php - Multiple Update Query -

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i have written 2 different codes in php , want merge 1 code because both codes same, update query different. can 1 me? , second problem if condition does'nt work why that?

code1:

 <?php  include("database/connection.php");  $sql = "select *  registration,billing_month"; $result = $link->query($sql);  while ($row = $result->fetch_assoc()) {     $regid = $row['reg_id'];     $duedate = $row['bill_due_date'];     $currentbill = $row['current_bill'];     $arrears = $row['arrears'];     $updatearrears = $arrears + $currentbill;      if (date('y-m-d') > $duedate) {         $sql_update = "update  registration set arrears= $updatearrears reg_id = $regid";          if (mysqli_query($link, $sql_update)) {             //   echo "updated";         } else {             // echo "could not updated";         }     } } ?>

code2:

   <?php      include("database/connection.php");      $sql = "select *  registration,billing_month";     $result = $link->query($sql);      while ($row = $result->fetch_assoc()) {         $regid = $row['reg_id'];         $billingid = $row['bill_id'];         $duedate = $row['bill_due_date'];         $currentbill = $row['current_bill'];         $updatebill = 0;          if (date('y-m-d') > $duedate) {             $sql_update = "update  registration set current_bill= $updatebill reg_id = $regid";              if (mysqli_query($link, $sql_update)) {                 //   echo "updated";             } else {                 // echo "could not updated";             }         }     }     ?>

use strtotime() compare data. add quotes in value.

before update database use

 $updatebill=mysqli_real_escape_string($link,$updatebill);  if (strtotime(date('y-m-d')) > strtotime($duedate))  {   $sql_update = "update  `registration` set `current_bill`= '".$updatebill ."' `reg_id` = $regid";  }

to check error in page use

ini_set('display_errors',1); ini_set('display_startup_errors',1); error_reporting(-1);

and prevent query sql injection


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