pg_fetch_array
Fetch a row as an array
Description
array pg_fetch_array
( resource $result
[, int $row
[, int $result_type = PGSQL_BOTH
]] )
pg_fetch_array is an extended version of
pg_fetch_row. In addition to storing the
data in the numeric indices (field number) to the result array, it
can also store the data using associative indices (field name).
It stores both indicies by default.
Note: This function sets NULL fields to
the PHP NULL value.
pg_fetch_array is NOT significantly
slower than using pg_fetch_row, and
is significantly easier to use.
Parameters
-
result
-
PostgreSQL query result resource, returned by pg_query,
pg_query_params or pg_execute
(among others).
-
row
-
Row number in result to fetch. Rows are numbered from 0 upwards. If
omitted or NULL, the next row is fetched.
-
result_type
-
An optional parameter that controls
how the returned array is indexed.
result_type is a constant and can take the
following values: PGSQL_ASSOC,
PGSQL_NUM and PGSQL_BOTH.
Using PGSQL_NUM, pg_fetch_array
will return an array with numerical indices, using
PGSQL_ASSOC it will return only associative indices
while PGSQL_BOTH, the default, will return both
numerical and associative indices.
Return Values
An array indexed numerically (beginning with 0) or
associatively (indexed by field name), or both.
Each value in the array is represented as a
string. Database NULL
values are returned as NULL.
FALSE is returned if row exceeds the number
of rows in the set, there are no more rows, or on any other error.
Examples
Example #1 pg_fetch_array example
<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
echo "An error occurred.\n";
exit;
}
$result = pg_query($conn, "SELECT author, email FROM authors");
if (!$result) {
echo "An error occurred.\n";
exit;
}
$arr = pg_fetch_array($result, 0, PGSQL_NUM);
echo $arr[0] . " <- Row 1 Author\n";
echo $arr[1] . " <- Row 1 E-mail\n";
// The row parameter is optional; NULL can be passed instead,
// to pass a result_type. Successive calls to pg_fetch_array
// will return the next row.
$arr = pg_fetch_array($result, NULL, PGSQL_ASSOC);
echo $arr["author"] . " <- Row 2 Author\n";
echo $arr["email"] . " <- Row 2 E-mail\n";
$arr = pg_fetch_array($result);
echo $arr["author"] . " <- Row 3 Author\n";
echo $arr[1] . " <- Row 3 E-mail\n";
?>
See Also
- pg_fetch_row
- pg_fetch_object
- pg_fetch_result