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 Post subject: how to define variables as numeric
PostPosted: Thu Aug 04, 2022 11:12 pm 
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Joined: Tue Jun 16, 2015 1:03 am
Posts: 19
Quote:
Hi, I have some issues with my code. It's to refresh account payfile at end of month. Comments are noted
in code (//).
#1) how to define variables as numeric(I've tried several examples(forums and manuals)
#2) how to add several variables together so they are known as numeric(they are all decimal 8,2 in the database)
#3) Please, someone explain the "Undefined variable: mysql".

Code:
<?php
//Open a new connection to the MySQL server
= mysqli_connect("localhost", "root", "", "prerentdb");

// Check connection
if( === false){ die("ERROR: Could not connect. " . mysqli_connect_error()); }
//MySqli Select Query
= "select * FROM payfile";
echo "<center>";echo date('m/d/y');echo "<br />";
=0;
  ="prevbal";
  ="latechg";
   ="secdep";
   ="damage";
="courtcost";
      ="nsf";
   ="amtdue";
   ="amtpaid";
  ="paidsum";

=  +  +  +  +  + ; // Warning: A non-numeric value encountered x 5 line 21
=  + ;  Warning: // A non-numeric value encountered x 1 line 22

// if no payment or partial payment, add $10 to latechg field and amount not paid to prevbal field
if ( < )  // Notice: Undefined variable: amtpaid
   {  =  + 10;  =  - ;  }
// if payment = amtdue clear due
if ( == ) // Notice: Undefined variable: amtpaid
   {  = 0;  = 0; }
// if over-payment subtract over-payment
// from prevbal field
if ( >  )  // Notice: Undefined variable: amtpaid
{  =   - ;   = 0;  = 0;  }
= 0;  = 0;  = 0;  = 0;

// refresh every record - give every record the below values
= '0.00';
= '0.00';
= ' ';
= '0.00';
= ' ';

// Perform a query, check for error
if (! -> query("UPDATE payfile SET // Undefined variable: mysqli
Fatal error: Uncaught Error: Call to a member function query() on null
prevbal='',latechg='', hudpay='', amtpaid='',
datepaid='', comment='', paidsum=''
where unit = "));
mysqli_query() or die(mysql_error());
?>

Quote:
these are error messages:

Warning: A non-numeric value encountered in C:
mpp\htdocs\property
efreshpayments.php on line 21

Warning: A non-numeric value encountered in C:
mpp\htdocs\property
efreshpayments.php on line 21

Warning: A non-numeric value encountered in C:
mpp\htdocs\property
efreshpayments.php on line 21

Warning: A non-numeric value encountered in C:
mpp\htdocs\property
efreshpayments.php on line 21

Warning: A non-numeric value encountered in C:
mpp\htdocs\property
efreshpayments.php on line 21

Warning: A non-numeric value encountered in C:
mpp\htdocs\property
efreshpayments.php on line 21

Warning: A non-numeric value encountered in C:
mpp\htdocs\property
efreshpayments.php on line 22

Notice: Undefined variable: ampaid in C:
mpp\htdocs\property
efreshpayments.php on line 32

Notice: Undefined variable: mysqli in C:
mpp\htdocs\property
efreshpayments.php on line 44

Fatal error: Uncaught Error: Call to a member function query() on null on line 44


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 Post subject: Re: how to define variables as numeric
PostPosted: Fri Aug 05, 2022 7:38 am 
Offline
Site Admin

Joined: Wed Sep 12, 2007 2:18 pm
Posts: 3855
Hi.

1)
$x = 24535;
var_dump(is_numeric($x));

2) If You want to get a sum then

$num1 = "12.5";
$num2 = "15.5";
$result = floatval($num1) + floatval($num2);

If You want to store 2 values then You should create an array

$array = array();
$array[] = $num1;
$array[] = $num2;

3) There is some truncated code here.
Here is the sample of correct code:


$con = mysqli_connect("localhost","root","","prerentdb");

// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
exit();
}

$con->query("select * FROM payfile");

Regards,
Codelobster Team.


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