从mysql表中列出数据

Question

我正在尝试列出来自mysql的数据

但我收到错误：

"Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in /home/cassiano/public_html/myradio.net.br/events.php on line 114"

我无法在此处粘贴代码，总是出错，请参阅notepad code

谢谢

Answer 1

您在代码中使用了给定语句

  $total_playlist = mysql_num_rows(mysql_query("SELECT * FROM agenda_playlist where codigo_stm = '".$dados_stm["codigo"]."' ORDER by login"));

这里

 mysql_query("SELECT * FROM agenda_playlist where codigo_stm = '".$dados_stm["codigo"]."' ORDER by login")

将输出您需要修改的空结果

试一下

$total_playlist = 0;
$res_count = mysql_query("SELECT count(*) as cnt FROM agenda_playlist where codigo_stm = '".$dados_stm["codigo"]."' ORDER by login");
if($row_count = mysql_fetch_assoc($res_count))
{
   $total_playlist = $row_count['cnt'];
}

而不是

$total_playlist = mysql_num_rows(mysql_query("SELECT * FROM agenda_playlist where codigo_stm = '".$dados_stm["codigo"]."' ORDER by login"));