Some PDF documents contain text that I can't extract

[cyril-fsm]

• PHP Version: 7.4.11
• PDFParser Version: 2.11

Description:

Hello,
Some pdf documents seem impossible to parse (text extraction). What is the reason and what can I do? Thank you for your help.

PDF input

https://telechargements.soludedia.fr/divers/LFMF.pdf

Expected output & actual output

Code

if($f = file_get_contents('file.pdf')){
	
	include "./inc/pdfparser-2024/alt_autoload.php";
	$parser = new \Smalot\PdfParser\Parser();
	$document = $parser->parseContent($f);
	$pages    = $document->getPages();
	$page     = $pages[0];
	$content  = $page->getText();
		
	echo '<pre>' . $content . '</pre>';
}

[k00ni]

What do you mean with impossible to parse (text extraction)? Please be more specific.

[cyril-fsm]

Hello, I get a sequence of characters unrelated to the text of the pdf.
Instead of:

ATTERRISSAGE A VUE
Visual landing

FAYENCE
AD 2 LFMF ATT 01

Ouvert à la CAP
Public air traffic
30 NOV 23

ALT AD : 738 (27 hPa)
LFMF
LAT : 43 36 29 N
VAR : 2° E (20)
LONG : 006 42 06 E
...

I get

��
���
�� !"#�$"#
���������
�%&'(!
 ���
�$"�(!)*&'!
������
��������
������
������
�
�+#�#&%",!
 �������
�-�� .�� ���
������ ������������	��������� �������
��������������
��������
�� ����� ���
/%0%(1/%0%(1
���2�32���2�32
4!� 5!( !
-&�24$1
4!� 5!( !
-&�24$1
4!��4%"
�2#&
4!��4%"
�2#&
4!��4%"
�.'!#&
4!��4%"
�.'!#&
4!�6$'((!
�7'
6%#8'!
4!�6$'((!
�7'
6%#8'!
-&�24$1-&�24$1
4!#
�'%&(!�35! �"#
4!#
�'%&(!�35! �"#
4!#
34$&#
4!#
34$&#
4!#
3($'�#
4!#
3($'�#
�$ 9%(7�!�$ 9%(7�!
4!#
6'(!#
4!#
6'(!#
4!
35!)%4�!(
4!
35!)%4�!(
...

[netants2015]

I get same error. There are text boxes in the document. The content in the text boxes is in Chinese, but it is garbled when read. The Chinese in other parts is displayed normally.

^g*yÑb€g –PQlSø 4