pg_free_result

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_free_result释放查询结果占用的内存

说明

pg_free_result(PgSql\Result $result): bool

pg_free_result() 释放与指定 PgSql\Result 实例关联的内存和数据。

仅当脚本执行期间的内存消耗成为问题时才需要调用此函数。否则,所有结果内存将在脚本结束时自动释放。

注意:

本函数以前的名字为 pg_freeresult()

参数

result

PgSql\Result 实例,由 pg_query()pg_query_params() 或者 pg_execute()(等)返回。

返回值

成功时返回 true, 或者在失败时返回 false

更新日志

版本 说明
8.1.0 现在 result 参数接受 PgSql\Result 实例,之前接受 资源(resource)

范例

示例 #1 pg_free_result() 示例

<?php
$db
= pg_connect("dbname=users user=me") || die();

$res = pg_query($db, "SELECT 1 UNION ALL SELECT 2");

$val = pg_fetch_result($res, 1, 0);

echo
"First field in the second row is: ", $val, "\n";

pg_free_result($res);
?>

以上例程会输出:

First field in the second row is: 2

参见

  • pg_query() - 执行查询
  • pg_query_params() - Submits a command to the server and waits for the result, with the ability to pass parameters separately from the SQL command text
  • pg_execute() - Sends a request to execute a prepared statement with given parameters, and waits for the result

add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top