Question

Hi i am new to using php and im still trying to find my way around it. I have a form where i want to update information in the database. I have a textbox where the user enters the id nd I want to compare the id the user puts in to the Id’s in the database so as to update the information of that user. I have been searching around but cant find what im looking for.

Answer 1

suppose that you have the following formula in the file formular.html which have to send information to the file receive.php

<form action="receive.php" method="post">
   Name : <input type="text" name="user_id" />
   <input type="submit"/>
</form>

According to the fact that the sending method of the formular is here post. here’s how the receive.php could look like

<?php
    // receiving information
    $id = $_POST['user_id'];

    // connecting to database to retrive id to be compare
    $link = mysql_connect("localhost","root","");
    mysql_select_db("sampleDatabase",$link);

    // writing your query
    $query = "SELECT id FROM sampleTable WHERE 1;";

    // executing your query
    $result = mysql_query($query, $link);*

    // fetching the result
    $row = mysql_fetch_array($result);

    // testing the similarity between information from the database and the one from the formular
    if($id == $row['id']) // make a decision
    else // make another decision

    // for dealing whit many line on the result use the following code
    while($row = mysql_fetch_array($result)){
       // make a stuff with $row
    } 

    // may be you could want to do a redirection if so the use the following header function

    header("Location: formular.html");
?>