Get values checked - php

Question

I am having trouble in getting checked values checked in form. I was trying to use the same function as I have used to insert values to print all values in edit form, and which are in other table inserted to mark them checked.
Function to insert values in database table in insert form and it works.
function emarketing_usluge(){
$link = new mysqli("localhost", "xxx", "xxx", "xxx");
$link->set_charset("utf8");
$sql=mysqli_query($link, "SELECT * FROM `jos_ib_emarketing_oprema` order by OpremaId asc ");
while($record = mysqli_fetch_array($sql)) {
echo '<input type="checkbox" name="usluge[]" value="'.$record['OpremaId ']. '">' . $record['OpremaNaziv'] . ' <br/><br/> </input>';
}
}
In this function I get list of all services and place them in checkboxes.
Now I want to edit form, and display all values that are checked by using same function.
First I make query to get values, I am using here pdo but for funcion files I have used mysqli.
Form for editing!
$sql_oprema = "SELECT a.Partner, a.OpremaId, a.Oprema, b.OpremaNaziv
FROM jos_ib_emarketing_stavke_oprema a
join jos_ib_emarketing_oprema b
on OpremaId = b.Oprema
WHERE a.Partner= $id";
$oprema = $conn->query($sql_oprema);
$row = $oprema ->fetch();
<div class="col-xs-6">
<input type="checkbox" id="oprema" onclick="Exposeoprema()">Oprema<br>
<div id="Scrolloprema" style="height:150;width:200px;overflow:auto;border:1px solid blue;display:none">
<?php
while($row = $oprema ->fetch()) {
$data='<input type="checkbox" name="oprema[]" value="'.$row["Oprema"].'"';
if(isset($row['Oprema'])) {//field in the database
$data.=' checked="checked';
}
$data.='">'. $row["OpremaNaziv"] .'</br>';
}
emarketing_oprema($data);
?>
</div>
</div>
I am trying print all service values by using function, but the ones that are checked they need to have check mark. I am getting problem and could not figure it out how to solve it.

Answer 1

Looking back to your SQL query, I don't see an extraction of checked field, you are not selecting it. So there is never going to be a $row['checked'] element of your query.
You should add:
$sql_oprema = "SELECT a.checked, a.Partner, a.OpremaId, a.Oprema, b.OpremaNaziv
FROM jos_ib_emarketing_stavke_oprema a
join jos_ib_emarketing_oprema b
on OpremaId = b.Oprema
WHERE a.Partner= $id";