Fix calls passing the right scalar type

[franmomu]

Q	A
Bug fix?	no
New feature?	no
BC breaks?	no
Deprecations?	no
Tests pass?	yes
Fixed tickets	-
License	Apache2

Description

In order to be able to use declare(strict_types=1), I've changed some functions that require an specific type. The changes are:

• debug_backtrace expects an int.
• DOMElement::setAttribute expects a string as second argument.
• Some of the changes are because using SplFileInfo as string, so I casted it.
• substr, basename, strrpos and file_get_contents expects a string as first argument.

[goetas]

can you check the test failure?

[franmomu]

can you check the test failure?

Apparently some tests were failing intermittently. It was always about not finding one file that it is created and removed in another test. So I changed the configuration for that test to write that file in another directory, not sure if it was the problem, but now they pass.

You can try to re-run the tests a couple of time to see if it works.

[goetas]

Thanks