PHP 7.2 error: A non-numeric value encountered (tcpdi_parser.php( line 1052 ))

[michaelklopf]

I've got a special set of pdfs which cause this error in the following line:

tcpdi_parser/tcpdi_parser.php

Line 1052 in c7c3e86

$this->objstreamobjs[$ints[$j-1]] = array($key, $ints[$j]+$first);

It should be related to the warning here: http://php.net/manual/en/migration71.other-changes.php

According to XDebug it tries to do the following but fails:

$this->objstreamobjs["x��XmO#G��޿��/�Ec�K�[�EbḠܲ(���"] = [[3, 0], 218];

[michaelklopf]

Suppressing this error with @ gets me further, but is this a best practice here?

     $this->objstreamobjs[$ints[$j-1]] = @array($key, $ints[$j]+$first);

[supergert]

I encountered this same issue today (tcpdi_parser.php version 1.1).
It turns out to be inside the function decodeStream().
If the $sdic contains a /Filter with an array of filters ($v[0] = PDF_TYPE_ARRAY), it is skipped because of line 1132:
if ($v[0] == PDF_TYPE_TOKEN) {
Not sure why this line is needed at all in decodeStream().

[loginetsolutions]

I fix this by adding this line: $ints = array_values(array_filter($ints));
just before the for loop inside the function extractObjectStream
It will remove the empty elements and reindex the array. However, this will result in some reading errors.