Have never seen += operand

[Butterbean]

I have looked everywhere trying to find out what += means. I am getting an error ,

 

 

Fatal error: Unsupported operand types in C:\xampp1\htdocs\Utrack\invoice.php on line 73".  I just realized after upgrading from mssql 2008r2 to mssql 2014, this error started.  Can someone please help me a bit?  

 

 

Thanks.  

[CroNiX]

$x = 5;

$x += 5; //short for $x = $x + 5

echo $x;  //10

 

http://php.net/manual/en/language.operators.assignment.php

Edited January 9, 2015 by CroNiX

[Butterbean]

if ($query === false){  exit("<pre>".print_r(sqlsrv_errors(), true));}while ($row = sqlsrv_fetch_array($query)){  	$sumUsageKWH += $row['totalUsage'];}sqlsrv_free_stmt($query);?> 

This is how its being used.  I will read your link.  Thank you.  

Edited January 9, 2015 by Butterbean

[Butterbean]

Got it!  Thank you.  

[CroNiX]

No, it's saying 

$sumUsageKWH = $sumUsageKWH + $row['totalUsage']

so it's just adding $row['totalUsage'] to $sumUsageKWH

[Butterbean]

I see that now.  Thank you for your help.  I wonder why its returning an error in php 5 whereas it did not in earlier versions.  Does Php55 accept this operand?

Edited January 9, 2015 by Butterbean

[Barand]

What do

 

var_dump($sumUsageKWH)

and

var_dump($row['totalUsage'])

 

show on that line