PHP使用sqldb中的数据循环遍历变量

Question

I am making a html comparison table of total credit and debit for each month for the last one year.I am getting data from sql database table and using below code to segregate the data for each month.

Using below code, I am able to get the data and display on my html page. But I have to write separate similar code for each month. This is only a sample table, I have multiple similar code for different credit, debit category. so each time I have to duplicate it just like $credit0,$credit1....$credit11

I am new to php and this is how I come one with my limited knowledge. Is there any better way I can do it rather than writing multiple similar code for each month ?

<?php

//setting initial variable values are 0

$credit0 =$credit1 =$credit2 = 0;
$debit0  =$debit1  =$debit2 = 0;

//Getting 12 months details in Y-M format and assigning to different variable
$month0 = date("Y-M");
$month1 = date("Y-M", strtotime("-1 months"));
$month2 = date("Y-M", strtotime("-2 months"));
$month3 = date("Y-M", strtotime("-3 months"));
$month4 = date("Y-M", strtotime("-4 months"));
$month5 = date("Y-M", strtotime("-5 months"));
$month6 = date("Y-M", strtotime("-6 months"));
$month7 = date("Y-M", strtotime("-7 months"));
$month8 = date("Y-M", strtotime("-8 months"));
$month9 = date("Y-M", strtotime("-9 months"));
$month10 = date("Y-M", strtotime("-10 months"));
$month11 = date("Y-M", strtotime("-11 months"));

//Get the date details from sqldb and assgning to variable in Y-M format

$month_check= date('Y-M', strtotime($data['date'])); 

//each loop with the data from sqldb
foreach ($datas as $data){

    if ($month_check == $month0)  {

        if ($data['entry_type'] ==  'Credit') { $credit0 =  $credit0 + $data['amount']; }
        if ($data['entry_type'] ==  'Debit' ) { $debit0  =  $debit0  + $data['amount']; }   

    }

    if ($month_check == $month1)  {

        if ($data['entry_type'] ==  'Credit') { $credit1 =  $credit1 + $data['amount']; }
        if ($data['entry_type'] ==  'Debit' ) { $debit1  =  $debit1  + $data['amount']; }   

    }

    if ($month_check == $month2)  {

        if ($data['entry_type'] ==  'Credit') { $credit2 =  $credit2 + $data['amount']; }
        if ($data['entry_type'] ==  'Debit' ) { $debit2  =  $debit2  + $data['amount']; }   

    }
    .
    .
    .
    .
    .
    same format upto $month11
}

echo '<table"> 
        <thead>
            <tr>
               <th>Month</th>
               <th>Total Credit</th>
               <th>Total Debit</th>
            </tr> 
        </thead>
        <tbody>
            <tr>
                <td>'.$month0.'</td>
                <td>'.$credit0.'</td>
                <td>'.$debit0.'</td>
            </tr>
            <tr>
                <td>'.$month1.'</td>
                <td>'.$credit1.'</td>
                <td>'.$debit1.'</td>
            </tr>
            <tr>
                <td>'.$month2.'</td>
                <td>'.$credit2.'</td>
                <td>'.$debit2.'</td>
            </tr>
            .
            .
            .
            .
            upto $month11

        </tbody>

</table>';

//I have multiple similar tables for different categories

?>

UPDATE: Using loop, I tried below method,but its not working properly

<?php

$credit0 =$credit1 =$credit2 = 0;
$debit0  =$debit1  =$debit2 = 0;

$month0 = date("Y-M");
$month1 = date("Y-M", strtotime("-1 months"));
$month2 = date("Y-M", strtotime("-2 months"));
$month3 = date("Y-M", strtotime("-3 months"));
$month4 = date("Y-M", strtotime("-4 months"));
$month5 = date("Y-M", strtotime("-5 months"));
$month6 = date("Y-M", strtotime("-6 months"));
$month7 = date("Y-M", strtotime("-7 months"));
$month8 = date("Y-M", strtotime("-8 months"));
$month9 = date("Y-M", strtotime("-9 months"));
$month10 = date("Y-M", strtotime("-10 months"));
$month11 = date("Y-M", strtotime("-11 months"));

$months = array($month0,$month1,$month2,$month3,$month4,$month5,$month6,$month7,$month8,$month9,$month10,$month11);
$nums = array(0,1,2,3,4,5,6,7,8,9,10,11);

foreach  (array_combine($months, $nums) as $month => $num) {

$month_check= date('Y-M', strtotime($data['date'])); 

foreach ($datas as $data){

    if ($month_check == $month)  {

        if ($data['entry_type'] ==  'Credit') { $credit.$num =  $credit.$num + $data['amount']; }
        if ($data['entry_type'] ==  'Debit' ) { $debit.$num  =  $debit.$num  + $data['amount']; }   

    }

}

echo '<table"> 
        <thead>
            <tr>
               <th>Month</th>
               <th>Total Credit</th>
               <th>Total Debit</th>
            </tr> 
        </thead>
        <tbody>
            <tr>
                <td>'.$month.$num.'</td>
                <td>'.$credit.$num.'</td>
                <td>'.$debit.$num.'</td>
            </tr>
        </tbody>

</table>';

}


?>

Answer 1

Well first this:

$month0 = date("Y-M");
$month1 = date("Y-M", strtotime("-1 months"));
$month2 = date("Y-M", strtotime("-2 months"));
$month3 = date("Y-M", strtotime("-3 months"));
$month4 = date("Y-M", strtotime("-4 months"));
$month5 = date("Y-M", strtotime("-5 months"));
$month6 = date("Y-M", strtotime("-6 months"));
$month7 = date("Y-M", strtotime("-7 months"));
$month8 = date("Y-M", strtotime("-8 months"));
$month9 = date("Y-M", strtotime("-9 months"));
$month10 = date("Y-M", strtotime("-10 months"));
$month11 = date("Y-M", strtotime("-11 months"));

$months = array($month0,$month1,$month2,$month3,$month4,$month5,$month6,$month7,$month8,$month9,$month10,$month11);
$nums = array(0,1,2,3,4,5,6,7,8,9,10,11);

Becomes this:

$months = array();
$nums = array();

for($i=0; $i<12; $i++) {
     $month = date("Y-M", strtotime("-".$i." months"));
     array_push($months, $month);
     array_push($nums, $i);
}

And I don't really get what you're exactly trying to do with the rest of your code :|