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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

Пред.

След.

mysqli_fetch_field

(PHP 5)mysqli_fetch_field

(no version information, might be only in CVS)result->fetch_field -- Returns the next field in the result set

Description

Procedural style:object mysqli_fetch_field (mysqli_result result)

Object oriented style (method):class mysqli_result {

object fetch_field (void)

}

The mysqli_fetch_field() returns the definition of one column

of a result set as an object. Call this function repeatedly to retrieve

information about all columns in the result set.

mysqli_fetch_field() returns FALSE when no more fields

are left.

Возвращаемые значения

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

is available.

Таблица 1. Object properties
PropertyDescription
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_direct(),

mysqli_fetch_fields() и

mysqli_field_seek().

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 Code LIMIT 5";

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

/* Get field information for all columns */

while ($finfo = $result->fetch_field()){

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\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 Code LIMIT 5";

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

/* Get field information for all fields */

while ($finfo = mysqli_fetch_field($result)){

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\n", $finfo->type);

}

mysqli_free_result($result);

}

/* close connection */

mysqli_close($link);

?>

Результат выполнения данного примера:
Name: Name

Table: Country

max. Len: 11

Flags: 1

Type: 254

Name: SurfaceArea

Table: Country

max. Len: 10

Flags: 32769

Type: 4

Пред.

Начало

След.

mysqli_fetch_field_direct

Уровень выше

mysqli_fetch_fields

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

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