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The InvalidArgumentException class

(PHP 5 >= 5.1.0)

Вступ

Exception thrown if an argument is not of the expected type.

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InvalidArgumentException extends LogicException {

/* Успадковані властивості */

protected string $message ;

protected int $code ;

protected string $file ;

protected int $line ;

/* Успадковані методи */

final public string Exception::getMessage ( void )

final public Exception Exception::getPrevious ( void )

final public mixed Exception::getCode ( void )

final public string Exception::getFile ( void )

final public int Exception::getLine ( void )

final public array Exception::getTrace ( void )

final public string Exception::getTraceAsString ( void )

public string Exception::__toString ( void )

final private void Exception::__clone ( void )

}

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User Contributed Notes 1 note

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Joey at anti-culture dot net ¶

13 years ago


In my opinion this exception is invaluable for validating arguments- for example providing strict typing a la C:

<?php
function tripleInteger($int)
{
  if(!is_int($int))
    throw new InvalidArgumentException('tripleInteger function only accepts integers. Input was: '.$int);
  return $int * 3;
}

$x = tripleInteger(4); //$x == 12
$x = tripleInteger(2.5); //exception will be thrown as 2.5 is a float
$x = tripleInteger('foo'); //exception will be thrown as 'foo' is a string
$x = tripleInteger('4'); //exception will throw as '4' is also a string

?>

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