PHP Select List - Insert multiple values in database - php

Question

I'm trying to insert multiple values in the database using select list. What I got so far:
HTML
<form enctype="multipart/form-data" action="" method="post">
<select name="cars[]" multiple="multiple" style="width:300px">
<?php
$getcars = mysql_query("SELECT cars_id, cars_name FROM car");
while ($row = mysql_fetch_assoc($getcars)) {
$car_id = $row['cars_id'];
$car_name = $row['cars_name'];
?>
<option value="<?php echo $car_id ?>"><?php echo $car_name ?></option>
<?php } ?>
</select><br />
<input type="submit" name="submit" value="Submit"/><br/>
</form>
PHP
$cars= $_POST['cars'];
echo $cars;
for($i = 0; $i < count($cars); $i++){
echo $cars[$i];
$carGroups = mysql_query("INSERT INTO car_groups VALUES('$company','$cars[$i]]')");
}
Unfortunately it doesn't work, I tried to print $cars to check the resulted value. It prints "Array", and when I tried to print $cars[$i] it prints nothing.
Does anyone know what the problem is?

Answer 1

There is an extra closing bracket that should be removed. You are not checking if your query was successful or not.
$carGroups = mysql_query("INSERT INTO car_groups VALUES('$company','$cars[$i]]')");
should be:
$carGroups = mysql_query("INSERT INTO car_groups VALUES('$company','$cars[$i]')") or die(mysql_error());
Since $cars is an array, you can print its content using print_r or var_dump:
print_r($cars);
var_dump($cars);
Useful reading:
How to get useful error messages in PHP?
mysql_* functions are deprecated

Answer 2

You have error $cars[$i]] and need change $cars[$i]
$carGroups = mysql_query("INSERT INTO car_groups VALUES('$company','$cars[$i]]')");
fix php for you with good sql
$cars= $_POST['cars'];
echo $cars;
foreach($cars as $i => $cars_name){
echo $cars_name;
$carGroups = mysql_query("INSERT INTO car_groups SET `fieldcompany`='{$company}', `fieldcars`='{$cars_name}'");
}