PHP verification data error

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

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

1. 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']; } 

2. 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 3

您不需要报价。我想$badge_id $date_month $jns_saldo来自您的表单，带有$ _POST

if ($b_id == $badge_id AND $mon == $date_month AND $b_type == $jns_saldo)

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>";
                }
            }
        }
    }