DB_common::getAssoc() -- Runs a query and returns the data as an array
Описание
Runs the query provided and puts the
entire result set into an associative array
then frees the result set.
If the result set contains more than two columns, the value
will be an array of the values from column 2 to n. If the result
set contains only two columns, the returned value will be a
scalar with the value of the second column (unless forced to an
array with the $force_array parameter).
Параметр
- string
$query
the SQL query or the statement to prepare
- boolean
$force_array
used only if the query returns
exactly two columns.
If TRUE, the values of the returned array
will be one-element arrays instead of scalars.
- mixed
$params
array, string or numeric data to be added to the prepared statement.
Quantity of items passed must match quantity of placeholders in the
prepared statement: meaning 1 placeholder for non-array
parameters or 1 placeholder per array element.
If supplied,
prepare()/
execute() is used.
- integer
$fetchmode
the fetch mode to use.
The default is DB_FETCHMODE_DEFAULT,
which tells this method to use DB's current fetch mode.
DB's current default fetch mode can be changed using
setFetchMode().
Potential values include:
DB_FETCHMODE_ORDERED
DB_FETCHMODE_ASSOC
DB_FETCHMODE_OBJECT
- boolean
$group
if TRUE, the values of
the returned array is wrapped in another array.
If the same key value (in the first column)
repeats itself, the values
will be appended to this array instead
of overwriting the
existing values.
Возвращаемое значение
array - associative array with the query results
or a DB_Error object on failure
Throws
Таблица 35-1. Возможные значения PEAR_Error
| Error code |
Error message |
Reason |
Solution |
| DB_ERROR_INVALID |
invalid
|
SQL statment for preparing is not valid.
|
See the
prepare() documentation,
if you want to use a SQL statemt using placeholders.
|
| DB_ERROR_MISMATCH |
mismatch
|
Quantity of parameters didn't match quantity of placeholders in
the prepared statment.
|
Check that the number of placeholders in the
prepare() statement passed to
$query equals the count of entries
passed to $params.
|
| DB_ERROR_NODBSELECTED |
no database selected
|
No database was choosen.
|
Check the DSN
in
connect().
|
| DB_ERROR_TRUNCATED |
truncated
|
The result set contains fewer then two columns
|
Check the SQL query or choose another
get*() function
|
| every other error code |
|
Database specific error
|
Check the database related section of
PHP-Manual
to detect the reason for this error. In the most cases
a misformed SQL statment. Ie. using LIMIT in a SQL-Statment
for an Oracle database.
|
Заметка
Эта функция не должна вызываться статически.
Пример
All of the examples use the following data set:
INSERT INTO foo VALUES ('Juan', 5, '1991-01-11 21:31:41');
INSERT INTO foo VALUES ('Kyu', 10, '1992-02-12 22:32:42');
INSERT INTO foo VALUES ('Kyu', 15, '1993-03-13 23:33:43'); |
Result sets having two columns
When using getAssoc() for results
which have two columns and
$force_array = FALSE (the default)
changing $fetchmode has no
impact on the format of the resulting array.
Пример 35-1.
Using getAssoc() in default mode
<?php
// Once you have a valid DB object named $db...
$data =& $db->getAssoc('SELECT cf, df FROM foo');
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?> |
Output:
Array
(
[Juan] => 1991-01-11 21:31:41
[Kyu] => 1993-03-13 23:33:43
) |
|
Пример 35-2.
Using getAssoc() with
$group = TRUE
<?php
// Once you have a valid DB object named $db...
$data =& $db->getAssoc('SELECT cf, df FROM foo',
false, array(), DB_FETCHMODE_ORDERED, true);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?> |
Output:
Array
(
[Juan] => Array
(
[0] => 1991-01-11 21:31:41
)
[Kyu] => Array
(
[0] => 1992-02-12 22:32:42
[1] => 1993-03-13 23:33:43
)
) |
|
Пример 35-5.
Using getAssoc() with
$force_array = TRUE
and $fetchmode =
DB_FETCHMODE_OBJECT
<?php
// Once you have a valid DB object named $db...
$data =& $db->getAssoc('SELECT cf, df FROM foo',
true, array(), DB_FETCHMODE_OBJECT);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?> |
Output:
Array
(
[Juan] => stdClass Object
(
[cf] => Juan
[df] => 1991-01-11 21:31:41
)
[Kyu] => stdClass Object
(
[cf] => Kyu
[df] => 1993-03-13 23:33:43
)
) |
|
Пример 35-8.
Using getAssoc() with
$force_array = TRUE,
$fetchmode =
DB_FETCHMODE_OBJECT
and $group = TRUE
<?php
// Once you have a valid DB object named $db...
