int pdf_open_gif(int pdf document, string filename);The PDF_open_gif() function opens an image stored in the file with the name filename. The format of the image has to be gif. The function returns a pdf image identifier.
Example 1. Including a gif image <?php
$im = PDF_open_gif($pdf, "test.gif");
pdf_place_image($pdf, $im, 100, 100, 1);
pdf_close_image($pdf, $im);
?>
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See also PDF_close_image(), PDF_open_jpeg(), PDF_open_memory_image(), PDF_execute_image(), PDF_place_image(), PDF_put_image().