我们如何编写 PHP 脚本以释放 MySQL 结果关联的光标内存?
众所周知,PHP 使用 msql_free_result() 函数来释放与 MySQL 结果关联的光标内存。为了说明这一点,我们有以下示例 -
示例
在此示例中,我们编写了以下 PHP 脚本,它将从名为“Tutorials_tbl”的表中获取记录后释放内存。
<?php $dbhost = 'localhost:3036'; $dbuser = 'root'; $dbpass = 'rootpassword'; $conn = mysql_connect($dbhost, $dbuser, $dbpass); if(! $conn ) { die('Could not connect: ' . mysql_error()); } $sql = 'SELECT tutorial_id, tutorial_title, tutorial_author, submission_date FROM tutorials_tbl'; mysql_select_db('TUTORIALS'); $retval = mysql_query( $sql, $conn ); if(! $retval ) { die('Could not get data: ' . mysql_error()); } while($row = mysql_fetch_array($retval, MYSQL_NUM)) { echo "Tutorial ID :{$row[0]} <br> ". "Title: {$row[1]} <br> ". "Author: {$row[2]} <br> ". "Submission Date : {$row[3]} <br> ". "--------------------------------<br>"; } mysql_free_result($retval); echo "Fetched data successfully
"; mysql_close($conn); ?>
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