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
Property 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)

Property	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_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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