webapp/resources/datatables-1.9.4/examples/server_side/scripts/server_processing.php

   1 <?php
   2         /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   3          * Easy set variables
   4          */
   5
   6         /* Array of database columns which should be read and sent back to DataTables. Use a space where
   7          * you want to insert a non-database field (for example a counter or static image)
   8          */
   9         $aColumns = array( 'engine', 'browser', 'platform', 'version', 'grade' );
  10
  11         /* Indexed column (used for fast and accurate table cardinality) */
  12         $sIndexColumn = "id";
  13
  14         /* DB table to use */
  15         $sTable = "ajax";
  16
  17         /* Database connection information */
  18         $gaSql['user']       = "";
  19         $gaSql['password']   = "";
  20         $gaSql['db']         = "";
  21         $gaSql['server']     = "localhost";
  22
  23         /* REMOVE THIS LINE (it just includes my SQL connection user/pass) */
  24         include( $_SERVER['DOCUMENT_ROOT']."/datatables/mysql.php" );
  25
  26
  27         /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  28          * If you just want to use the basic configuration for DataTables with PHP server-side, there is
  29          * no need to edit below this line
  30          */
  31
  32         /*
  33          * Local functions
  34          */
  35         function fatal_error ( $sErrorMessage = '' )
  36         {
  37                 header( $_SERVER['SERVER_PROTOCOL'] .' 500 Internal Server Error' );
  38                 die( $sErrorMessage );
  39         }
  40
  41
  42         /*
  43          * MySQL connection
  44          */
  45         if ( ! $gaSql['link'] = mysql_pconnect( $gaSql['server'], $gaSql['user'], $gaSql['password']  ) )
  46         {
  47                 fatal_error( 'Could not open connection to server' );
  48         }
  49
  50         if ( ! mysql_select_db( $gaSql['db'], $gaSql['link'] ) )
  51         {
  52                 fatal_error( 'Could not select database ' );
  53         }
  54
  55         /*
  56          * Paging
  57          */
  58         $sLimit = "";
  59         if ( isset( $_GET['iDisplayStart'] ) && $_GET['iDisplayLength'] != '-1' )
  60         {
  61                 $sLimit = "LIMIT ".intval( $_GET['iDisplayStart'] ).", ".
  62                         intval( $_GET['iDisplayLength'] );
  63         }
  64
  65
  66         /*
  67          * Ordering
  68          */
  69         $sOrder = "";
  70         if ( isset( $_GET['iSortCol_0'] ) )
  71         {
  72                 $sOrder = "ORDER BY  ";
  73                 for ( $i=0 ; $i<intval( $_GET['iSortingCols'] ) ; $i++ )
  74                 {
  75                         if ( $_GET[ 'bSortable_'.intval($_GET['iSortCol_'.$i]) ] == "true" )
  76                         {
  77                                 $sOrder .= "`".$aColumns[ intval( $_GET['iSortCol_'.$i] ) ]."` ".
  78                                         ($_GET['sSortDir_'.$i]==='asc' ? 'asc' : 'desc') .", ";
  79                         }
  80                 }
  81
  82                 $sOrder = substr_replace( $sOrder, "", -2 );
  83                 if ( $sOrder == "ORDER BY" )
  84                 {
  85                         $sOrder = "";
  86                 }
  87         }
  88
  89
  90         /*
  91          * Filtering
  92          * NOTE this does not match the built-in DataTables filtering which does it
  93          * word by word on any field. It's possible to do here, but concerned about efficiency
  94          * on very large tables, and MySQL's regex functionality is very limited
  95          */
  96         $sWhere = "";
  97         if ( isset($_GET['sSearch']) && $_GET['sSearch'] != "" )
  98         {
  99                 $sWhere = "WHERE (";
 100                 for ( $i=0 ; $i<count($aColumns) ; $i++ )
 101                 {
 102                         if ( isset($_GET['bSearchable_'.$i]) && $_GET['bSearchable_'.$i] == "true" )
 103                         {
 104                                 $sWhere .= "`".$aColumns[$i]."` LIKE '%".mysql_real_escape_string( $_GET['sSearch'] )."%' OR ";
 105                         }
 106                 }
 107                 $sWhere = substr_replace( $sWhere, "", -3 );
 108                 $sWhere .= ')';
 109         }
 110
 111         /* Individual column filtering */
 112         for ( $i=0 ; $i<count($aColumns) ; $i++ )
 113         {
 114                 if ( isset($_GET['bSearchable_'.$i]) && $_GET['bSearchable_'.$i] == "true" && $_GET['sSearch_'.$i] != '' )
 115                 {
 116                         if ( $sWhere == "" )
 117                         {
 118                                 $sWhere = "WHERE ";
 119                         }
 120                         else
 121                         {
 122                                 $sWhere .= " AND ";
 123                         }
 124                         $sWhere .= "`".$aColumns[$i]."` LIKE '%".mysql_real_escape_string($_GET['sSearch_'.$i])."%' ";
 125                 }
 126         }
 127
 128
 129         /*
 130          * SQL queries
 131          * Get data to display
 132          */
 133         $sQuery = "
 134                 SELECT SQL_CALC_FOUND_ROWS `".str_replace(" , ", " ", implode("`, `", $aColumns))."`
 135                 FROM   $sTable
 136                 $sWhere
 137                 $sOrder
 138                 $sLimit
 139                 ";
 140         $rResult = mysql_query( $sQuery, $gaSql['link'] ) or fatal_error( 'MySQL Error: ' . mysql_errno() );
 141
 142         /* Data set length after filtering */
 143         $sQuery = "
 144                 SELECT FOUND_ROWS()
 145         ";
 146         $rResultFilterTotal = mysql_query( $sQuery, $gaSql['link'] ) or fatal_error( 'MySQL Error: ' . mysql_errno() );
 147         $aResultFilterTotal = mysql_fetch_array($rResultFilterTotal);
 148         $iFilteredTotal = $aResultFilterTotal[0];
 149
 150         /* Total data set length */
 151         $sQuery = "
 152                 SELECT COUNT(`".$sIndexColumn."`)
 153                 FROM   $sTable
 154         ";
 155         $rResultTotal = mysql_query( $sQuery, $gaSql['link'] ) or fatal_error( 'MySQL Error: ' . mysql_errno() );
 156         $aResultTotal = mysql_fetch_array($rResultTotal);
 157         $iTotal = $aResultTotal[0];
 158
 159
 160         /*
 161          * Output
 162          */
 163         $output = array(
 164                 "sEcho" => intval($_GET['sEcho']),
 165                 "iTotalRecords" => $iTotal,
 166                 "iTotalDisplayRecords" => $iFilteredTotal,
 167                 "aaData" => array()
 168         );
 169
 170         while ( $aRow = mysql_fetch_array( $rResult ) )
 171         {
 172                 $row = array();
 173                 for ( $i=0 ; $i<count($aColumns) ; $i++ )
 174                 {
 175                         if ( $aColumns[$i] == "version" )
 176                         {
 177                                 /* Special output formatting for 'version' column */
 178                                 $row[] = ($aRow[ $aColumns[$i] ]=="0") ? '-' : $aRow[ $aColumns[$i] ];
 179                         }
 180                         else if ( $aColumns[$i] != ' ' )
 181                         {
 182                                 /* General output */
 183                                 $row[] = $aRow[ $aColumns[$i] ];
 184                         }
 185                 }
 186                 $output['aaData'][] = $row;
 187         }
 188
 189         echo json_encode( $output );
 190 ?>