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DivisionByZeroError

(PHP 7)

Introduction

DivisionByZeroError is thrown when an attempt is made to divide a number by zero.

Class synopsis

DivisionByZeroError extends ArithmeticError {

/* Inherited properties */

protected string $message ;

protected int $code ;

protected string $file ;

protected int $line ;

/* Inherited methods */

final public Error::getMessage ( void ) : string

final public Error::getPrevious ( void ) : Throwable

final public Error::getCode ( void ) : mixed

final public Error::getFile ( void ) : string

final public Error::getLine ( void ) : int

final public Error::getTrace ( void ) : array

final public Error::getTraceAsString ( void ) : string

public Error::__toString ( void ) : string

final private Error::__clone ( void ) : void

}

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User Contributed Notes 3 notes

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salsi at icosaedro dot it ¶

3 years ago


Note that on division by zero 1/0 and module by zero 1%0 an E_WARNING is triggered first (probably for backward compatibility with PHP5), then the DivisionByZeroError exception is thrown next.

The result is, for example, that if you set the maximum level of error detection with error_level(-1) and you also map errors to exception, say ErrorException, then on division by zero only this latter exception is thrown reporting "Division by zero". The result is that a code like this:

<?php
// Set a safe environment:
error_reporting(-1);

// Maps errors to ErrorException.
function my_error_handler($errno, $message)
{ throw new ErrorException($message); }

try {
    echo 1/0;
}
catch(ErrorException $e){
    echo "got $e";
}
?>

allows to detect such error in the same way under PHP5 and PHP7, although the DivisionByZeroError exception is masked off by ErrorException.

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Alex ¶

4 months ago


This error is thrown only for integer division - this is when using "intdiv" function or "%" operator. In all cases you will get an E_WARNING when dividing by zero.

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-17

Manjunath ¶

3 years ago


<?php
class MathOperation extends Error
{
    protected $n = 10;

    // Try to get the Division by Zero error object and display as Exception
    public function doArithmeticOperation(): string
    {
        try {
            $value = $this->n % 0;
        } catch (DivisionByZeroError $e) {
            return $e->getMessage();
        }
    }
}

$mathOperationObj = new MathOperation();
echo $mathOperationObj->doArithmeticOperation();

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