PHP verification data error - php

Question

I have an problem with my PHP verification data.
This my code so far
$cek_saldo=mysql_query
("SELECT * FROM t_balance");
while ($data_cek = mysql_fetch_array($cek_saldo));
{
$b_id = $data_cek['badge_id'];
$mon = $data_cek['month'];
$bal = $data_cek['balance_type'];
}
if ($b_id == '$badge_id' AND $mon == '$date_month' AND $b_type == '$jns_saldo')
{
echo "<div class='emp_err warn'>Balance for this month has been added before.</div>";
}
else
{
if($_POST)
{
$query = "INSERT INTO t_balance(badge_id, balance_amount, month, balance_type, date_transaction)
VALUES ('$badge_id', '$saldo', '$bulan', '$jns_saldo', '$date_transaction')
";
$hasil = mysql_query($query);
if($hasil)
{
echo "<div class='emp_err success'>Balance transaction successfully added.</div>";
}
else
{
echo "<div class='emp'>Gagal menambahkan saldo.</div>";
}
}
}
The rule is :
Tabungan Wajib can be submit for 1 time per month. So if twice, it will give error : "Balance for this month has been added before."
Tabungan Tambahan can be submit more than 1 time per month. So if submit more than 1 time, it will saved.
Anyone have a suggestions ?

Answer 1

if ($b_id == "$badge_id" AND $mon == "$date_month" AND $b_type == "$jns_saldo")
{
echo "<div class='emp_err warn'>Balance for this month has been added before.</div>";
}
Your code failed due to the single quotes in the comparison using variables try to learn the difference between single and double quoted strings in php

Answer 2

You don't need to quote.I suppose $badge_id $date_month $jns_saldo come from your form with $_POST
if ($b_id == $badge_id AND $mon == $date_month AND $b_type == $jns_saldo)

Answer 3

This validation will no work
reason being you are selecting multiple rows from database and assigning only the last on e to $b_id .. $mon etc
and you are using single quotes for comparison
RESOLUTION
select data based on some id if you can
$cek_saldo=mysql_query("SELECT * FROM t_balance where id = 'someid'");
while ($data_cek = mysql_fetch_array($cek_saldo));
{
$b_id = $data_cek['badge_id'];
$mon = $data_cek['month'];
$bal = $data_cek['balance_type'];
}
set the error flag
$error = false;
while ($data_cek = mysql_fetch_array($cek_saldo));
{
$b_id = $data_cek['badge_id'];
$mon = $data_cek['month'];
$bal = $data_cek['balance_type'];
if($b_id == $badge_id AND $mon == $date_month AND $b_type == $jns_saldo)
{
$error = true;
break
}
}
if($error)
{
echo "<div class='emp_err warn'>Balance for this month has been added before.</div>";
}
Hope it helps

Answer 4

Use this.
$cek_saldo= mysql_query("SELECT * FROM t_balance");
while ($data_cek = mysql_fetch_array($cek_saldo));
{
$b_id = $data_cek['badge_id'];
$mon = $data_cek['month'];
$bal = $data_cek['balance_type'];
if ($b_id == "$badge_id" && $mon == "$date_month" && $b_type == "$jns_saldo")
{
echo "<div class='emp_err warn'>Balance for this month has been added before.</div>";
}
else
{
if($_POST)
{
$query = "INSERT INTO t_balance(badge_id, balance_amount, month, balance_type, date_transaction)
VALUES ('".$badge_id."', '".$saldo."', '".$bulan."', '".$jns_saldo."', '".$date_transaction."')";
$hasil = mysql_query($query);
if($hasil)
{
echo "<div class='emp_err success'>Balance transaction successfully added.</div>";
}
else
{
echo "<div class='emp'>Gagal menambahkan saldo.</div>";
}
}
}
}