PHP: oci_fetch_all

Description

oci_fetch_all(
    resource $statement,
    array &$output,
    int $offset = 0,
    int $limit = -1,
    int $flags = OCI_FETCHSTATEMENT_BY_COLUMN | OCI_ASSOC
): int

Fetches multiple rows from a query into a two-dimensional array. By default, all rows are returned.

This function can be called only once for each query executed with oci_execute().

Parameters

statement

A valid OCI8 statement identifier created by oci_parse() and executed by oci_execute(), or a REF CURSOR statement identifier.

output

The variable to contain the returned rows.

LOB columns are returned as strings, where Oracle supports conversion.

See oci_fetch_array() for more information on how data and types are fetched.

offset

The number of initial rows to discard when fetching the result. The default value is 0, so the first row onwards is returned.

limit

The number of rows to return. The default is -1 meaning return all the rows from offset + 1 onwards.

flags

Parameter flags indicates the array structure and whether associative arrays should be used.

**oci_fetch_all()** Array Structure Modes
Constant	Description
`OCI_FETCHSTATEMENT_BY_ROW`	The outer array will contain one sub-array per query row.
`OCI_FETCHSTATEMENT_BY_COLUMN`	The outer array will contain one sub-array per query column. This is the default.

Arrays can be indexed either by column heading or numerically. Only one index mode will be returned.

**oci_fetch_all()** Array Index Modes
Constant	Description
`OCI_NUM`	Numeric indexes are used for each column's array.
`OCI_ASSOC`	Associative indexes are used for each column's array. This is the default.

Use the addition operator "+" to choose a combination of array structure and index modes.

Oracle's default, non-case sensitive column names will have uppercase array keys. Case-sensitive column names will have array keys using the exact column case. Use var_dump() on output to verify the appropriate case to use for each query.

Queries that have more than one column with the same name should use column aliases. Otherwise only one of the columns will appear in an associative array.

Return Values

Returns the number of rows in output, which may be 0 or more.

Examples

Example #1 oci_fetch_all() example

<?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 POSTAL_CODE, CITY FROM locations WHERE ROWNUM < 3');
oci_execute($stid);

$nrows = oci_fetch_all($stid, $res);

echo "$nrows rows fetched<br>\n";
var_dump($res);

// var_dump output is:
//    2 rows fetched
//    array(2) {
//      ["POSTAL_CODE"]=>
//      array(2) {
//        [0]=>
//        string(6) "00989x"
//        [1]=>
//        string(6) "10934x"
//      }
//      ["CITY"]=>
//      array(2) {
//        [0]=>
//        string(4) "Roma"
//        [1]=>
//        string(6) "Venice"
//      }
//    }

// Pretty-print the results
echo "<table border='1'>\n";
foreach ($res as $col) {
    echo "<tr>\n";
    foreach ($col as $item) {
        echo "    <td>".($item !== null ? htmlentities($item, ENT_QUOTES) : "")."</td>\n";
    }
    echo "</tr>\n";
}
echo "</table>\n";

oci_free_statement($stid);
oci_close($conn);

?>

Example #2 oci_fetch_all() example with OCI_FETCHSTATEMENT_BY_ROW

<?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 POSTAL_CODE, CITY FROM locations WHERE ROWNUM < 3');
oci_execute($stid);

$nrows = oci_fetch_all($stid, $res, null, null, OCI_FETCHSTATEMENT_BY_ROW);

echo "$nrows rows fetched<br>\n";
var_dump($res);

// Output is:
//    2 rows fetched
//    array(2) {
//      [0]=>
//      array(2) {
//        ["POSTAL_CODE"]=>
//        string(6) "00989x"
//        ["CITY"]=>
//        string(4) "Roma"
//      }
//      [1]=>
//      array(2) {
//        ["POSTAL_CODE"]=>
//        string(6) "10934x"
//        ["CITY"]=>
//        string(6) "Venice"
//      }
//    }

oci_free_statement($stid);
oci_close($conn);

?>

Example #3 oci_fetch_all() 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 POSTAL_CODE, CITY FROM locations WHERE ROWNUM < 3');
oci_execute($stid);

$nrows = oci_fetch_all($stid, $res, null, null, OCI_FETCHSTATEMENT_BY_ROW + OCI_NUM);

echo "$nrows rows fetched<br>\n";
var_dump($res);

// Output is:
//    2 rows fetched
//    array(2) {
//      [0]=>
//      array(2) {
//        [0]=>
//        string(6) "00989x"
//        [1]=>
//        string(4) "Roma"
//      }
//      [1]=>
//      array(2) {
//        [0]=>
//        string(6) "10934x"
//        [1]=>
//        string(6) "Venice"
//      }
//    }

oci_free_statement($stid);
oci_close($conn);

?>

Notes

Note:
Using offset is very inefficient. All the rows to be skipped are included in the result set that is returned from the database to PHP. They are then discarded. It is more efficient to use SQL to restrict the offset and range of rows in the query. See oci_fetch_array() for an example.

Note:
Queries that return a large number of rows can be more memory efficient if a single-row fetching function like oci_fetch_array() is used.

Note:
For queries returning a large number of rows, performance can be significantly improved by increasing oci8.default_prefetch or using oci_set_prefetch().

Note:
Will not return rows from Oracle Database 12c Implicit Result Sets. Use oci_fetch_array() instead.

oci_fetch_all

Description

Parameters

Return Values

Examples

Notes

See Also

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