PHP - Manual: oci_fetch_all

2024-11-14

oci_fetch_all

(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)

oci_fetch_all — 获取结果数据的所有行到一个数组

说明

oci_fetch_all(
    resource $statement,
    array &$output,
    int $skip = ?,
    int $maxrows = ?,
    int $flags = ?
): int

oci_fetch_all() 从一个结果中获取所有的行到一个用户定义的数组。oci_fetch_all() 返回获取的行数，出错则返回 false。skip 是从结果中获取数据时，最开始忽略的行数（默认值是 0，即从第一行开始）。maxrows 是要读取的行数，从第 skip 行开始（默认值是 -1，即所有行）。

flags 参数可以是下列值的任意组合：

OCI_FETCHSTATEMENT_BY_ROW
OCI_FETCHSTATEMENT_BY_COLUMN（默认值）
OCI_NUM
OCI_ASSOC

示例 #1 oci_fetch_all() 例子


<?php
/* oci_fetch_all example mbritton at verinet dot com (990624) */

$conn = oci_connect("scott", "tiger");

$stmt = oci_parse($conn, "select * from emp");

oci_execute($stmt);

$nrows = oci_fetch_all($stmt, $results);
if ($nrows > 0) {
   echo "<table border=\"1\">\n";
   echo "<tr>\n";
   foreach ($results as $key => $val) {
      echo "<th>$key</th>\n";
   }
   echo "</tr>\n";

   for ($i = 0; $i < $nrows; $i++) {
      echo "<tr>\n";
      foreach ($results as $data) {
         echo "<td>$data[$i]</td>\n";
      }
      echo "</tr>\n";
   }
   echo "</table>\n";
} else {
   echo "No data found<br />\n";
}
echo "$nrows Records Selected<br />\n";

oci_free_statement($stmt);
oci_close($conn);
?>

oci_fetch_all() 如果出错则返回 false。

注意:
在 PHP 5.0.0 之前的版本必须使用 ocifetchstatement() 替代本函数。该函数名仍然可用，为向下兼容作为 oci_fetch_all() 的别名。不过其已被废弃，不推荐使用。

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。

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.

skip

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

maxrows

The number of rows to return. The default is -1 meaning return all the rows from skip + 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 by column heading or numerically.

**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.

返回值

Returns the number of rows in output, which may be 0 or more, 或者在失败时返回 false.

范例

示例 #2 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);

?>

示例 #3 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);

?>

示例 #4 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);

?>

注释

注意:
Using skip 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.

注意:
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.

注意:
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。

注意:
In PHP versions before 5.0.0 you must use ocifetchstatement() instead.

参见

oci_fetch() - Fetches the next row into result-buffer
oci_fetch_array() - Returns the next row from a query as an associative or numeric array
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

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User Contributed Notes 2 notes

down

eustaquiorangel at gmail dot com ¶

8 years ago


Beware that only numerically indexed results will be returned if
OCI_NUM is used.

down

david at boeke dot com ¶

18 years ago


The Skip and MaxRows parameters were not added until version 4.2.1.

Previous versions of php used this syntax:


           int ocifetchstatement ( resource stmt, array &output)


The function also took a third parameter that was not documented.  ( I assume that it was a flag)

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官方地址：https://www.php.net/manual/en/function.oci-fetch-all.php

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oci_fetch_all

说明

参数

返回值

范例

注释

参见

User Contributed Notes 2 notes