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PHP. Руководство по PHP. 2005 (создание и продвижение сайта)
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PHP. Руководство по PHP. 2005

mysqli_fetch_field_direct

Пред.

След.

mysqli_fetch_field_direct

(PHP 5)mysqli_fetch_field_direct

(no version information, might be only in CVS)result->fetch_field_direct --

Fetch meta-data for a single field

Description

Procedural style:object mysqli_fetch_field_direct (mysqli_result result, int fieldnr)

Object oriented style (method):class mysqli_result {

object fetch_field_direct (int fieldnr)

}

mysqli_fetch_field_direct() returns an object which contains

field definition informations from specified resultset. The value of fieldnr must be in the

range from 0 to number of fields - 1.

Возвращаемые значения

Returns an object which contains field definition information or FALSE if no field information

for specified fieldnr is available.

Таблица 1. Object attributes
AttributeDescription
nameThe name of the column
orgnameOriginal column name if an alias was specified
tableThe name of the table this field belongs to (if not calculated)
orgtableOriginal table name if an alias was specified
defThe default value for this field, represented as a string
max_lengthThe maximum width of the field for the result set.
flagsAn integer representing the bit-flags for the field.
typeThe data type used for this field
decimalsThe number of decimals used (for integer fields)

Смотрите также

mysqli_num_fields(),

mysqli_fetch_field() и

mysqli_fetch_fields().

Примеры

Пример 1. Object oriented style

<?php

$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */

if (mysqli_connect_errno()){

printf("Connect failed: %s\n", mysqli_connect_error());

exit();

}

$query = "SELECT Name, SurfaceArea from Country ORDER BY Name LIMIT 5";

if ($result = $mysqli->query($query)){

/* Get field information for column 'SurfaceArea' */

$finfo = $result->fetch_field_direct(1);

printf("Name: %s\n", $finfo->name);

printf("Table: %s\n", $finfo->table);

printf("max. Len: %d\n", $finfo->max_length);

printf("Flags: %d\n", $finfo->flags);

printf("Type: %d\n", $finfo->type);

$result->close();

}

/* close connection */

$mysqli->close();

?>

Пример 2. Procedural style

<?php

$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */

if (mysqli_connect_errno()){

printf("Connect failed: %s\n", mysqli_connect_error());

exit();

}

$query = "SELECT Name, SurfaceArea from Country ORDER BY Name LIMIT 5";

if ($result = mysqli_query($link, $query)){

/* Get field information for column 'SurfaceArea' */

$finfo = mysqli_fetch_field_direct($result, 1);

printf("Name: %s\n", $finfo->name);

printf("Table: %s\n", $finfo->table);

printf("max. Len: %d\n", $finfo->max_length);

printf("Flags: %d\n", $finfo->flags);

printf("Type: %d\n", $finfo->type);

mysqli_free_result($result);

}

/* close connection */

mysqli_close($link);

?>

Результат выполнения данного примера:
Name: SurfaceArea

Table: Country

max. Len: 10

Flags: 32769

Type: 4

Пред.

Начало

След.

mysqli_fetch_assoc

Уровень выше

mysqli_fetch_field

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

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