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Javascript DataTables problem with server_processing.php

Posted on 2013-06-08
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Last Modified: 2013-06-11
Hi
I'm trying to use the server_processing.php script to pull the data from the mySQL database. I have tried the following the example from site so I can understand why its not working.

I think the problem is some were in this code:
$(document).ready( function () {
	$('#table_id').dataTable({
    	"bSortClasses": false,
        "bProcessing": true,
        "bServerSide": true,
        "sAjaxSource": "server_processing.php"
    });
} );

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Because when I run the server_processing.php file in the browser it gets the data from the database and i have this code in the script and it echo's all the data: "return Json($output, \"application/json\");", but when I run the index.php with the above block of code there is not datadump meaning its not being executed.

here is the code for the 2 files.

index.php
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
	<title>Title</title>
	 
	<link rel="stylesheet" href="style.css"/>
	<style></style>
	<style type="text/css" title="currentStyle">
	    @import "DataTables/media/css/demo_table.css";
	</style>
 
	<script src="//localhost/scripts/jquery/jquery-1.9.1.js" type="text/javascript"></script>
	<script src="//localhost/scripts/jdatatable/jquery.dataTables.min.js" type="text/javascript"></script>
	<script src="//localhost/scripts/jeditable/jquery.jeditable.js" type="text/javascript"></script>
	<script src="//localhost/scripts/jui/jquery-ui.js" type="text/javascript"></script>
	<script src="//localhost/scripts/jvalidation/jquery.validate.js" type="text/javascript"></script>
	<script>
	
$(document).ready( function () {
	$('#table_id').dataTable({
    	"bSortClasses": false,
        "bProcessing": true,
        "bServerSide": true,
        "sAjaxSource": "server_processing.php"
    });

} );

	</script>
</head>
 
<body>
	<table cellpadding="0" cellspacing="0" border="0" class="display" id="table_id">
		<thead>
			<tr><th>JobID</th><th>Source</th><th>Customer</th><th>Ref</th><th>Product</th><th>Desc</th><th>Qty</th><th>Supplier</th><th>Cost</th><th>Status</th><th>DateLogged</th><th>LoggedBy</th><th>ETA</th><th>SentDate</th><th>CompDate</th><th>Delivery</th><th>Notes</th></tr>
		</thead>
		<tbody>
			<tr>
				<td colspan="17" class="dataTables_empty">Loading data from server</td>
			</tr>
		</tbody>
		<tfoot>
			<tr><th>JobID</th><th>Source</th><th>Customer</th><th>Ref</th><th>Product</th><th>Desc</th><th>Qty</th><th>Supplier</th><th>Cost</th><th>Status</th><th>DateLogged</th><th>LoggedBy</th><th>ETA</th><th>SentDate</th><th>CompDate</th><th>Delivery</th><th>Notes</th></tr>
		</tfoot>
	</table>

 
</body>
</html>

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server_processing.php
<?php
	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	 * Easy set variables
	 */
	
	/* Array of database columns which should be read and sent back to DataTables. Use a space where
	 * you want to insert a non-database field (for example a counter or static image)
	 */
	$aColumns = array( 'JobID','Source','Customer','Ref','Product','Desc','Qty','Supplier','Cost','Status','DateLogged','LoggedBy','ETA','SentDate','CompDate','Delivery','Notes' );


	/* Indexed column (used for fast and accurate table cardinality) */
	$sIndexColumn = "JobID";
	
	/* DB table to use */
	$sTable = "jobs";
	
	/* Database connection information */
	$gaSql['user']       = "";
	$gaSql['password']   = "";
	$gaSql['db']         = "jobstatus";
	$gaSql['server']     = "localhost";
	

	
	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	 * If you just want to use the basic configuration for DataTables with PHP server-side, there is
	 * no need to edit below this line
	 */
	
	/* 
	 * Local functions
	 */
	function fatal_error ( $sErrorMessage = '' )
	{
		header( $_SERVER['SERVER_PROTOCOL'] .' 500 Internal Server Error' );
		die( $sErrorMessage );
	}

	
	/* 
	 * MySQL connection
	 */
	if ( ! $gaSql['link'] = mysql_pconnect( $gaSql['server'], $gaSql['user'], $gaSql['password']  ) )
	{
		fatal_error( 'Could not open connection to server' );
	}

	if ( ! mysql_select_db( $gaSql['db'], $gaSql['link'] ) )
	{
		fatal_error( 'Could not select database ' );
	}

	/* 
	 * Paging
	 */
	$sLimit = "";
	if ( isset( $_GET['iDisplayStart'] ) && $_GET['iDisplayLength'] != '-1' )
	{
		$sLimit = "LIMIT ".intval( $_GET['iDisplayStart'] ).", ".
			intval( $_GET['iDisplayLength'] );
	}
	
