PHP Select List - Insert multiple values in database

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?

Community · Accepted Answer · 2017-05-23 11:53:03Z

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

edited May 23, 2017 at 11:53

CommunityBot

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answered Apr 2, 2013 at 17:08

Jocelyn

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2 Comments

shieldcy Over a year ago

i changed it but still not working. it prints "Array" and in the database it inserts 0's

shieldcy Over a year ago

that was really useful. My mistake was a variable name (a wrong letter basically). I checked it with print_r. Now it's fine! Thanks a lot for your help

khoa vo · Accepted Answer · 2013-04-02 17:31:21Z

0

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}'"); 
    }

edited Apr 2, 2013 at 17:31

answered Apr 2, 2013 at 17:13

khoa vo

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