[英]How do I need to return the query in order to count the number of rows, and how do I count the rows?
[英]How do I count query result rows?
我應該用什么替換“如果查詢結果行是 = 1 的代碼來驗證”?
我已經嘗試了很多使用 num_rows 的方法,但它不起作用。
我的PHP代碼:
$con=mysqli_connect("localhost","mbrconsu_un394x","y1cz9,rd+hf6","mbrconsu_mmx");
if (mysqli_connect_errno($con))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$usuario = $con->real_escape_string($_GET['usuario']);
$senha = $con->real_escape_string($_GET['senha']);
$query = mysqli_query($con, "SELECT * FROM 'login' WHERE usuario = '$usuario' AND senha='$senha'");
if(CODE TO VERIFY IF QUERY RESULT ROW IS = 1){
while($row = mysqli_fetch_assoc($query)){
$db_username = $row['usuario'];
$db_password = $row['senha'];
}
if($usuario == $db_username && $senha == $db_password){
return true;
}
} else {
return false;
}
mysqli_close($con);
?>
$query->num_rows;
或者
mysqli_num_rows($query);
你可以做
if($row = mysqli_fetch_assoc($query)) {
}
您也可能希望將您的用戶名和密碼作為常量保存在一個文件中
你也可以使用這個 sql 查詢:
Select count(*) from table
您可以使用:
$stmt=$mysqli->prepare("select `id` from `agahicustomer` where `city`=?");
$stmt->bind_param("s",$cityid);
$stmt->execute();
$stmt->store_result();
$stmt->bind_result($id);
return $stmt->affected_rows;
$stmt->close();
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