The mysqli_result class
(PHP 5)
Introduction
Represents the result set obtained from a query against the database.
Changelog
| Version | Description |
|---|---|
| 5.4.0 | Iterator support was added, as mysqli_result now implements Traversable. |
Class synopsis
mysqli_result
implements
Traversable
{
/* Properties */
int $current_field
;
int $field_count;
array $lengths;
int $num_rows;
/* Methods */
}Table of Contents
- mysqli_result::$current_field — Get current field offset of a result pointer
- mysqli_result::data_seek — Adjusts the result pointer to an arbitrary row in the result
- mysqli_result::fetch_all — Fetches all result rows as an associative array, a numeric array, or both
- mysqli_result::fetch_array — Fetch a result row as an associative, a numeric array, or both
- mysqli_result::fetch_assoc — Fetch a result row as an associative array
- mysqli_result::fetch_field_direct — Fetch meta-data for a single field
- mysqli_result::fetch_field — Returns the next field in the result set
- mysqli_result::fetch_fields — Returns an array of objects representing the fields in a result set
- mysqli_result::fetch_object — Returns the current row of a result set as an object
- mysqli_result::fetch_row — Get a result row as an enumerated array
- mysqli_result::$field_count — Get the number of fields in a result
- mysqli_result::field_seek — Set result pointer to a specified field offset
- mysqli_result::free — Frees the memory associated with a result
- mysqli_result::$lengths — Returns the lengths of the columns of the current row in the result set
- mysqli_result::$num_rows — Gets the number of rows in a result
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения для работы с базами данных
- Расширения для работы с базами данных отдельных производителей
- MySQL Drivers and Plugins
- Введение
- Краткий обзор
- Краткое руководство
- Установка и настройка
- Расширение mysqli и постоянные соединения
- Предопределенные константы
- Notes
- Основная информация о функциях расширения MySQLi
- Examples
- Класс mysqli
- The mysqli_stmt class
- The mysqli_result class
- Класс mysqli_driver
- Класс mysqli_warning
- The mysqli_sql_exception class
- Синонимы и устаревшие Функции Mysqli
- Список изменений
Коментарии
Extending the MySQLi_Result
<?php
class Database_MySQLi extends MySQLi
{
public function query($query)
{
$this->real_query($query);
return new Database_MySQLi_Result($this);
}
}
class Database_MySQLi_Result extends MySQLi_Result
{
public function fetch()
{
return $this->fetch_assoc();
}
public function fetchAll()
{
$rows = array();
while($row = $this->fetch())
{
$rows[] = $row;
}
return $rows;
}
}
?>
Converting an old project from using the mysql extension to the mysqli extension, I found the most annoying change to be the lack of a corresponding mysql_result function in mysqli. While mysql_result is a generally terrible function, it was useful for fetching a single result field *value* from a result set (for example, if looking up a user's ID).
The behavior of mysql_result is approximated here, though you may want to name it something other than mysqli_result so as to avoid thinking it's an actual, built-in function.
<?php
function mysqli_result($res, $row, $field=0) {
$res->data_seek($row);
$datarow = $res->fetch_array();
return $datarow[$field];
}
?>
Implementing it via the OO interface is left as an exercise to the reader.
An "mysqli_result" function where $field can be like table_name.field_name with alias or not.<?php
function mysqli_result($result,$row,$field=0) {
if ($result===false) return false;
if ($row>=mysqli_num_rows($result)) return false;
if (is_string($field) && !(strpos($field,".")===false)) {
$t_field=explode(".",$field);
$field=-1;
$t_fields=mysqli_fetch_fields($result);
for ($id=0;$id<mysqli_num_fields($result);$id++) {
if ($t_fields[$id]->table==$t_field[0] && $t_fields[$id]->name==$t_field[1]) {
$field=$id;
break;
}
}
if ($field==-1) return false;
}
mysqli_data_seek($result,$row);
$line=mysqli_fetch_array($result);
return isset($line[$field])?$line[$field]:false;
}
?>
Switching from Php5 to Php7, especially if you have worked on an ongoing, long term project, it is unfortunate that there is no mysqli_result function.
So, this may be helpfull and you can call this function as you wish. I assume you do restricted search (searching for single row or few rows only).
function mysqli_result($search, $row, $field){
$i=0; while($results=mysqli_fetch_array($search)){
if ($i==$row){$result=$results[$field];}
$i++;}
return $result;}
Simply;
$search=mysqli_query($connection, "select name from table_name where id='7'");
$name=mysqli_result($search, 0, "id");
Best wishes,