classi prepare() bind_param() come passargli i dati

[gaza1960]

Buongiorno a tutti, ogni tanto ritorna la voglia di provare a fare cose diverse e molte volte da soli non si riesce.

Come da titolo volevo utilizzare le classi usando prepare() dind_param() execute(), ho provato per 2 giorni senza ottenere risultati. Ho trovato una class che utilizza questi comandi ma non so come passargli e ottenere i dati.

        public function insert($table, $data, $format) {
            // Check for $table or $data not set
            if ( empty( $table ) || empty( $data ) ) {
                return false;
            }
            
            // Connect to the database
            $db = $this->connect();
            
            // Cast $data and $format to arrays
            $data = (array) $data;
            $format = (array) $format;
            
            // Build format string
            $format = implode('', $format);
            $format = str_replace('%', '', $format);
            
            list( $fields, $placeholders, $values ) = $this->prep_query($data);
            
            // Prepend $format onto $values
            array_unshift($values, $format);

            // Prepary our query for binding
            $stmt = $db->prepare("INSERT INTO {$table} ({$fields}) VALUES ({$placeholders})");

            // Dynamically bind values
            call_user_func_array( array( $stmt, 'bind_param'), $this->ref_values($values));
            
            // Execute the query
            $stmt->execute();
            
            // Check for successful insertion
            if ( $stmt->affected_rows ) {
                return true;
            }
            
            return false;
        }

    public function query($query) {
        $db = $this->connect();
        $result = $db->query($query);
            
        while ( $row = $result->fetch_object() ) {
            $results[] = $row;
        }
            
        return $results;
    } 

su $table non ho dubbi
su $data e $format non saprei come mettere i dati
nessuna idea su $results[] = $row;

        public function update($table, $data, $format, $where, $where_format) {
            // Check for $table or $data not set
            if ( empty( $table ) || empty( $data ) ) {
                return false;
            }
            
            // Connect to the database
            $db = $this->connect();
            
            // Cast $data and $format to arrays
            $data = (array) $data;
            $format = (array) $format;
            
            // Build format array
            $format = implode('', $format); 
            $format = str_replace('%', '', $format);
            $where_format = implode('', $where_format); 
            $where_format = str_replace('%', '', $where_format);
            $format .= $where_format;
            
            list( $fields, $placeholders, $values ) = $this->prep_query($data, 'update');
            
            //Format where clause
            $where_clause = '';
            $where_values = '';
            $count = 0;
            
            foreach ( $where as $field => $value ) {
                if ( $count > 0 ) {
                    $where_clause .= ' AND ';
                }
                
                $where_clause .= $field . '=?';
                $where_values[] = $value;
                
                $count++;
            }

            // Prepend $format onto $values
            array_unshift($values, $format);
            $values = array_merge($values, $where_values);

            // Prepary our query for binding
            $stmt = $db->prepare("UPDATE {$table} SET {$placeholders} WHERE {$where_clause}");
            
            // Dynamically bind values
            call_user_func_array( array( $stmt, 'bind_param'), $this->ref_values($values));
            
            // Execute the query
            $stmt->execute();
            
            // Check for successful insertion
            if ( $stmt->affected_rows ) {
                return true;
            }
            
            return false;
        }
        public function select($query, $data, $format) {
            // Connect to the database
            $db = $this->connect();
            
            //Prepare our query for binding
            $stmt = $db->prepare($query);
            
            //Normalize format
            $format = implode('', $format); 
            $format = str_replace('%', '', $format);
            
            // Prepend $format onto $values
            array_unshift($data, $format);
            
            //Dynamically bind values
            call_user_func_array( array( $stmt, 'bind_param'), $this->ref_values($data));
            
            //Execute the query
            $stmt->execute();
            
            //Fetch results
            $result = $stmt->get_result();
            
            //Create results object
            while ($row = $result->fetch_object()) {
                $results[] = $row;
            }

            return $results;
        }
        public function delete($table, $id) {
            // Connect to the database
            $db = $this->connect();
            
            // Prepary our query for binding
            $stmt = $db->prepare("DELETE FROM {$table} WHERE ID = ?");
            
            // Dynamically bind values
            $stmt->bind_param('d', $id);
            
            // Execute the query
            $stmt->execute();
            
            // Check for successful insertion
            if ( $stmt->affected_rows ) {
                return true;
            }
        }
        private function prep_query($data, $type='insert') {
            // Instantiate $fields and $placeholders for looping
            $fields = '';
            $placeholders = '';
            $values = array();
            
            // Loop through $data and build $fields, $placeholders, and $values            
            foreach ( $data as $field => $value ) {
                $fields .= "{$field},";
                $values[] = $value;
                
                if ( $type == 'update') {
                    $placeholders .= $field . '=?,';
                } else {
                    $placeholders .= '?,';
                }
                
            }
            
            // Normalize $fields and $placeholders for inserting
            $fields = substr($fields, 0, -1);
            $placeholders = substr($placeholders, 0, -1);
            
            return array( $fields, $placeholders, $values );
        }
        private function ref_values($array) {
            $refs = array();

            foreach ($array as $key => $value) {
                $refs[$key] = &$array[$key]; 
            }

            return $refs; 
        } 

In sostanza tutto quello che viene passato dentro le parentesi tonde ($table, $id) non so come metterlo

e vorrei capire come visualizzare i dati provenienti da select.

Ringrazio tutti e capisco se qualcuno mi manderà....