The DomainException class

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

简介

Exception thrown if a value does not adhere to a defined valid data domain.

类摘要

DomainException extends LogicException {
/* 继承的属性 */
protected string $message ;
protected int $code ;
protected string $file ;
protected int $line ;
/* 继承的方法 */
public Exception::__construct ( string $message = "" , int $code = 0 , Throwable $previous = null )
final public Exception::getMessage ( ) : string
final public Exception::getPrevious ( ) : Throwable
final public Exception::getCode ( ) : mixed
final public Exception::getFile ( ) : string
final public Exception::getLine ( ) : int
final public Exception::getTrace ( ) : array
final public Exception::getTraceAsString ( ) : string
public Exception::__toString ( ) : string
final private Exception::__clone ( ) : void
}

User Contributed Notes

Cruiser 07-Dec-2017 10:02
Quote: "In data management and database analysis, a data domain refers to all the values which a data element may contain."

Source: https://en.wikipedia.org/wiki/Data_domain

This exception has confused me a bit, DataDomainException, or DataTypeException may have been more descriptive.
ja2016 at wir dot pl 31-Dec-2016 05:35
I think this kind of exception is perfect to throw when expected the  type of parameter, value etc. is good, but its value is out of domain. Look at RangeException:
>>Exception thrown to indicate range errors during program execution. Normally this means there was an arithmetic error other than under/overflow. This is the runtime version of DomainException.<<
So, this kind of exception is designed for logic error

When datatype is wrong, the better way is throwing InvalidArgumentException.

<?php
// Here, use InvalidArgumentException
function media($x) {
    switch (
$x) {
        case
image:
            return
'PNG';
        break;
        case
video:
            return
'MP4';
        break;
        default:
            throw new
InvalidArgumentException ("Invalid media type!");
    }
}
?>
This is completly diffirent situation than this:
<?php
// Here, use DomainException
$object = new Library ();
try {
   
$object->allocate($x);
} catch (
toFewMin $e) {
    throw new
DomainException ("Minimal value to allocate is too high").
}
?>
The simillar situation, but problem occurs during runtime:
<?php
class library {
    function
allocate($x) {
        if (
$x<1000)
            throw new
RangeException ("Value is too low!")
    }
}
?>
Summary: DomainException corresponds to RangeException and we should use them in simillar situations.  But first exception is designed to use when we are sure the problem is with our project, third-part elements etc. (simply: logical error), the second way is designed to use when we are sure the problem is with input data or environment (simply: runtime error).
chmielewski dot thomas at gmail dot com 29-Aug-2014 10:45
<?php

function divide($divident, $divisor) {
    if(!
is_numeric($divident) || !is_numeric($divisor)) {
        throw new
InvalidArgumentException("Function accepts only numeric values");
    }
    if(
$divisor == 0) {
        throw new
DomainException("Divisor must not be zero");
    }
    return
$divident / $divisor;
}
mateusz dot charytoniuk at gmail dot com 20-Oct-2011 12:45
<?php
function renderImage($imageResource, $imageType)
{
  switch (
$imageType) {
  case
'jpg':
  case
'jpeg':
   
header('Content-type: image/jpeg');
   
imagejpeg($imageResource);
    break;
  case
'png':
   
header('Content-type: image/png');
   
imagepng($imageResource);
    break;
  default:
    throw new
DomainException('Unknown image type: ' . $imageType);
    break;
  }
 
imagedestroy($imageResource);
}
?>
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