	
	/*
	 * 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] ) ]."` ".
					($_GET['sSortDir_'.$i]==='asc' ? 'asc' : 'desc') .", ";
			}
		}
		
		$sOrder = substr_replace( $sOrder, "", -2 );
		if ( $sOrder == "ORDER BY" )
		{
			$sOrder = "";
		}
	}
	
	
	/* 
	 * Filtering
	 * 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, but concerned about efficiency
	 * on very large tables, and MySQL's regex functionality is very limited
	 */
	$sWhere = "";
	if ( isset($_GET['sSearch']) && $_GET['sSearch'] != "" )
	{
		$sWhere = "WHERE (";
		for ( $i=0 ; $i<count($aColumns) ; $i++ )
		{
			if ( isset($_GET['bSearchable_'.$i]) && $_GET['bSearchable_'.$i] == "true" )
			{
				$sWhere .= "`".$aColumns[$i]."` LIKE '%".mysql_real_escape_string( $_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[$i]."` LIKE '%".mysql_real_escape_string($_GET['sSearch_'.$i])."%' ";
		}
	}
	
	
	/*
	 * SQL queries
	 * Get data to display
	 */
	$sQuery = "
		SELECT SQL_CALC_FOUND_ROWS `".str_replace(" , ", " ", implode("`, `", $aColumns))."`
		FROM   $sTable
		$sWhere
		$sOrder
		$sLimit
		";
	$rResult = mysql_query( $sQuery, $gaSql['link'] ) or fatal_error( 'MySQL Error: ' . mysql_errno() );
	
	/* Data set length after filtering */
	$sQuery = "
		SELECT FOUND_ROWS()
	";
	$rResultFilterTotal = mysql_query( $sQuery, $gaSql['link'] ) or fatal_error( 'MySQL Error: ' . mysql_errno() );
	$aResultFilterTotal = mysql_fetch_array($rResultFilterTotal);
	$iFilteredTotal = $aResultFilterTotal[0];
	
	/* Total data set length */
	$sQuery = "
		SELECT COUNT(`".$sIndexColumn."`)
		FROM   $sTable
	";
	$rResultTotal = mysql_query( $sQuery, $gaSql['link'] ) or fatal_error( 'MySQL Error: ' . mysql_errno() );
	$aResultTotal = mysql_fetch_array($rResultTotal);
	$iTotal = $aResultTotal[0];
	
	
	/*
	 * Output
	 */
	$output = array(
		"sEcho" => intval($_GET['sEcho']),
		"iTotalRecords" => $iTotal,
		"iTotalDisplayRecords" => $iFilteredTotal,
		"aaData" => array()
	);
	
	while ( $aRow = mysql_fetch_array( $rResult ) )
	{
		$row = array();
		for ( $i=0 ; $i<count($aColumns) ; $i++ )
		{
			if ( $aColumns[$i] == "version" )
			{
				/* Special output formatting for 'version' column */
				$row[] = ($aRow[ $aColumns[$i] ]=="0") ? '-' : $aRow[ $aColumns[$i] ];
			}
			else if ( $aColumns[$i] != ' ' )
			{
				/* General output */
				$row[] = $aRow[ $aColumns[$i] ];
			}
		}
		$output['aaData'][] = $row;
	}
	
	echo "<script>";
	echo "return Json($output, \"application/json\");";
	echo "</script>";
	
	echo json_encode( $output );
?>

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Question by:ACEAFTY
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8 Comments
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 39232400
Comment out these three lines.
echo "<script>";
echo "return Json($output, \"application/json\");";
echo "</script>";

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They don't do anything and also won't ever be executed.  It's not part of the JSON so it interferes with it.  Just let the next line return the JSON.
0
 
LVL 1

Author Comment

by:ACEAFTY
ID: 39232413
I just added that for debugging, Its so I tell if The Script has been executed but nothing is happening When the index.php file runs.
0
 
LVL 83

Accepted Solution

by:
Dave Baldwin earned 500 total points
ID: 39232418
When you run 'server_processing.php' by itself without those lines you should see the JSON on the screen.
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LVL 83

Expert Comment

by:Dave Baldwin
ID: 39232419
This page http://www.datatables.net/release-datatables/examples/data_sources/ajax.html says:
DataTables expects an object with an array called "aaData" with the data source.
0
 
LVL 1

Author Comment

by:ACEAFTY
ID: 39232700
Hi,
For some reason its loading the data now which is good, but when I insert the additional code to allow row highlighting when hovering or incelling editing, adding/deleting rows, that was working when originally i used a static html table isn't working any more??

index.php - with the additional code
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
	<title>Title</title>
	 
	<link rel="stylesheet" href="style.css"/>
	<style>

		#table_id tbody tr.highlighted:hover{
		    background-color: #00f;
		}
		
	</style>
	<style type="text/css" title="currentStyle">
	    @import "DataTables/media/css/demo_table.css";
	</style>
 
