Question

我想验证来自DB的详细信息，这个调用是否可以在DB中使用。此代码正常工作，但仅限第1行，例如，ID为123 CLI - 567，持续时间为00:01:00已经可用，第二个呼叫持续时间为00:01:01也可用。但是这段代码不是检查第二行并带我去别的声明。

<?php
$con=mysqli_connect("localhost","root","","test");
$check="SELECT * FROM eval WHERE empid = '$_POST[empid]' AND cli = '$_POST[cli]'  AND callduration = '$_POST[callduration]' ";
$rs = mysqli_query($con,$check);
$data = mysqli_fetch_array($rs, MYSQLI_NUM);

if($data > 0 ) {
   echo "Record already exist...<br/>";
}
else
{
  echo "<a href='NewUser.php'> New Sign Up </a>
}
?>

Answer 1

尝试使用mysqli_num_rows，因为mysqli_fetch_array可以获得每条记录，并且可以循环播放它们。现在使用mysqli_num_rows，您可以计算所有记录，并且可以处理记录是否存在。

<?php
    $con = mysqli_connect("localhost","root","","test");
    $query = "SELECT * 
              FROM eval
              WHERE empid = '".$_POST['empid']."' 
                  AND cli = '".$_POST['cli']."'
                  AND callduration = '".$_POST['callduration']."'";
    $result = mysqli_query($con, $query);
    $data = mysqli_num_rows($result);

    if($data > 0 ) {
        echo "Record already exist...<br/>";
    } else {
        echo "<a href='NewUser.php'> New Sign Up </a>
    }
?>

按要求提供我的测试查询

$query = "SELECT * 
          FROM user 
          WHERE user_name = '".$_POST['user_name']."'
              AND user_mail = '".$_POST['user_mail']."'";

验证三个字段以检查重复

1 个答案: