DB_common::getRow()
Synopsis
array &getRow (
string $query
,
array $params = array()
,
integer $fetchmode
= DB_FETCHMODE_DEFAULT
)
Описание
Runs the query provided and puts the first row of data into an array then frees the result set.
Parameter
-
string
$query -
the SQL query or the statement to prepare
-
array
$params -
array to be used in execution of the statement. Quantity of array elements must match quantity of placeholders in query.
If supplied, prepare()/ execute() is used.
This method does not allow scalars to be used for this argument.
-
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
-
Return value
array - the first row's data in an array
or a DB_Error object on failure.
The array may be ordered or associative depending on
$fetchmode.
The column index starts at 0 for ordered arrays.
Throws
| Error code | Error message | Reason | Solution |
|---|---|---|---|
| DB_ERROR_INVALID | invalid | SQL statement 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 statement. |
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 chosen. | Check the DSN in connect(). |
| every other error code | Database specific error | Check the database related section of PHP-Руководство to detect the reason for this error. In the most cases a misformed SQL statement. Ie. using LIMIT in a SQL-Statement for an Oracle database. |
Замечание
This function can not be called statically.
Пример
Using getRow() with
$fetchmode =
DB_FETCHMODE_ORDERED
<?php
// Once you have a valid DB object named $db...
$data =& $db->getRow('SELECT cf, df FROM foo',
array(), DB_FETCHMODE_ORDERED);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?>
Output:
Array
(
[0] => Juan
[1] => 1991-01-11 21:31:41
)
Using getRow() with
$fetchmode =
DB_FETCHMODE_ASSOC
<?php
// Once you have a valid DB object named $db...
$data =& $db->getRow('SELECT cf, df FROM foo',
array(), DB_FETCHMODE_ASSOC);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?>
Output:
Array
(
[cf] => Juan
[df] => 1991-01-11 21:31:41
)
Using getRow() with
$fetchmode =
DB_FETCHMODE_OBJECT
<?php
// Once you have a valid DB object named $db...
$data =& $db->getRow('SELECT cf, df FROM foo',
array(), DB_FETCHMODE_OBJECT);
if (PEAR::isError($data)) {
die($data->getMessage());
}
print_r($data);
?>
Output:
stdClass Object
(
[cf] => Juan
[df] => 1991-01-11 21:31:41
)
Using getRow() with one placeholder
<?php
// Once you have a valid DB object named $db...
$data =& $db->getRow('SELECT cf, df FROM foo WHERE nf = ?',
array(5));
if (PEAR::isError($data)) {
die($data->getMessage());
}
?>
Using getRow() with two placeholders
<?php
// Once you have a valid DB object named $db...
$data =& $db->getRow('SELECT cf, df FROM foo WHERE nf IN (?, ?)',
array(5, 10));
if (PEAR::isError($data)) {
die($data->getMessage());
}
?>