Php/docs/function.pg-free-result
来自菜鸟教程
pg_free_result
(PHP 4 >= 4.2.0, PHP 5, PHP 7)
pg_free_result — 释放查询结果占用的内存
说明
pg_free_result
( resource $result
) : bool
pg_free_result() 仅在当你担心脚本执行时占用了过多内存时调用。脚本执行完毕后所有的查询结果占用的内存都会被自动释放。不过如果你确认在脚本中不会再用到查询结果了，你可以用 result 作为参数调用 pg_free_result() 来释放有关的内存。成功时返回 true， 或者在失败时返回 false。
Note:
本函数以前的名字为
pg_freeresult()。
参见 pg_query()。
参数
result- PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
返回值
成功时返回 true， 或者在失败时返回 false。
范例
Example #1 pg_free_result() example
<?php$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
