Question

I have 2 questions. One is if there is any error in this code.

The 2nd question I want to ask is how do you know which <li> item is selected. Right now, the code performs a search in mySQL for all rows that matches city, language and level and returns the results in a list item.

I want it so that when the user clicks on anyone of the list items, it will goes into another page displaying a more detail description by querying the selected list item.

I have a guess, which is for step 2, I also grab the ID (primary key) for each row and somehow keep that stored within the list but not echo.. Would I need to wrap <a> in <form action="XX.php" method="get">?

<?php
        //1. Define variables
        $find_language = $_GET['find_language'];
        $find_level = $_GET['find_level'];
        $find_city = $_GET['find_city'];

        //2. Perform database query
        $results = mysql_query("
            SELECT name, city, language, level, language_learn, learn_level FROM user 
            WHERE city='{$find_city}' && language='{$find_language}' && level='{$find_level}'", $connection) 
            or die("Database query failed: ". mysql_error());

        //3. Use returned data
        while ($row = mysql_fetch_array($results)){
            echo "<li>";
            echo "<a href=\"#result_detail\" data-transition=\"flow\">";
            echo "<h3>".$row["name"]."</h3>";
            echo "<p>Lives in ".$row["city"]."</p>";
            echo "<p>Knows ".$row["level"]." ".$row["language"]."</p>";
            echo "<p>Wants to learn ".$row["learn_level"]." ".$row["language_learn"]."</p>";
            echo "</a>";
            echo "</li>";}
    ?>

Answer 1

1. Your code looks alright from what I can see. Does it not work?

2. One way would be to get the ID through your SQL-query as well and then add the id to the href in your link. Then you can fetch it through the querystring on the other page, to display the proper post depending on which li-element the user clicked on:

   echo "<a href=\"details.php?id=". $row["id"] ."\" data-transition=\"flow\">";
   

Not sure how you mean “somehow keep that stored within the list but not echo” – it wouldn’t be possible to store anything in the list, if it is not echoed, as it then wouldn’t be sent to the client. You can of course store the id in a data-attribute on the li-element, which won’t be displayed to the user. It will however be visible through the source code! Don’t know why that should be a problem though?