Description:
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Some modified code from manual, create 2 pages in PDF file

Reproduce code:
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<?php
$cpdf = cpdf_open(0);

cpdf_page_init($cpdf, 1, 0, 595, 842, 1.0);
$b = cpdf_add_outline($cpdf, 0, 0, 0, 1, "Page 1");
cpdf_begin_text($cpdf);
cpdf_set_font($cpdf, "Times-Roman", 30, "WinAnsiEncoding");
cpdf_set_text_rendering($cpdf, 1);
cpdf_text($cpdf, "Times Roman outlined", 50, 50);
cpdf_end_text($cpdf);
cpdf_moveto($cpdf, 50, 50);
cpdf_lineto($cpdf, 740, 330);
cpdf_stroke($cpdf);
cpdf_finalize_page($cpdf, 1);

cpdf_page_init($cpdf, 2, 0, 595, 842, 1.0);
cpdf_add_outline($cpdf, $b, 0, 0, 2, "Page 2");
cpdf_begin_text($cpdf);
cpdf_set_font($cpdf, "Times-Roman", 30, "WinAnsiEncoding");
cpdf_set_text_rendering($cpdf, 1);
cpdf_text($cpdf, "Times Roman outlined", 50, 50);
cpdf_end_text($cpdf);
cpdf_moveto($cpdf, 50, 50);
cpdf_lineto($cpdf, 740, 330);
cpdf_stroke($cpdf);
cpdf_finalize_page($cpdf, 2);

cpdf_finalize($cpdf);
Header("Content-type: application/pdf");
cpdf_output_buffer($cpdf);
cpdf_close($cpdf);
?> 

Expected result:
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2 Pages + 2 Bookmarks, Bookmark "Page 1" refers to first page, "Page 2" to second page.

Actual result:
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2 Pages + 2 Bookmarks, Bookmark "Page 1" refers to second page, "Page 2" to second (or not) page.