DivisionByZeroError PHP Origin: Application & API Last updated 13 Oct 2026

Fatal error: Uncaught DivisionByZeroError: Division by zero

Code divided by zero (or used modulo by zero) — PHP 8 throws instead of warning.

Exact message you may see Division by zeroModulo by zero
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Seen on: PHP

Meaning

PHP 8 converted division by zero from a warning into DivisionByZeroError. Averages, percentages and ratios over empty data are the usual source.

Common causes

  • Empty dataset (count is 0) used as a divisor
  • User input of 0
  • Modulo by zero (%)

⚡ Quick fix

  1. Guard the divisor: $total > 0 ? $sum / $total : 0
  2. Use fdiv() to get INF/NAN instead of an exception
  3. Validate numeric input

Detailed fix by platform

PHP

  1. $avg = $count ? $sum / $count : 0;

How to diagnose

  1. Expression — Which division?
  2. Data — Why is the divisor 0?

🔧 Still not fixed?

Many errors look alike. If the steps above didn’t solve it, one of these is probably what you’re facing:

Where this error sits

Origin: Application & API. Errors that are often confused with or caused by this one (click to open):

Allowed memory size exhausted — PHP Fatal error: Allowed memory size of X bytes exhausted (PHP)Allowed memory size e…ArgumentCountError — Fatal error: Uncaught ArgumentCountError: Too few arguments to function foo(), 1 passed and exactly 2 expected (PHP)ArgumentCountErrorCall to member function on null — Fatal error: Uncaught Error: Call to a member function x() on null (PHP)Call to member functi…Call to undefined function — PHP Fatal error: Uncaught Error: Call to undefined function (PHP)Call to undefined fun…Call to undefined function (WordPress) — WordPress: Fatal error: Uncaught Error: Call to undefined function wp_get_current_user() / add_action() / get_header() (WordPress)Call to undefined fun…Cannot redeclare — Fatal error: Cannot redeclare function foo() (previously declared in …) (PHP)Cannot redeclareCannot use object as array — Fatal error: Uncaught Error: Cannot use object of type stdClass as array (PHP)Cannot use object as …Division by zero — SQL Error: division by zero / Divide by zero error encountered (SQL)Division by zeroDivisionB…

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