oci_fetch_array
(PHP 5, PECL OCI8 >= 1.1.0)
oci_fetch_array — Returns the next row from a query as an associative or numeric array
说明
array oci_fetch_array ( resource $statement [, int $mode ] )Returns an array containing the next result-set row of a query. Each array entry corresponds to a column of the row. This function is typically called in a loop until it returns FALSE, indicating no more rows exist.
要获取 OCI8 扩展进行数据类型映射的细节，请参见 驱动所支持的数据类型
参数
- statement
-
有效的 OCI8 报表标识符 由 oci_parse() 创建，被 oci_execute() 或 REF CURSOR statement 标识执行。
- mode
-
An optional second parameter can be any combination of the following constants:
oci_fetch_array() Modes Constant Description OCI_BOTH Returns an array with both associative and numeric indices. This is the same as OCI_ASSOC + OCI_NUM and is the default behavior. OCI_ASSOC Returns an associative array. OCI_NUM Returns a numeric array. OCI_RETURN_NULLS Creates elements for NULL fields. The element values will be a PHP NULL. OCI_RETURN_LOBS Returns the contents of LOBs instead of the LOB descriptors. The default mode is OCI_BOTH.
Use the addition operator "+" to specify more than one mode at a time.
返回值
Returns an array with associative and/or numeric indices. If there are no more rows in the statement then FALSE is returned.
By default, LOB columns are returned as LOB descriptors.
DATE columns are returned as strings formatted to the current date format. The default format can be changed with Oracle environment variables such as NLS_LANG or by a previously executed ALTER SESSION SET NLS_DATE_FORMAT command.
Oracle's default, non-case sensitive column names will have uppercase associative indices in the result array. Case-sensitive column names will have array indices using the exact column case. Use var_dump() on the result array to verify the appropriate case to use for each query.
范例
Example #1 oci_fetch_array() with OCI_BOTH
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$stid = oci_parse($conn, 'SELECT department_id, department_name FROM departments');
oci_execute($stid);
while (($row = oci_fetch_array($stid, OCI_BOTH))) {
// Use the uppercase column names for the associative array indices
echo $row[0] . " and " . $row['DEPARTMENT_ID'] . " are the same<br>
";
echo $row[1] . " and " . $row['DEPARTMENT_NAME'] . " are the same<br>
";
}
oci_free_statement($stid);
oci_close($conn);
?>
Example #2 oci_fetch_array() with OCI_NUM
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$stid = oci_parse($conn, 'SELECT id, description FROM mytab');
oci_execute($stid);
while (($row = oci_fetch_array($stid, OCI_NUM))) {
echo $row[0] . "<br>
";
echo $row[1]->read(11) . "<br>
"; // this will output first 11 bytes from DESCRIPTION
}
// Output is:
// 1
// A very long
oci_free_statement($stid);
oci_close($conn);
?>
Example #3 oci_fetch_array() with OCI_ASSOC
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$stid = oci_parse($conn, 'SELECT id, description FROM mytab');
oci_execute($stid);
while (($row = oci_fetch_array($stid, OCI_ASSOC))) {
echo $row['ID'] . "<br>
";
echo $row['DESCRIPTION']->read(11) . "<br>
"; // this will output first 11 bytes from DESCRIPTION
}
// Output is:
// 1
// A very long
oci_free_statement($stid);
oci_close($conn);
?>
Example #4 oci_fetch_array() with OCI_RETURN_NULLS
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$stid = oci_parse($conn, 'SELECT 1, null FROM dual');
oci_execute($stid);
while (($row = oci_fetch_array ($stid, OCI_ASSOC))) { // Ignore NULLs
var_dump($row);
}
$stid = oci_parse($conn, 'SELECT 1, null FROM dual');
oci_execute($stid);
while (($row = oci_fetch_array ($stid, OCI_ASSOC+OCI_RETURN_NULLS))) { // Fetch NULLs
var_dump($row);
}
?>
Example #5 oci_fetch_array() with OCI_RETURN_LOBS
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$stid = oci_parse($conn, 'SELECT id, description FROM mytab');
oci_execute($stid);
while (($row = oci_fetch_array($stid, OCI_ASSOC+OCI_RETURN_LOBS))) {
echo $row['ID'] . "<br>
";
echo $row['DESCRIPTION'] . "<br>
"; // this contains all of DESCRIPTION
}
// Output is:
// 1
// A very long string
oci_free_statement($stid);
oci_close($conn);
?>
Example #6 oci_fetch_array() with case sensitive column names
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$stid = oci_parse($conn, 'select * from mytab');
oci_execute($stid);
$row = oci_fetch_array($stid, OCI_ASSOC+OCI_RETURN_NULLS);
// Because 'Name' was created as a case-sensitive column, that same
// case is used for the array index. However uppercase 'CITY' must
// be used for the case-insensitive column index
print $row['Name'] . "<br>
"; // prints Chris
print $row['CITY'] . "<br>
"; // prints Melbourne
oci_free_statement($stid);
oci_close($conn);
?>
Example #7 oci_fetch_array() with columns having duplicate names
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$sql = 'SELECT mycity.name, mycountry.name
FROM mycity, mycountry
WHERE mycity.id = mycountry.id';
$stid = oci_parse($conn, $sql);
oci_execute($stid);
$row = oci_fetch_array($stid, OCI_ASSOC);
var_dump($row);
// Output only contains one "NAME" entry:
// array(1) {
// ["NAME"]=>
// string(9) "Australia"
// }
// To query a repeated column name, use an SQL column alias like "AS ctnm":
$sql = 'SELECT mycity.name AS ctnm, mycountry.name
FROM mycity, mycountry
WHERE mycity.id = mycountry.id';
$stid = oci_parse($conn, $sql);
oci_execute($stid);
$row = oci_fetch_array($stid, OCI_ASSOC);
var_dump($row);
// Output now contains both columns selected:
// array(2) {
// ["CTNM"]=>
// string(9) "Melbourne"
// ["NAME"]=>
// string(9) "Australia"
// }
oci_free_statement($stid);
oci_close($conn);
?>
Example #8 oci_fetch_array() with DATE columns
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
// Set the date format for this connection.
