Php Warning Division By Zero Error
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Division By Zero In Php Warning
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How To Solve Division By Zero In Php
Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to suppress php suppress division by zero warning the “Division by zero” error and set the result to null for the whole application? up vote 7 down vote favorite How to suppress the "Division by zero" error and set the result to null for the whole application? By saying "for the whole application", I mean it is not for a single expression. Instead, whenever a "Division by zero" error occurs, the result warning division by zero wordpress is set to null automatically and no error will be thrown. php share|improve this question edited Sep 16 '10 at 23:58 asked Sep 16 '10 at 23:47 Ethan 10.1k82950 If you're looking for c++ operator overloading possibility, so the php doesn't support it, see the discussion here: stackoverflow.com/questions/787692/operator-overloading-in-php –Igor Sep 17 '10 at 0:27 Suppressing errors is generally considered a bad practice. You can use try and catch, but not @. You should write your code in such way that incorrect values are sanitized and no errors or warnings are thrown by standard execution of your code. –Mike Sep 26 '13 at 14:53 in SQL Server, there is a little trick NULLIF() bennadel.com/blog/… –Jaider Apr 29 '14 at 20:24 add a comment| 4 Answers 4 active oldest votes up vote 16 down vote accepted This should do the trick. $a = @(1/0); if(false === $a) { $a = null; } var_dump($a); outputs NULL See the refs here error controls. EDIT function division($a, $b) { $c = @(a/b); if($b === 0) { $c = null; } return $c; } In any place substitute 1/0 by the functi
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Php Ignore Division By Zero
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Warning Division By Zero In Home
them; it only takes a minute: Sign up PHP, How to catch a division by zero? up vote 18 down vote favorite 2 I have a large mathematical expression that has to be created dynamically. For example, once I http://stackoverflow.com/questions/3731710/how-to-suppress-the-division-by-zero-error-and-set-the-result-to-null-for-the have parsed "something" the result will be a string like: "$foo+$bar/$baz";. So, for calculating the result of that expression I'm using the eval function... something like this: eval("\$result = $expresion;"); echo "The result is: $result"; The problem here is that sometimes I get errors that says there was a division by zero, and I don't know how to catch that Exception. I have tried things like: eval("try{\$result = $expresion;}catch(Exception \$e){\$result = 0;}"); echo "The result is: $result"; Or: http://stackoverflow.com/questions/3071067/php-how-to-catch-a-division-by-zero try{ eval("\$result = $expresion;"); } catch(Exception $e){ $result = 0; } echo "The result is: $result"; But it does not work. So, how can I avoid that my application crashes when there is a division by zero? Edit: First, I want to clarify something: the expression is built dynamically, so I can't just eval if the denominator is zero. So... with regards to the Mark Baker's comment, let me give you an example. My parser could build something like this: "$foo + $bar * ( $baz / ( $foz - $bak ) )" The parser build the string step by step without worrying about the value of the vars... so in this case if $foz == $bak there's in fact a division by zero: $baz / ( 0 ). On the other hand as Pete suggested, I tried: But it does not print anything. php exception divide-by-zero share|improve this question edited Mar 13 '14 at 19:01 Eric Leschinski 47.1k23221191 asked Jun 18 '10 at 15:41 Cristian 138k44300237 1 Can you check if $expression is dividing by zero beforehand? –Anthony Forloney Jun 18 '10 at 15:44 @Anthony Forloney: Good question, my answer assumed you could, but if Cristian is really using eval for this, then the answer is proba
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 http://thisinterestsme.com/php-warning-division-zero/ not exist. i.e. It has not been set.Example code that will https://forums.phpfreaks.com/topic/249894-php-division-by-zero/ reproduce the error:PHP $var = 0; echo 12 / $var;12$var = 0;echo 12 / $var;If you run the code 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 division by can be avoided 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 division by zero that the variable (in this 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 /
Detected You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality. PHP Division By Zero? Started by ShoeLace1291, Oct 27 2011 09:18 AM Please log in to reply 4 replies to this topic #1 ShoeLace1291 ShoeLace1291 Advanced Member Members 401 posts Posted 27 October 2011 - 09:18 AM So, this is something that I've been wondering for a while now... say you have two variables that you need to divide to find a certain percentage and one happens to be zero... why does PHP feel the need to return a warning saying there was a division by zero? why not just return the number zero since anything that's divided by zero always results in zero anyway? Just a random thought. Back to top #2 jotorres1 jotorres1 Advanced Member Members 85 posts Posted 27 October 2011 - 10:20 AM That not true, division by zero is NOT equal to zero. Just basic math. Example, you have 3 / 0 != 0 because 0 x 0 != 3. You get the point. In which case, in PHP you can use the Error Suppression Operator, something like this. $a = @(25/0); Using the '@' Operator, the error is suppressed. The slowest component sits behind the keyboard. PHP Beginners Jotorres Web Development Back to top #3 Kieran Menor Kieran Menor Advanced Member Members 179 posts LocationDenmark Posted 27 October 2011 - 10:24 AM Or even better, you should do a check to see if your divisor is zero so you can handle the situation correctly. Back to top #4 jotorres1 jotorres1 Advanced Member Members 85 posts Posted 27 October 2011 - 10:27 AM Yea, these division by zeros are common questions asked in any programming job interviews. Division by zero should always be handled no matter the language. The slowest component sits behind the keyboard. PHP Beginners Jotorres Web Development Back to top #5 The Little Guy The Little Guy Advanced Member Members 6,676 posts Posted 27 October 2011 - 03:20 PM $number = 100; if($me == 0) $result = 0; else $result = $number / $me; echo $result; phpLive - A powerful library that implements many common tasks to make php programming faster. Supports extensions and plugins. Current version: 1.0.0-Alpha Twitter: http://twitter.com/phpsnips http://dreamhost.com (promo code: 8RN4) $30 off 1 year of hosting $40 off 2 years of hosting Back to top Back to PHP Coding Help · Next Unread Topic → 1 user(s) are reading this topic 0 members, 1 guests, 0 anonymous users Reply to quoted postsClear PHP Freaks → PHP Coding → PHP Coding Help Priva