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
Attribute Description
name The name of the column
orgname Original column name if an alias was specified
table The name of the table this field belongs to (if not calculated)
orgtable Original table name if an alias was specified
def The default value for this field, represented as a string
max_length The maximum width of the field for the result set.
flags An integer representing the bit-flags for the field.
type The data type used for this field
decimals The number of decimals used (for integer fields)

Attribute	Description
name	The name of the column
orgname	Original column name if an alias was specified
table	The name of the table this field belongs to (if not calculated)
orgtable	Original table name if an alias was specified
def	The default value for this field, represented as a string
max_length	The maximum width of the field for the result set.
flags	An integer representing the bit-flags for the field.
type	The data type used for this field
decimals	The 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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