Checkboxes - print checked values in checkbox from database - php

Question

In insert form I am using check boxes to insert values in database. Now, I want to get checked values in edit form so I can check new values or uncheck checked values.
First I get values from database (I am using pdo, I will not post connection code to db- it works):
get oprmea from database
$sql_oprema = "SELECT Oprema FROM dbo_emarketing_stavke_oprema WHERE Partner='$id'";
$n = $conn->query($sql_oprema);
while ($r = $n -> fetch()) {
$oprema_sql = $r['Oprema'];
}
I get values when I dump variables, output is not NULL.
I am using function to store values in database. Now I want to use same function for editing if posssible.
function emarketing_oprema(){
$link = new mysqli("localhost", "root", "le30mu09", "websoft");
$link->set_charset("utf8");
$sql=mysqli_query($link, "SELECT * FROM `dbo_emarketing_oprema` order by OpremaId asc ");
while($record = mysqli_fetch_array($sql)) {
echo '<input type="checkbox" name="oprema[]" value="'.$record['OpremaId']. '">' . $record['OpremaNaziv'] . ' <br/><br/> </input>';
}
}
I was wondering is it possible to use this function to get checked values checked.

Answer 1

use checked attribute
<input type="checkbox" checked>
or like this
<input type="checkbox" checked="checked">
You php will look like this:
while($record = mysqli_fetch_array($sql)) {
data='<input type="checkbox" name="oprema[]" value="'.$record["OpremaId"];
if(isset($record['checked'])) {//field in the database
data+=' checked="checked';
}
data+='">'. $record["OpremaNaziv"].'</br>';
}