If uncheck the check box delete row in my SQL table - php

Question

Actually I am very new to php.. I have a task that select records from database as checkboxes checked. When I uncheck a checkbox it should delete that particular record from my database..
My code is
<?php
if(isset($_POST['delete']))
{
$test=$_POST['test'];
$qun1=$_POST['question1'];
//DB connection
$CON=mysql_connect("localhost","root","");
mysql_select_db("Dbname");
if($qun1!=0 && $test!=0)
{
foreach($qun1 as $qunestion)
{
echo $question; //this is for testing
$query=mysql_query("delete from test_question where test_questions_id='$test' AND question_id IN ('$question') " ) or die(mysql_error());
}
if($query)
{
echo "success";
}
else
{
echo "No";
}
}
}
?>
my code is working properly but if i use NOT IN in the place of IN it is not working..why?..if unchecked the records it should be delete..i already retrieve records from database as checked fields..
My html markup:
<script>
function fun2(ts)
{
$.post("ajax2.php",{qs:ts},function(data)
{
document.getElementById('div1').innerHTML=data
})
}
</script>
<form action="somepage.php" method="post">
//dynamic selection test code
<select name="test" id="test" onChange="fun2(this.value);">
<option value="">Select Test</option> </select>
<div id="div1" > </div>
<input type="submit" name="delete" value="Delete" >
</from>
my ajax code:
<?php
$qs=$_REQUEST['qs'];
mysql_connect("localhost","root","");
mysql_select_db("advancedge");
$sql=mysql_query("select question_id from test_question where test_questions_id='$qs'");
if($sql)
{
while($rec=mysql_fetch_row($sql))
{
echo "<input type='checkbox' name='question1[]' value='$rec[0]' checked='checked' >";
}
}
?>

Answer 1

If I understand correctly, you want to delete as soon as the item is unchecked? To check if a checkbox is unchecked, you have to use javascript. PHP runs on the server, not the client side (you could use ajax, but I would recommend not to for this).
I would recommend, you delete whatever you want to on form submission, if you don't know how to do that,I can tell you if you post the html part up.
I would also recommend you learn PHP from a course on the internet, so you know some standards and get some good practices. (Youtube or Lynda.com)

Answer 2

It is an old post, but if someone end up here - this might solve the problem:
<?php
echo "<form action='' method='post'>";
echo "<input type='checkbox' id='chk_1' name='chk_1' value='First' />chk 1 </br>";
echo "<input type='checkbox' id='chk_2' name='chk_2' value='Second' />chk 2 </br>";
echo "<input type='submit' />";
echo "</form>";
$check = array();
// Set all checkboxes to 0 if unchecked
for($i = 1; $i<=2; $i++) {
$check["chk_$i"] = isset($_POST["chk_$i"]) ? 1 : 0;
}
// Output of the array
echo '<pre>';
var_export($check);
echo '</pre>';
The code will set all unchecked checkboxes to 0.
Then you have to take care of that using something like this:
<?php
if($_GET['chk_1'] == 0) {
$sql = "DELETE FROM mytable WHERE...";
}