$data =& $db->getAssoc('SELECT cf, df FROM foo',
true, array(), DB_FETCHMODE_OBJECT, true);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?> |
Output:
Array
(
[Juan] => Array
(
[0] => stdClass Object
(
[cf] => Juan
[df] => 1991-01-11 21:31:41
)
)
[Kyu] => Array
(
[0] => stdClass Object
(
[cf] => Kyu
[df] => 1992-02-12 22:32:42
)
[1] => stdClass Object
(
[cf] => Kyu
[df] => 1993-03-13 23:33:43
)
)
) |
|
Result sets having more than two columns
Пример 35-9.
Using getAssoc() with
$fetchmode =
DB_FETCHMODE_ORDERED
<?php
// Once you have a valid DB object named $db...
$data =& $db->getAssoc('SELECT cf, nf, df FROM foo',
false, array(), DB_FETCHMODE_ORDERED);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?> |
Output:
Array
(
[Juan] => Array
(
[0] => 5
[1] => 1991-01-11 21:31:41
)
[Kyu] => Array
(
[0] => 15
[1] => 1993-03-13 23:33:43
)
) |
|
Пример 35-10.
Using getAssoc() with
$fetchmode =
DB_FETCHMODE_ASSOC
<?php
// Once you have a valid DB object named $db...
$data =& $db->getAssoc('SELECT cf, nf, df FROM foo',
false, array(), DB_FETCHMODE_ASSOC);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?> |
Output:
Array
(
[Juan] => Array
(
[nf] => 5
[df] => 1991-01-11 21:31:41
)
[Kyu] => Array
(
[nf] => 15
[df] => 1993-03-13 23:33:43
)
) |
|
Пример 35-11.
Using getAssoc() with
$fetchmode =
DB_FETCHMODE_OBJECT
<?php
// Once you have a valid DB object named $db...
$data =& $db->getAssoc('SELECT cf, nf, df FROM foo',
false, array(), DB_FETCHMODE_OBJECT);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?> |
Output:
Array
(
[Juan] => stdClass Object
(
[cf] => Juan
[nf] => 5
[df] => 1991-01-11 21:31:41
)
[Kyu] => stdClass Object
(
[cf] => Kyu
[nf] => 15
[df] => 1993-03-13 23:33:43
)
) |
|
Пример 35-12.
Using getAssoc() with
$fetchmode =
DB_FETCHMODE_ORDERED
and $group = TRUE
<?php
// Once you have a valid DB object named $db...
$data =& $db->getAssoc('SELECT cf, nf, df FROM foo',
false, array(), DB_FETCHMODE_ORDERED, true);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?> |
Output:
Array
(
[Juan] => Array
(
[0] => Array
(
[0] => 5
[1] => 1991-01-11 21:31:41
)
)
[Kyu] => Array
(
[0] => Array
(
[0] => 10
[1] => 1992-02-12 22:32:42
)
[1] => Array
(
[0] => 15
[1] => 1993-03-13 23:33:43
)
)
) |
|
Пример 35-13.
Using getAssoc() with
$fetchmode =
DB_FETCHMODE_ASSOC
and $group = TRUE
<?php
// Once you have a valid DB object named $db...
$data =& $db->getAssoc('SELECT cf, nf, df FROM foo',
false, array(), DB_FETCHMODE_ASSOC, true);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?> |
Output:
Array
(
[Juan] => Array
(
[0] => Array
(
[nf] => 5
[df] => 1991-01-11 21:31:41
)
)
[Kyu] => Array
(
[0] => Array
(
[nf] => 10
[df] => 1992-02-12 22:32:42
)
[1] => Array
(
[nf] => 15
[df] => 1993-03-13 23:33:43
)
)
) |
|
Пример 35-14.
Using getAssoc() with
$fetchmode =
DB_FETCHMODE_OBJECT
and $group = TRUE
<?php
// Once you have a valid DB object named $db...
$data =& $db->getAssoc('SELECT cf, nf, df FROM foo',
false, array(), DB_FETCHMODE_OBJECT, true);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?> |
Output:
Array
(
[Juan] => Array
(
[0] => stdClass Object
(
[cf] => Juan
[nf] => 5
[df] => 1991-01-11 21:31:41
)
)
[Kyu] => Array
(
[0] => stdClass Object
(
[cf] => Kyu
[nf] => 10
[df] => 1992-02-12 22:32:42
)
[1] => stdClass Object
(
[cf] => Kyu
[nf] => 15
[df] => 1993-03-13 23:33:43
)
)
) |
|