sql插入/从php中选择

Question

would it be possible to combine insert into and select from? what im trying to do is for the user to fill out an application the user can fill out as many applications as he or she wants each one is different. at the end of the application the user has to put an email address they need to put the correct email address that they used to log in. if they do not type the correct email address a message will show saying invalid email address he or she will not be able to continue until they get it right. my problem is that the message shows invalid email address but the info is still being uploaded

Insert page :

<?php
     require_once("configur.php");
     $mysqli = new mysqli(localhost);

     $query='INSERT INTO profile_table SET email="'.$_POST[email].'", name="'.$_POST[name].'", age="'.$_POST[age].'", status="display"';

     if ($mysqli->query($query) === TRUE) 
        {
          echo "Record updated successfully";
        }
     else
        {
          echo "Error updating record: " . $conn->error;
        }

     $mysqli->close();
 ?>

Main Page :

<?php 
    require_once("configur.php");
    $mysqli = new mysqli(localhost );
    # check connection
    if ($mysqli->connect_errno) 
        {
            echo "<p>MySQL error no {$mysqli->connect_errno} : {$mysqli->connect_error}</p>";
            exit();
        }

    $email=$_POST['email']; 

    $sql = "SELECT * from register_login WHERE  email='$email'";
    $result = $mysqli->query($sql);
    if (!$result->num_rows == 1) 
        {
            echo "<p>Invalid email Address</p>";
        }
    else 
        {
            $_SESSION['email'] = $email;
            echo "<p>Logged in successfully</p>";
            // do stuffs
        }
?>  

Answer 1

require_once("configur.php");

$mysqli = new mysqli(localhost );
# check connection

if ($mysqli->connect_errno) 
    {
        echo "<p>MySQL error no {$mysqli->connect_errno} : {$mysqli->connect_error}</p>";
        exit();
    }

$email=$_POST['email']; 

$sql = "SELECT * from register_login WHERE  email='$email'";
$result = $mysqli->query($sql);

if ($result->num_rows == 0 ) // email id not present
    {
        echo "<p>Invalid email Address</p>";
    }
else 
    {
        $_SESSION['email'] = $email;

        echo "<p>Logged in successfully</p>";

        $query='INSERT INTO profile_table SET email="'.$_POST[email].'", name="'.$_POST[name].'", age="'.$_POST[age].'", status="display"';

       if ($mysqli->query($query) === TRUE) 
       {
               echo "Record updated successfully";
       }
       else
       {
             echo "Error updating record: " . $conn->error;
       }

        $mysqli->close();

    }

Your code is confusing me, I am not getting how these two scripts are related I mean is Main Page code calling or including Insert page

Still I have one solution for you, you can combine two scripts in a single script like this.

You can use page redirection to call insert file but as you are using same $_POST array you should combine both scripts .