir']."   LIMIT ".$requestData['start']." ,".$requestData['length']."   ";
	$query=mysqli_query($conn, $sql) or die("employee-grid-data.php: get employees");
	
}
$data = array();
while( $row=mysqli_fetch_array($query) ) {  // preparing an array
	$nestedData=array(); 
	$nestedData[] = $row["username"];
	$nestedData[] = $row["credit"];
	
	$data[] = $nestedData;
}
$json_data = array(
			"draw"            => intval( $requestData['draw'] ),   // for every request/draw by clientside , they send a number as a parameter, when they recieve a response/data they first check the draw number, so we are sending same number in draw. 
			"recordsTotal"    => intval( $totalData ),  // total number of records
			"recordsFiltered" => intval( $totalFiltered ), // total number of records after searching, if there is no searching then totalFiltered = totalData
			"data"            => $data   // total data array
			);
echo json_encode($json_data);  // send data as json format
?>