Rect value for some PDF form fields doesn't contain floating point numbers but rather strings like #Obj#32_0

• PHP Version: 8.1.2-1ubuntu2.18
• PDFParser Version: 2.11.0

Description:

The attached PDF contains 3x form fields. The Rect key for one of those form fields contains 4x floating point numbers, presumably representing the coordinates of that form field on the PDF, however, the other two form fields contain strings - #Obj#32_0 - #Obj#35_0. idk what these strings means and if there's a way to get coordinates from those strings it's unclear to me what that method might be.

PDF input

test.pdf

Expected output

Array
(
    [P] => Array
        (
            [Type] => Page
            [Rotate] => 0
        )

    [T] => incomeName1
    [Rect] => Array
        (
            [0] => 205.35
            [1] => 717.601
            [2] => 540.298
            [3] => 740.74
        )

    [F] => 4
    [Type] => Annot
    [Subtype] => Widget
    [DA] => /Helv 12 Tf 0 g
    [MK] => Array
        (
        )

    [FT] => Tx
)

Actual output

Array
(
    [P] => Array
        (
            [Type] => Page
            [Rotate] => 0
        )

    [T] => PatientsIncomeSS
    [Rect] => Array
        (
            [0] => #Obj#32_0
            [1] => #Obj#33_0
            [2] => #Obj#34_0
            [3] => #Obj#35_0
        )

    [F] => 4
    [Type] => Annot
    [Subtype] => Widget
    [DA] => /Helv 12 Tf 0 g
    [MK] => Array
        (
        )

    [FT] => Tx
)

Code

<?php
include('vendor/autoload.php');

$parser = new \Smalot\PdfParser\Parser();
$pdf = $parser->parseFile('test.pdf');

$objects = $pdf->getObjects();
foreach ($objects as $obj) {
    print_r($obj->getDetails());
}

Reproduce the issue with the linked test.pdf and the shown Parser, parseFile(), getObjects(), and getDetails() calls. Trace how the affected form fields' Rect values are represented and compare them with the field that already contains floating-point coordinates. Done means the reported fields expose usable coordinate values or the limitation is clearly documented.