	<script src="//localhost/scripts/jquery/jquery-1.9.1.js" type="text/javascript"></script>
	<script src="//localhost/scripts/jdatatable/jquery.dataTables.min.js" type="text/javascript"></script>
	<script src="//localhost/scripts/jeditable/jquery.jeditable.js" type="text/javascript"></script>
	<script src="//localhost/scripts/jui/jquery-ui.js" type="text/javascript"></script>
	<script src="//localhost/scripts/jvalidation/jquery.validate.js" type="text/javascript"></script>
	<script>
		var oTable1;
		
		$(document).ready( function () {
			var oTable = $('#table_id').dataTable({
		    	"bSortClasses": false,
		        "bProcessing": true,
		        "bServerSide": true,
		        "sAjaxSource": "server_processing.php"
		    });

		    oTable.$('tr').hover( function() {
		        var iCol = $('td', this.parentNode).index(this) % 17;
		        oTable.$('tr').addClass( 'highlighted' );
		    }, function() {
		        oTable.$('tr.highlighted').removeClass('highlighted');
		    } );




		    /* Add a click handler to the rows - this could be used as a callback */
		    $("#table_id tbody tr").click( function( e ) {
		        if ( $(this).hasClass('row_selected') ) {
		            $(this).removeClass('row_selected');
		        }
		        else {
		            oTable1.$('tr.row_selected').removeClass('row_selected');
		            $(this).addClass('row_selected');
		        }
		    });
		     
		    /* Add a click handler for the delete row */
		    $('#delete').click( function() {
		        var anSelected = fnGetSelected( oTable );
		        if ( anSelected.length !== 0 ) {
		            oTable1.fnDeleteRow( anSelected[0] );
		        }
		    } );

		    /* Init the table */
		    oTable1 = $('#table_id').dataTable( );





		    /* Apply the jEditable handlers to the table */
		    oTable1.$('td').editable( 'editable_ajax.php', {
		        "callback": function( sValue, y ) {
		            var aPos = oTable1.fnGetPosition( this );
		            oTable1.fnUpdate( sValue, aPos[0], aPos[1] );
		        },
		        "submitdata": function ( value, settings ) {
		            return {
		                "row_id": this.parentNode.getAttribute('id'),
		                "column": oTable1.fnGetPosition( this )[2]
		            };
		        },
		        "height": "14px",
		        "width": "100%"
		    } );

		
		} );

		/* Get the rows which are currently selected */
		function fnGetSelected( oTableLocal )
		{
		    return oTableLocal.$('tr.row_selected');
		}
		
		
		function fnClickAddRow() {
		    $('#table_id').dataTable().fnAddData( [
		
			"4",
			"Source",
			"Customer",
			"Ref",
			"Product",
			"Desc",
			"Qty",
			"Supplier",
			"Cost",
			"Status",
			"DateLogged",
			"LoggedBy",
			"ETA",
			"SentDate",
			"CompDate",
			"Delivery",
			"Notes"
		
		    ] );
		}		


	</script>
</head>
 
<body>
	<div><a onclick="fnClickAddRow();" href="javascript:void(0);">Click to add a new row</a><br><a id="delete" href="javascript:void(0)">Delete selected row</a><br><br></div>
	
	<table cellpadding="0" cellspacing="0" border="0" class="display" id="table_id">
		<thead>
			<tr><th>JobID</th><th>Source</th><th>Customer</th><th>Ref</th><th>Product</th><th>Desc</th><th>Qty</th><th>Supplier</th><th>Cost</th><th>Status</th><th>DateLogged</th><th>LoggedBy</th><th>ETA</th><th>SentDate</th><th>CompDate</th><th>Delivery</th><th>Notes</th></tr>
		</thead>
		<tbody>
			<tr>
				<td colspan="17" class="dataTables_empty">Loading data from server</td>
			</tr>
		</tbody>
		<tfoot>
			<tr><th>JobID</th><th>Source</th><th>Customer</th><th>Ref</th><th>Product</th><th>Desc</th><th>Qty</th><th>Supplier</th><th>Cost</th><th>Status</th><th>DateLogged</th><th>LoggedBy</th><th>ETA</th><th>SentDate</th><th>CompDate</th><th>Delivery</th><th>Notes</th></tr>
		</tfoot>
	</table>

 
</body>
</html>

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0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 39233089
My guess would be that it is conflicting with the 'datatables' code.  Often with a framework like that, you have to use their methods.  In their examples http://www.datatables.net/examples/ , they have a link to "Highlight rows and columns".
0
 
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Author Comment

by:ACEAFTY
ID: 39237048
Hi
Not having much luck with this, but the original problem has been fixed, thank you. I'll post another questions for any further issues.
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 39237064
You're welcome, thanks for the points.
0

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