检查此配置文件是否存在于我的数据库中 - Check if this profile exists in my database

Check if this profile exists in my database

我正在尝试使用php进行分析。我不知道怎么检查。它唯一会检查的是表单号、名字和姓氏。

<?php
                        $FrmN = $_POST["formno"];
                        $FN = $_POST["firstname"];
                        $LN = $_POST["lastname"];
                        $con = mysql_connect("localhost","root","");
                        if (!$con)
                          {
                          die('Could not connect: ' . mysql_error());
                          }
                        mysql_select_db("vianney300", $con);
                        $sql = "INSERT INTO profile(FormNo, FirstName, LastName)
                        VALUES ('$FrmN', '$FN', '$LN')";
                        if (!mysql_query($sql,$con))
                          {
                          die('Error: ' . mysql_error());
                          }
                        echo "<br>1 record added!";
                        mysql_close($con);
                         ?>

试试下面的代码

<?php
    $FrmN = $_POST["formno"];
    $FrnN=$mysqli->real_escape_string($FrmN);
    $FN = $_POST["firstname"];
    $FN=$mysqli->real_escape_string($FN);
    $LN = $_POST["lastname"];
    $LN=$mysqli->real_escape_string($LN);
    $con = mysqli_connect("localhost","root","");
    if (!$con)
    {
    die('Could not connect: ' . mysqli_error());
    }
    mysqli_select_db("vianney300", $con);
    $sql = "INSERT INTO profile(FormNo, FirstName, LastName)
    VALUES ('{$FrmN}', '{$FN}', '{$LN}')"";
    if (!mysqli_query($sql,$con))
    {
     die('Error: ' . mysqli_error());
    }
    echo "<br>1 record added!";
    mysqli_close($con);
    ?>