Division By Zero Php Error
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Warning Division By Zero In Php
the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a php division by zero exception minute: Sign up Division by zero error up vote 3 down vote favorite 2 I have this code throwing up the error: I have tried adding this line: if ($res === 0) { echo "not eligible"; } but it still gives the error. any ideas? php division divide-by-zero share|improve this question edited Oct 18 '13 at 18:38 Kamiccolo 2,93111732 asked Oct 18 '13 at 18:29 Seth-77 871213 can you indent your code! –Jason OOO Oct 18
Sql Division By Zero
'13 at 18:30 sorry, its the way its written in the script! –Seth-77 Oct 18 '13 at 18:37 add a comment| 5 Answers 5 active oldest votes up vote 7 down vote accepted You'd want to check $val2 before the division occurs: share|improve this answer answered Oct 18 '13 at 18:34 Chris Rasco 2,10011018 add a comment| up vote 1 down vote if($val2!=0){ //Do it }else{ //Don't } share|improve this answer answered Oct 18 '13 at 18:30 undone 6,20232756 add a comment| up vote 1 down vote You have the following in your code: $val2 = count($allcontent); If the $allcontent array is empty, then the value of $val2 will be 0, and you will essentially be doing: $res = ( $val1 / 0) * 100; As expected, this will cause PHP to return the 'Division by zero' error. To make sure this doesn't happen, simply use an if statement: if ($val2 != 0) { $res = ( $val1 / $val2) * 100; // 1 digit after the decimal point $res = round($res, 1); // 66.7 echo "Success: "; echo $res; echo "%"; } This can be rewritten using sprintf(): if ($val2 > 0) { $res =
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Warning: Division By Zero Wordpress
Join them; it only takes a minute: Sign up PHP Warning: Division by zero up vote 2 down vote favorite I'm learning php and built an experimental form-based calculator (also using html & POST method) that returns values to http://stackoverflow.com/questions/19456652/division-by-zero-error a table. The calculator is functional when I enter my values and click submit, but I keep getting two "Division by zero" errors on the last line when I first run the code. I can't seem seem to find a logical solution or explanations when searching here or via Google. Any explanation you can provide to a newb will be appreciated. http://stackoverflow.com/questions/18408640/php-warning-division-by-zero $shipMat = $_POST['num4']; $diffPrice = $itemSale - $itemCost; $actual = ($diffPrice - $shipMat) * $itemQty; $diffPricePercent = (($actual * 100) / $itemCost) / $itemQty ; ?> php divide-by-zero share|improve this question asked Aug 23 '13 at 17:34 Chip 1451210 3 could you post the relevant code? –Emilio Gort Aug 23 '13 at 17:34 3 Why are you doing + null? And do all variables have a value? –putvande Aug 23 '13 at 17:35 2 @Chip - can you also add in a var_dump($_POST) so we can see what the incoming variables are? –andrewsi Aug 23 '13 at 17:38 1 "errors on the last line when I first run the code". This code won't work unless something is posted to it. You need to check if(isset($_POST['num1'])). –Rocket Hazmat Aug 23 '13 at 17:38 1 @Sumurai8: var_dump doesn't return anything, it echos for you. You don't need the echo there. –Rocket Hazmat Aug 23 '13 at 17:39 | show 8 more comments 7 Answers 7 active oldest votes up vote 2 down vote accepted You need to wrap your form processing code in a conditional so it doesn't run when you first open the page. Something like so: if($_POST['num1'] > 0 && $_POST['num2'] > 0 && $_POST['num3'] > 0 && $_POST['num4'] > 0){ $itemQty = $_POST['num1']; $itemCost = $_POST['num2']; $itemSale = $_POST['num3']; $shipMat = $_POST['num4']; $diffPrice = $itemSale - $it
