The InvalidArgumentException class

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

简介

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

类摘要

InvalidArgumentException 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

Joey at anti-culture dot net 02-Feb-2011 09:08


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



?>