Styjun

Not exactly the issue you had but the same error for people searching.

This happened to me when I spent too much time on JavaScript.

Coming back to PHP I concatenated two strings with "+" instead of "." and got that error.

You can solve the problem without any new logic by just casting the thing into the number, which prevents the warning and is equivalent to the behavior in PHP 7.0 and below:

$sub_total += ((int)$item['quantity'] * (int)$product['price']);

(The answer from Daniel Schroeder is not equivalent because $sub_total would remain unset if non-numeric values are encountered. For example, if you print out $sub_total, you would get an empty string, which is probably wrong in an invoice. - by casting you make sure that $sub_total is an integer.)

In my case it was because of me used "+" as in other language but in PHP strings concatenation oprator is "." .

This was happening to me specifically on PHPMyAdmin. So to more specifically answer this, I did the following:

In File:

C:amppsphpMyAdminlibrariesDisplayResults.class.php

I changed this:

// Move to the next page or to the last one
$endpos = $_SESSION['tmpval']['pos']
 + $_SESSION['tmpval']['max_rows'];

To this:

$endpos = 0;
if (!empty($_SESSION['tmpval']['pos']) && is_numeric($_SESSION['tmpval']['pos'])) 
 $endpos += $_SESSION['tmpval']['pos'];

if (!empty($_SESSION['tmpval']['max_rows']) && is_numeric($_SESSION['tmpval']['max_rows'])) 
 $endpos += $_SESSION['tmpval']['max_rows'];

Hope that save's someone some trouble...

I had this issue with my pagination forward and backward link .... simply set (int ) in front of the variable $Page+1 and it worked...

<?php 
$Page = (isset($_GET['Page']) ? $_GET['Page'] : '');
if ((int)$Page+1<=$PostPagination) 
?>
<li> <a href="Index.php?Page=<?php echo $Page+1; ?>"> &raquo;</a></li>
<?php 
?>

Check if you're not incrementing with some variable that its value is an empty string like ''.

Example:

$total = '';
$integers = range(1, 5);

foreach($integers as $integer) 
 $total += $integer;

I encountered the issue in phpmyadmin with PHP 7.3. Thanks @coderama, I changed libraries/DisplayResults.class.php line 855 from

// Move to the next page or to the last one
$endpos = $_SESSION['tmpval']['pos']
 + $_SESSION['tmpval']['max_rows'];

into

// Move to the next page or to the last one
$endpos = (int)$_SESSION['tmpval']['pos']
 + (int)$_SESSION['tmpval']['max_rows'];

Fixed.

Try this.

$sub_total = 0;

and within your loop now you can use this

$sub_total += ($item['quantity'] * $product['price']);

It should solve your problem.

I just looked at this page as I had this issue. For me I had floating point numbers calculated from an array but even after designating the variables as floating points the error was still given, here's the simple fix and example code underneath which was causing the issue.

Example PHP

<?php
$subtotal = 0; //Warning fixed
$shippingtotal = 0; //Warning fixed

$price = array($row3['price']);
$shipping = array($row3['shipping']);
$values1 = array_sum($price);
$values2 = array_sum($shipping);
(float)$subtotal += $values1; // float is irrelevant $subtotal creates warning
(float)$shippingtotal += $values2; // float is irrelevant $shippingtotal creates warning
?>

$sn = 0;//increment the serial number, then add the sn to job
for($x = 0; $x<20; $x++)

$sn++;
$added_date = "10/10/10";
$job_title = "new job";
$salary = $sn*1000;
$cd = "27/10/2017";//the closing date
$ins = "some institution";//the institution for the vacancy 
$notes = "some notes here";//any notes about the jobs

$sn_div = "<div class='sn_div'>".$sn."</div>";
$ad_div = "<div class='ad_div'>".$added_date."</div>";
$job_div = "<div class='job_div'>".$job_title."</div>";
$salary_div = "<div class='salary_div'>".$salary."</div>";
$cd_div = "<div class='cd_div'>".$cd."</div>";//cd means closing date
$ins_div = "<div class='ins_div'>".$ins."</div>";//ins means institution
$notes_div = "<div class='notes_div'>".$notes."</div>";


/*erroneous line*/$job_no = "job"+$sn;//to create the job rows
$$job_no = "<div class='job_wrapper'>".$sn_div.$ad_div.$job_div.$salary_div.$cd_div.$ins_div.$notes_div."</div>";

echo $$job_no;//and then echo each job

that's the code I had which looped and created new html div elements. The code worked fine and the elements were formed, but i got the same warning in the error_log.

After reading the useful other answers, I figured that I was summing up a string and a number in the erroneous line. So I changed the code at that line to

/*erroneous line*/$job_no = "job"&&$sn;//this is the new variable that will create the job rows

Now the code works as earlier but with no warnings this time. Hope this example would be useful to someone.

Solve this error on WordPress

Warning: A non-numeric value encountered in C:XAMPPhtdocsaad-2wp-includesSimplePieParseDate.php on line 694

Simple solution here!

1. locate a file of wp-includesSimplePieParseDate.php
   


2. find a line no. 694


3. you show the code $second = round($match[6] + $match[7] / pow(10, strlen($match[7])));


4. and change this 3.) to this line $second = round((int)$match[6] + (int)$match[7] / pow(10, strlen($match[7])));
   

$sub_total_price = 0; 

foreach($booking_list as $key=>$value) 
 $sub_total_price += ($price * $quantity); 


echo $sub_total_price;

it's working 100% :)

That's happen usually when you con-cat strings with + sign. In PHP you can make concatenation using dot sign (.) So sometimes I accidentally put + sign between two strings in PHP, and it show me this error, since you can use + sign in numbers only.