// For performance reasons, consider changing the format
// in a trigger or with environment variables instead
$stid = oci_parse($conn, "ALTER SESSION SET NLS_DATE_FORMAT = 'YYYY-MM-DD'");
oci_execute($stid);
$stid = oci_parse($conn, 'SELECT hire_date FROM employees WHERE employee_id = 188');
oci_execute($stid);
$row = oci_fetch_array($stid, OCI_ASSOC);
echo $row['HIRE_DATE'] . "<br>
"; // prints 1997-06-14
oci_free_statement($stid);
oci_close($conn);
?>
Example #9 oci_fetch_array() with REF CURSOR
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$stid = oci_parse($conn, 'BEGIN myproc(:rc); END;');
$refcur = oci_new_cursor($conn);
oci_bind_by_name($stid, ':rc', $refcur, -1, OCI_B_CURSOR);
oci_execute($stid);
// Execute the returned REF CURSOR and fetch from it like a statement identifier
oci_execute($refcur);
echo "<table border='1'>
";
while ($row = oci_fetch_array($refcur, OCI_ASSOC+OCI_RETURN_NULLS)) {
echo "<tr>
";
foreach ($row as $item) {
echo " <td>".($item !== null ? htmlentities($item, ENT_QUOTES) : " ")."</td>
";
}
echo "</tr>
";
}
echo "</table>
";
oci_free_statement($refcur);
oci_free_statement($stid);
oci_close($conn);
?>
Example #10 oci_fetch_array() with a LIMIT-like query
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
// This is the query you want to execute
$sql = 'SELECT city, postal_code FROM locations ORDER BY city';
// This nested query selects a subset of rows from $sql.
// In production environments, be careful to avoid SQL Injection
// issues with concatenated SQL statements
$limit_sql =
'select *
from ( select a.*, rownum as rnum
from (' . $sql . ') a
where rownum < :FIRST_ROW + :NUM_ROWS )
where rnum >= :FIRST_ROW';
$first = 1; // start with the first row
$num = 5; // return 5 rows
$stid = oci_parse($conn, $limit_sql);
oci_bind_by_name($stid, ':FIRST_ROW', $first);
oci_bind_by_name($stid, ':NUM_ROWS', $num);
oci_execute($stid);
while (($row = oci_fetch_array($stid, OCI_ASSOC))) {
echo $row['CITY'] . " " . $row['POSTAL_CODE'] . "<br>
";
}
// Output is:
// Beijing 190518x
// Bern 3095x
// Bombay 490231x
// Geneva 1730x
// Hiroshima 6823x
oci_free_statement($stid);
oci_close($conn);
?>
注释
Note:
Associative array indices need to be in uppercase for standard Oracle columns that were created with case insensitive names.
Note:
查询返回巨大数量的数据行时，通过增大 oci8.default_prefetch 值或使用 oci_set_prefetch() 可显著提高性能。
Note:
The function oci_fetch_array() is insignificantly slower than oci_fetch_assoc() or oci_fetch_row(), but is more flexible.
参见
- oci_fetch() - Fetches the next row into result-buffer
- oci_fetch_all() - 获取结果数据的所有行到一个数组
- oci_fetch_assoc() - Returns the next row from a query as an associative array
- oci_fetch_object() - Returns the next row from a query as an object
- oci_fetch_row() - Returns the next row from a query as a numeric array
- oci_set_prefetch() - 设置预提取行数
