The InvalidArgumentException class

(PHP 5 >= 5.1.0)

Introduction

Exception thrown if an argument does not match with the expected value.

Class synopsis

InvalidArgumentException extends LogicException {

/* Inherited methods */

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 )

}

add a note User Contributed Notes InvalidArgumentException - [2 notes]

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Levi Morrison ¶

1 year ago


Note that Joey's code showing an example of using InvalidArgumentException uses is_int, but probably should use filter_var($int, FILTER_VALIDATE_INT).



Also, whether you should throw this function or OutOfRangeException when dealing with arrays is a bit unclear.  My personal preference is to throw InvalidArgumentException.

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Joey at anti-culture dot net ¶

2 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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