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php - 为什么此 SQL 查询会抛出警告?

转载 作者:太空宇宙 更新时间:2023-11-03 11:18:47 25 4
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Possible Duplicate:
mysql_num_rows(): supplied argument is not a valid MySQL result resource

            $resultnx = mysql_query("SELECT * FROM `emails` WHERE `email` = '{$email}'");
$num_rows = mysql_num_rows($resultnx);

收到此警告 Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in ....

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