store checkbox value to mysql database

I have problem in storing checkbox values in mysql db (only the last value is stored in the database). How can I fix this code to store all checked values?

<label class="q" for="q1">Which, if any, of these activities did you do on the Internet in the last 30 days? 
<input name="q1[]" type="checkbox" value="a1">Used e-mail<br>
<input name="q1[]" type="checkbox" value="a2">Used instant messenger & chat room<br>
<input name="q1[]" type="checkbox" value="a3">Made a purchase for personal use<br>
<input name="q1[]" type="checkbox" value="a4">Downloaded/Played a video game<br>
<input name="q1[]" type="checkbox" value="a5">Obtained news/information/current events<br>
<input name="q1[]" type="checkbox" value="a6">Looked for employment (Used classified listings)<br>
<input name="q1[]" type="checkbox" value="a7">Looked for recipes<br>
<input name="q1[]" type="checkbox" value="a8">Downloaded a movie<br>



$sql="INSERT INTO $tbl_name(q1)VALUES('$q1')";


You can use implode

$q1=implode(',', $_POST['q1']);

        <form action="" method="post">
            <table width="50%">
        <td><input type="checkbox"name="boxes[]"value="8am">1</input></td>
        <td><input type="checkbox"name="boxes[]"value="10am">3</input></td>
            <input type="submit" name="submit">
            $t1=implode(',', $_POST['boxes']);
            $s = "insert into new(time) values('$t1')"; 
                    echo "insert success";
                    echo "error in inserting";



please try this.

I experienced the same issue for check boxes implode() works like a charm. For radio buttons you'll need to use an associative array for implode() to work.

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