How to insert checked values from checkbox in mysql by php - php

Question

There are many Subject in my database. I called them in a form in checkbox. When some checkbox checked, those value will go on my database in "select_subject" table in subject column. And when checked a radio button for course name, its value will go in "course" column. My mysql query and chackbox code was:
<?php
$result = mysql_query("SELECT * FROM vhsubject WHERE lid= 2");
while($row = mysql_fetch_array($result))
{
echo "<input type='checkbox' name='vhsubject[]' value=".$row['subject_name'].">" .$row['subject_name']."<br />";
}
?>
After checked and submit, my query was
<?php
if (isset($_POST['form'])) {
$query2 = "INSERT INTO select_subject (subject, course) VALUES ('$_POST[vhsubject]', '$_POST[course_radio]')";
$insert = mysql_query ($query2) or die(mysql_error());
if ($insert){
echo "Your registration is complete";
}
}
?>
But it doesn't work. Please help me;

Answer 1

Use Implode Function:
You can not store value in the form of an array in mysql, so first convert array into string by using implode function.
here is the example:
<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>
and now use implode function:
<?php
$q1=implode(',', $_POST['q1']);
?>