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<?php
/**
* Extension independent database result
*/
declare(strict_types=1);
namespace PhpMyAdmin\Dbal;
use Generator;
use mysqli_result;
use PhpMyAdmin\FieldMetadata;
use Webmozart\Assert\Assert;
use function array_column;
use function is_array;
use function is_bool;
use function is_string;
use function method_exists;
use const MYSQLI_ASSOC;
/**
* Extension independent database result
*/
final class MysqliResult implements ResultInterface
{
/**
* The result identifier produced by the DBiExtension
*
* @var mysqli_result|null $result
*/
private $result;
/**
* @param mysqli_result|bool $result
*/
public function __construct($result)
{
$this->result = is_bool($result) ? null : $result;
}
/**
* Returns a generator that traverses through the whole result set
* and returns each row as an associative array
*
* @psalm-return Generator<int, array<string, string|null>, mixed, void>
*/
public function getIterator(): Generator
{
if (! $this->result) {
return;
}
$this->result->data_seek(0);
/** @var array<string, string|null> $row */
foreach ($this->result as $row) {
yield $row;
}
}
/**
* Returns the next row of the result with associative keys
*
* @return array<string,string|null>
*/
public function fetchAssoc(): array
{
if (! $this->result) {
return [];
}
$row = $this->result->fetch_assoc();
return is_array($row) ? $row : [];
}
/**
* Returns the next row of the result with numeric keys
*
* @return array<int,string|null>
*/
public function fetchRow(): array
{
if (! $this->result) {
return [];
}
$row = $this->result->fetch_row();
return is_array($row) ? $row : [];
}
/**
* Returns a single value from the given result; false on error
*
* @param int|string $field
*
* @return string|false|null
*/
public function fetchValue($field = 0)
{
if (is_string($field)) {
$row = $this->fetchAssoc();
} else {
$row = $this->fetchRow();
}
return $row[$field] ?? false;
}
/**
* Returns all rows of the result
*
* @return array<int, array<string,string|null>>
*/
public function fetchAllAssoc(): array
{
if (! $this->result) {
return [];
}
// This function should return all rows, not only the remaining rows
$this->result->data_seek(0);
// Pre PHP 8.1 when compiled against libmysql doesn't support fetch_all
if (method_exists($this->result, 'fetch_all')) {
return $this->result->fetch_all(MYSQLI_ASSOC);
}
$rows = [];
while ($row = $this->result->fetch_assoc()) {
$rows[] = $row;
}
return $rows;
}
/**
* Returns values from the first column of each row
*
* @return array<int, string|null>
*/
public function fetchAllColumn(): array
{
if (! $this->result) {
return [];
}
// This function should return all rows, not only the remaining rows
$this->result->data_seek(0);
// Pre PHP 8.1 when compiled against libmysql doesn't support fetch_all
if (method_exists($this->result, 'fetch_all')) {
return array_column($this->result->fetch_all(), 0);
}
$rows = [];
while ($row = $this->result->fetch_row()) {
$rows[] = $row[0];
}
return $rows;
}
/**
* Returns values as single dimensional array where the key is the first column
* and the value is the second column, e.g.
* SELECT id, name FROM users
* produces: ['123' => 'John', '124' => 'Jane']
*
* @return array<string, string|null>
*/
public function fetchAllKeyPair(): array
{
if (! $this->result) {
return [];
}
Assert::greaterThanEq($this->result->field_count, 2);
// This function should return all rows, not only the remaining rows
$this->result->data_seek(0);
// Pre PHP 8.1 when compiled against libmysql doesn't support fetch_all
if (method_exists($this->result, 'fetch_all')) {
return array_column($this->result->fetch_all(), 1, 0);
}
$rows = [];
while ($row = $this->result->fetch_row()) {
$rows[$row[0] ?? ''] = $row[1];
}
return $rows;
}
/**
* Returns the number of fields in the result
*/
public function numFields(): int
{
if (! $this->result) {
return 0;
}
return $this->result->field_count;
}
/**
* Returns the number of rows in the result
*
* @return string|int
* @psalm-return int|numeric-string
*/
public function numRows()
{
if (! $this->result) {
return 0;
}
return $this->result->num_rows;
}
/**
* Adjusts the result pointer to an arbitrary row in the result
*
* @param int $offset offset to seek
*
* @return bool True if the offset exists, false otherwise
*/
public function seek(int $offset): bool
{
if (! $this->result) {
return false;
}
return $this->result->data_seek($offset);
}
/**
* returns meta info for fields in $result
*
* @return array<int, FieldMetadata> meta info for fields in $result
*/
public function getFieldsMeta(): array
{
if (! $this->result) {
return [];
}
$fields = [];
foreach ($this->result->fetch_fields() as $k => $field) {
$fields[$k] = new FieldMetadata($field->type, $field->flags, $field);
}
return $fields;
}
/**
* Returns the names of the fields in the result
*
* @return array<int, string> Fields names
*/
public function getFieldNames(): array
{
if (! $this->result) {
return [];
}
/** @var list<string> $column */
$column = array_column($this->result->fetch_fields(), 'name');
return $column;
}
}
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