How to use 2 foreach loops in a checkbox array - php

Question

I'm having some trouble when it comes to updating checkboxes.
I have two different tables with arrays and i am trying to compare data from both tables as they contain similar info.
The ref no is used as the the unique identifier since the information is CSV uploaded therefore i cant use the primary key.
As for the query i ran it on php admin and it showed the results were fine and i am aware the code is vulnerable to SQL injection but if i can find a solution to get i could work on it.
Structure of both tables:
I run the following code
<?php
include 'DBConfig.php';
if(isset($_POST['Submit']))
{
reconcile();
}
function reconcile(){
include 'DBConfig.php';
if(isset($_POST['reconciled']) && (isset($_POST['reconciled2']))){
foreach ($_POST['reconciled']as $recon1){
foreach($_POST['reconciled2'] as $recon2){
$query="select bankstatement.date,bankstatement.referenceno,bankstatement.debit,bankstatement.credit,bankstatement.status,cashbook.date,cashbook.referenceno,
cashbook.debit,cashbook.credit,cashbook.status
from bankstatement cross join cashbook
where '$recon1' = '$recon2' and cashbook.credit = bankstatement.debit and cashbook.debit = bankstatement.credit and cashbook.date = bankstatement.date and bankstatement.status = '0' and cashbook.status = '0'";
$result= mysqli_query($db,$query);
if($result)
{
$recon1 = implode(',' ,$_POST['reconciled']);
$recon2 = implode(',' ,$_POST['reconciled2']);
echo $change = "update bankstatement set status='1' where statementid=$recon1";
echo $change1 = "update cashbook set status='1' where cashbookid=$recon2";
$db->query($change);
$db->query($change1);
echo "<script>
alert('Success in Reconciling Process!!!');
window.location.href='viewreconcile.php';
</script>
";
}else{
echo "<script>
alert('Error in Reconciling Process!!!');
window.location.href='managereconcile.php';
</script>
";
}
}
}
}
}
?>
Results after code is run:
My issue now comes when trying to compare the data from both tables. The image of results show the first ref no's that were stored in the database after import instead of searching the similar ref no's. I dont get an error message instead i'm shown a success message though no update actually happens and no hanging occurs.
A sample of the CSV test data

Answer 1

Since you are trying to update the data of multiple rows with the same value you can't send it as where cashbookid=$recon2 but instead your code should look like this:
echo $change = "update bankstatement set status='1' where statementid IN($recon1)";
echo $change1 = "update cashbook set status='1' where cashbookid IN ($recon2)";
Since your values are being sent as a comma separated values, this will look for all those rows and update them.