Longhorn PHP 2019 Schedule

The InvalidArgumentException class

(PHP 5 >= 5.1.0, PHP 7)

Introduction

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

Class synopsis

InvalidArgumentException extends LogicException {
/* Inherited properties */
protected string $message ;
protected int $code ;
protected string $file ;
protected int $line ;
/* Inherited methods */
final public Exception::getMessage ( void ) : string
final public Exception::getPrevious ( void ) : Throwable
final public Exception::getCode ( void ) : mixed
final public Exception::getFile ( void ) : string
final public Exception::getLine ( void ) : int
final public Exception::getTrace ( void ) : array
final public Exception::getTraceAsString ( void ) : string
public Exception::__toString ( void ) : string
final private Exception::__clone ( void ) : void
}
add a note add a note

User Contributed Notes 1 note

up
24
Joey at anti-culture dot net
8 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

?>
To Top