Question

I’ve such a situation , want to retrieve row ids from mysql to input hidden elements. let’s take a look at script

php =>

<?php
$con = new mysqli("host","user","pswd","db");

if (isset($_POST['some'])){
    echo $_POST['some'];
}

echo "<form name='a' method='post' action='index.php'";

if (!$con->connect_error){
    if ($con->set_charset("utf8")){
        if ($r = $con->query("SELECT * FROM tb")){
            while ($row = $r->fetch_assoc()){
                echo "<input type='hidden' name='some' value='" . $row['id'] . "'><a href='javascript: void(0)' id='j'>" . $row['file_title'] . "</a><br>";
            }
            $r->free();
        }
    }
}

echo "</form>";
?>

and javascript

<script type="text/javascript">
document.getElementById("j").addEventListener("click",function(){
    document.a.submit();
});
</script>

from this script I’m expect that when I’ll click to $row['file_title'] it must echo clicked row id but it get id only from first element and this id belongs to last row in database. what is wrong here , how can I solve this problem ? thanks

Answer 1

Here while loop is overwriting hidden element and link Ids every time.

while ($row = $r->fetch_assoc()){
                echo "<input type='hidden' name='some' value='" . $row['id'] . "'><a href='javascript: void(0)' id='j'>" . $row['file_title'] . "</a><br>";
            }

See, Here every link has id ‘j’. Every input element has name ‘some’.
Better is to assign a class on this link and append $row[‘id’] in hidden element name in order to make elements unique like this :

while ($row = $r->fetch_assoc()){
                    echo "<input type='hidden' name='some_".$row['id']."' value='" . $row['id'] . "'><a href='javascript: void(0)' class="alink" id='j_".$row['id']."'>" . $row['file_title'] . "</a><br>";
                }

Javascript will be something like this :

<script type="text/javascript">

document.getElementsByClassName("alink").addEventListener("click",function(){
    document.a.submit();
});

</script>

where ‘alink’ is the class assigned to the link.

Hope, it’ll help you..