How to insert value of multiple select checkbox into database - php

Question

I have a multiple select checkbox but i couldnt find a way on how to insert into database which each checkbox will create new rows in database.
this is how my dropdown looks like
<select id="plant" name="plant[]" class="form-control" multiple="multiple">
<?php
$query_plant = "SELECT * FROM plant WHERE plant_enable=1 ORDER BY plant_name";
$rs_plant = DB_Query($query_plant);
while ($row_plant = DB_FetchRow($rs_plant)) {
$plant.='<option name='.$row_plant["plant_shortname"].' value='.$row_plant["plant_id"].'>' .$row_plant["plant_name"].' ['.$row_plant["plant_id"].']</option>';
}
mysql_free_result($rs_plant);
echo $plant;
?>
</select>

Answer 1

You can get the selected checkbox value by using the name of checkbox on form submit like:
$plants = $_REQUEST['plant'];
$plants is an array here, so use foreach() to iterate over it and for each value make a insert query or combine all values in a single query and fire that query on database.

Answer 2

if(isset($_POST['company'])) {
$checkbox1 = $_POST['plant'];
$chk="";
$stf_sql = "SELECT * FROM test_plant WHERE staff_id = '".$STAFF_ID."'";
$stf_res = DB_Query($stf_sql);
if(DB_RowsReturned($stf_res) > 0) {
$del_sql = "DELETE FROM test_plant WHERE staff_id = '".$STAFF_ID."'";
$del_res = DB_Query($del_sql);
}
foreach($checkbox1 as $chk1)
{
$in_ch="insert into test_plant(staff_id, plant_name, submit_dt) values ('$STAFF_ID','$chk1', Now())";
$in_res = DB_Query($in_ch);
$abc = mysql_query("SELECT * FROM test_plant");
while($abc_row = mysql_fetch_assoc($abc)) {
foreach($abc_row as $key => $value) {
echo $key;
}
}
}
} else {
echo "OK";
}