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PHP. Руководство по PHP. 2005

maxdb_fetch_field

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След.

maxdb_fetch_field

(PECL)maxdb_fetch_field

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

Description

Procedural style:mixed maxdb_fetch_field (resource result)

Object oriented style (method):class result {

mixed fetch_field (void)

}

The maxdb_fetch_field() returns the definition of one column

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

information about all columns in the result set.

maxdb_fetch_field() returns FALSE when no more fields

are left.

Return values

Returns an resource which contains field definition informations or FALSE if no field information

is available.

Таблица 1. Object properties

PropertyDescription
nameThe name of the column
max_lengthThe maximum width of the field for the result set.
typeThe data type used for this field
decimalsThe number of decimals used (for integer fields)

See also

maxdb_num_fields()

maxdb_fetch_field_direct()

maxdb_fetch_fields()

maxdb_field_seek()

Example

Пример 1. Object oriented style

<?php

$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

/* check connection */

if (maxdb_connect_errno()){

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

exit();

}

$query = "SELECT name, cno from hotel.customer ORDER BY cno";

if ($result = $maxdb->query($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 */

$maxdb->close();

?>

Пример 2. Procedural style

<?php

$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

/* check connection */

if (maxdb_connect_errno()){

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

exit();

}

$query = "SELECT name, cno from hotel.customer ORDER BY cno";

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

/* Get field information for all fields */

while ($finfo = maxdb_fetch_field($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);

}

maxdb_free_result($result);

}

/* close connection */

maxdb_close($link);

?>

The above examples would produce the following output: 

Name: NAME

Table:

max. Len: 10

Flags: -1

Type: 2

Name: CNO

Table:

max. Len: 4

Flags: -1

Type: 0

Пред.

Начало

След.

maxdb_fetch_field_direct

Уровень выше

maxdb_fetch_fields

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

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