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Последние активные темы форума |
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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
DescriptionПроцедурный стиль: mixed mysqli_fetch_field ( mysqli_result result ) Объектно-ориентированный стиль (method): class mysqli_result { mixed 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 значенияReturns 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) |
Примеры
Пример 1. Объектно-ориентированный стиль
<?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
();
?>
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|
Пример 2. Процедурный стиль
<?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
);
?>
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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 |
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