MySQL -显示计数结果

Question

我只是想在MySQL (PHP)中显示一个咨询结果。守则是：

$example = mysql_query("SELECT count(*) as text FROM table WHERE name = '$name'");
$qtd = mysql_num_rows($example);
while($data = mysql_fetch_array($qtd)){
$count = $data["text"];
}

echo "<h3>($count)</h3>";

错误:警告: mysql_num_rows()：提供的参数不是第9行C:\AppServ\www\Site\index.php中有效的MySQL结果资源

Answer 1

改变这个

 while($data = mysql_fetch_array($qtd)){
 $count = $data["text"];
 }

至

while($data = mysql_fetch_array($example)){
 $count = $data["text"];
  }

编辑:，您不需要在这里执行EDIT循环。

你就应该这样做

     $example = mysql_query("SELECT count(*) as text FROM table WHERE name = '$name'");
     $data = mysql_fetch_array($example) ;
     $count = $data["text"];
     echo "<h3>".$count."</h3>";

Answer 2

这应该是可行的，您不需要使用while语句。

$query = mysql_query("SELECT * FROM table WHERE name = '$name'");
$count = mysql_num_rows($query);
echo $count;