Why, php? WHY???

console

PHP Fatal error:  Uncaught exception 'LogicException' with message 'The parent constructor was not called: the object is in an invalid state ' in splfileobject.php:16
Stack trace:
splfileobject.php(16): SplFileInfo->_bad_state_ex()
#1 {main}
  thrown in splfileobject.php on line 16

Fatal error: Uncaught exception 'LogicException' with message 'The parent constructor was not called: the object is in an invalid state ' in splfileobject.php:16
Stack trace:
#0 splfileobject.php(16): SplFileInfo->_bad_state_ex()
#1 {main}
  thrown in splfileobject.php on line 16

splfileobject.php

<?php

class cls1 extends \SplFileObject
{
    public function __construct()
    {
    }

    public function fpassthru()
    {
        // does nothing
    }
}

$cl = new cls1;
$cl->fpassthru();

Some internal PHP classes enforce parent constructor call...
If your constructor does nothing, just don't implement it to fallback to the parent one.

Or simply write

parent::__construct();

in your constructor.

afaik. the SplFileObject sets the required parameter $filename passed to parent::__construct as a private property that is used for all other methods provided by the class.

I'm really no theoretical OOP-Expert, but if you extend a parent Class that requires a parameter in its __construct, and this parameter is set as a protected property.
Isn't it the responsibility of the Child-Class to either initialize the Object corretctly or to call the parent __construct ?

@thephpdeveloper This wont work either.

SplFileObject requires a valid path to an existing file.

@gries i'm actually trying to mock this class, not extend.

@everzet yeah you extend it to create a mock, but you extend it.
I asked the internals-list they basically say: "this is the way the class is designed deal with it"
I am right now editing the documentation to add a INFO section that makes the user aware of this issue.

class cls1 extends \SplFileObject
{
    public function __construct()
    {
        parent::__construct('php://memory');
    }

    public function fpassthru()
    {
        // does nothing
    }
}

@everzet : I think @mageekguy found a way to mock these class in atoum. Perhaps you could ask him for tips ;)

@jubianchi there's no clean way to mock this class. And i already know dirty one...

$fileObject = $this->getMock('SplFileObject', [], ['php://memory']);

Thank you for posting that solution! Just stumbled across this in Google while trying to mock the same object. You saved me a bunch of time I'm sure!

@nackjicholson thanks for that one!

You are the bomb @nackjicholson

For anyone who wants details about what is actually happening here;

SplFileObject will throw this error if you either;

1. Do not call the parent::__construct() at all.
   or
2. If you try to call other class methods (e.g. $this->callSomething()) BEFORE calling he parent::__construct(). The scope of the called method is irrelevant, so if you are calling a native SplFileObject/SplFileInfo method or a method in the scope of your superclass it will error. You can do other things before the parent::__construct() as long as they are not interacting with $this, parent:: or self:: (not sure about static methods. I assume the same goes for reading/writing properties but I haven't tested this. Ensure that anything you need to do is done pre-parent construct is done directly in the superclass construct and not abstracted to other methods if you can help it.