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: /var/www/zenithentcare/stmedicosoftware/vendor/DataTables/server-side/scripts/ [ drwxrwxr-x ]
name : ssp.class.php <?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 */ // REMOVE THIS BLOCK - used for DataTables test environment only! $file = $_SERVER['DOCUMENT_ROOT'].'/datatables/pdo.php'; if ( is_file( $file ) ) { include( $file ); } 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; } /** * Database connection * * Obtain an PHP PDO connection from a connection details array * * @param array $conn SQL connection details. The array should have * the following properties * * host - host name * * db - database name * * user - user name * * pass - user password * @return resource PDO connection */ static function db ( $conn ) { if ( is_array( $conn ) ) { return self::sql_connect( $conn ); } return $conn; } /** * 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 = self::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; } } if ( count( $orderBy ) ) { $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 = self::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 = self::bind( $bindings, '%'.$str.'%', PDO::PARAM_STR ); $globalSearch[] = "`".$column['db']."` LIKE ".$binding; } } } // Individual column filtering if ( isset( $request['columns'] ) ) { 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 = self::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|PDO $conn PDO connection resource or connection parameters array * @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, $conn, $table, $primaryKey, $columns ) { $bindings = array(); $db = self::db( $conn ); // Build the SQL query string from the request $limit = self::limit( $request, $columns ); $order = self::order( $request, $columns ); $where = self::filter( $request, $columns, $bindings ); // Main query to actually get the data $data = self::sql_exec( $db, $bindings, "SELECT `".implode("`, `", self::pluck($columns, 'db'))."` FROM `$table` $where $order $limit" ); // Data set length after filtering $resFilterLength = self::sql_exec( $db, $bindings, "SELECT COUNT(`{$primaryKey}`) FROM `$table` $where" ); $recordsFiltered = $resFilterLength[0][0]; // Total data set length $resTotalLength = self::sql_exec( $db, "SELECT COUNT(`{$primaryKey}`) FROM `$table`" ); $recordsTotal = $resTotalLength[0][0]; /* * Output */ return array( "draw" => isset ( $request['draw'] ) ? intval( $request['draw'] ) : 0, "recordsTotal" => intval( $recordsTotal ), "recordsFiltered" => intval( $recordsFiltered ), "data" => self::data_output( $columns, $data ) ); } /** * The difference between this method and the `simple` one, is that you can * apply additional `where` conditions to the SQL queries. These can be in * one of two forms: * * * 'Result condition' - This is applied to the result set, but not the * overall paging information query - i.e. it will not effect the number * of records that a user sees they can have access to. This should be * used when you want apply a filtering condition that the user has sent. * * 'All condition' - This is applied to all queries that are made and * reduces the number of records that the user can access. This should be * used in conditions where you don't want the user to ever have access to * particular records (for example, restricting by a login id). * * @param array $request Data sent to server by DataTables * @param array|PDO $conn PDO connection resource or connection parameters array * @param string $table SQL table to query * @param string $primaryKey Primary key of the table * @param array $columns Column information array * @param string $whereResult WHERE condition to apply to the result set * @param string $whereAll WHERE condition to apply to all queries * @return array Server-side processing response array */ static function complex ( $request, $conn, $table, $primaryKey, $columns, $whereResult=null, $whereAll=null ) { $bindings = array(); $db = self::db( $conn ); $localWhereResult = array(); $localWhereAll = array(); $whereAllSql = ''; // Build the SQL query string from the request $limit = self::limit( $request, $columns ); $order = self::order( $request, $columns ); $where = self::filter( $request, $columns, $bindings ); $whereResult = self::_flatten( $whereResult ); $whereAll = self::_flatten( $whereAll ); if ( $whereResult ) { $where = $where ? $where .' AND '.$whereResult : 'WHERE '.$whereResult; } if ( $whereAll ) { $where = $where ? $where .' AND '.$whereAll : 'WHERE '.$whereAll; $whereAllSql = 'WHERE '.$whereAll; } // Main query to actually get the data $data = self::sql_exec( $db, $bindings, "SELECT `".implode("`, `", self::pluck($columns, 'db'))."` FROM `$table` $where $order $limit" ); // Data set length after filtering $resFilterLength = self::sql_exec( $db, $bindings, "SELECT COUNT(`{$primaryKey}`) FROM `$table` $where" ); $recordsFiltered = $resFilterLength[0][0]; // Total data set length $resTotalLength = self::sql_exec( $db, $bindings, "SELECT COUNT(`{$primaryKey}`) FROM `$table` ". $whereAllSql ); $recordsTotal = $resTotalLength[0][0]; /* * Output */ return array( "draw" => isset ( $request['draw'] ) ? intval( $request['draw'] ) : 0, "recordsTotal" => intval( $recordsTotal ), "recordsFiltered" => intval( $recordsFiltered ), "data" => self::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 $e) { self::fatal( "An error occurred while connecting to the database. ". "The error reported by the server was: ".$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 $e) { self::fatal( "An SQL error occurred: ".$e->getMessage() ); } // Return all return $stmt->fetchAll( PDO::FETCH_BOTH ); } /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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; } /** * Return a string from an array or a string * * @param array|string $a Array to join * @param string $join Glue for the concatenation * @return string Joined string */ static function _flatten ( $a, $join = ' AND ' ) { if ( ! $a ) { return ''; } else if ( $a && is_array($a) ) { return implode( $join, $a ); } return $a; } }