dividing with has been set to zero (this number is called the divisor).The variable you're dividing with has been set to null.The variable does not exist. http://thisinterestsme.com/php-warning-division-zero/ i.e. It has not been set.Example code that will reproduce the error:PHP $var = 0; echo 12 / $var;12$var = 0;echo 12 / $var;If you run the code https://forum.virtuemart.net/index.php?topic=104723.0 above, you'll be faced with the following error: Warning: Division by zero. This is because our variable $var has been set to 0.Fortunately, this common warning can be avoided by zero by carrying out some very basic checking. To avoid this type of error, you can wrap your division arithmetic inside an IF statement, like so:PHP $var = 0; if($var > 0){ echo 12 / $var; }1234$var = 0;if($var > 0){echo 12 / $var;}The code above is pretty simple. Basically, we make sure that the variable (in this division by zero case, our divisor) is greater than 0 before we attempt our division calculation.PS: It is important to note that this will not prevent your script from executing. In other languages, division by zero can lead to an exception that essentially kills the program. Comments comments3SHARESFacebookTwitterRelated posts:Slow MySQLi connection Creating a "what's hot" algorithm with PHP and MySQL PHP: Error handling with cURL Avoiding undefined index / offset errors in PHP This entry was posted in Code, PHP Tutorials by ThisInterestsMe. Post navigation ← Parking The Bus - Mourinho FIFA 15 Tactics Searching between dates in MySQL. → Search Search for: Recent Posts How to set the cruise control on a Vauxhall / Opel Insignia. PHP: Cache SQL results on file system. Convert EURO to GBP (Sterling) using PHP Move a file with PHP. PHP: Get last day of month. MySQL: SELECT all records from today using PHP. CategoriesAbandoned WebsitesCall of DutyCodeData DownloadsDayZFantasy FootballFootballFunnyGamingIrelandJavaScriptMySQLNostalgiaPeople of the InternetPHP TutorialsProgramming HumorRantSEO / WebmasterTips & TricksTwitter TrendsUncategorizedVideosWexfordWexford News Toolbox Premier League Fixtures Difficulty
a member VirtueMart Forum » VirtueMart 2 + 3 » Virtuemart Development and bug reports » [SOLVED] WARNING: Division by zero error message « previous next » Print Pages: [1] Go Down Author Topic: [SOLVED] WARNING: Division by zero error message (Read 11503 times) z-analysts Jr. Member Posts: 162 [SOLVED] WARNING: Division by zero error message « on: July 02, 2012, 16:56:29 pm » Warning: Division by zero in /home/XXXXXXXX/public_html/XXXXXXXX/administrator/components/com_virtuemart/models/product.php on line 516I just upgraded to 2.0.8a and got the above PHP warning message when I display products in category view. Logged strophe Beginner Posts: 3 Re: WARNING: Division by zero error message « Reply #1 on: July 02, 2012, 17:18:45 pm » Hi everyone.Same error, same place, same update... Logged andrew.glover Beginner Posts: 11 Re: WARNING: Division by zero error message « Reply #2 on: July 02, 2012, 17:26:09 pm » Hi all, As with the others above. Same bug, same place, same upgrade. Logged sakabra Beginner Posts: 3 Re: WARNING: Division by zero error message « Reply #3 on: July 02, 2012, 17:27:56 pm » Me too! Logged JerryQ Beginner Posts: 7 Re: WARNING: Division by zero error message « Reply #4 on: July 02, 2012, 17:32:08 pm » try this:replace line 516 with this: if($category->products_per_row>0){$rest = $suglimit%$category->products_per_row; }else{$rest =1;} Logged andrew.glover Beginner Posts: 11 Re: WARNING: Division by zero error message « Reply #5 on: July 02, 2012, 17:33:28 pm » Hi all, Although I haven't explored all the repercussions to doing so. I solved the problem by simply commenting out line 516. It seams to work without affecting any other part of the shop. Logged z-analysts Jr. Member Posts: 162 Re: WARNING: Division by zero error message « Reply #6 on: July 02, 2012, 17:41:32 pm » This is a better solution: http://forum.virtuemart.net/index.php?topic=104707.0. Logged Milbo Virtuemart Projectleader Administrator Super Hero Posts: 8120 VM3 ready to take off VirtueMart Version: VirtueMart 3 on joomla 3 Re: [SOLVED] WARNING: Division by zero error message « Reply #7 on: July 02, 2012, 21:55:00 pm » The best solution is imho the one above and thisCode: [Select]if(empty($limit)){