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The mysqli_result class

(PHP 5, PHP 7, PHP 8)

Вступ

Represents the result set obtained from a query against the database.

Короткий огляд класу

class mysqli_result implements IteratorAggregate {
/* Властивості */
public readonly int $current_field;
public readonly int $field_count;
public readonly ?array $lengths;
public readonly int|string $num_rows;
public int $type;
/* Методи */
public __construct(mysqli $mysql, int $result_mode = MYSQLI_STORE_RESULT)
public data_seek(int $offset): bool
public fetch_all(int $mode = MYSQLI_NUM): array
public fetch_column(int $column = 0): null|int|float|string|false
public fetch_object(string $class = "stdClass", array $constructor_args = []): object|null|false
public field_seek(int $index): true
public free(): void
public close(): void
public free_result(): void
}

Властивості

type

Stores whether the result is buffered or unbuffered as an int (MYSQLI_STORE_RESULT or MYSQLI_USE_RESULT, respectively).

Журнал змін

Версія Опис
8.0.0 mysqli_result implements IteratorAggregate now. Previously, Traversable was implemented instead.

Зміст

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User Contributed Notes 4 notes

up
70
tuxedobob
12 years ago
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.
up
18
Cem Kayali / cemkayali(a)eticaret.com.tr
5 years ago
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,
up
14
Marc17
10 years ago
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;
}
?>
up
1
blar at blar dot de
15 years ago
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;
    }
}

?>
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