Draws an arc with the curve origin (0 degrees) starting at x , y . The arcs curves up and to the left from the origin point in an anticlockwise direction. Some trial and error may be required to understand how the arc behaves when not using start and and end angles which are not 0 degrees. Don't forget to use pdf_stroke() to stroke the object.
In the example below, compare the output with that from pdf_arc() .
<?php // create a new document $pdf = pdf_new(); pdf_open_file($pdf); pdf_begin_page($pdf, 500, 700); // draw arc from 90 to 180 degrees pdf_arcn($pdf, 200, 350, 50, 90, 180); pdf_stroke($pdf); $font = pdf_findfont($pdf, "Courier", "host", 0); pdf_setfont($pdf, $font, 20); pdf_show_xy($pdf, "Hello World", 200, 350); // draw second arc from 270 to 0 degrees pdf_arcn($pdf, 330, 350, 50, 270, 0); pdf_stroke($pdf); pdf_end_page($pdf); pdf_close($pdf); // display the PDF document $data = pdf_get_buffer($pdf); header("Content-type: application/pdf"); header("Content-disposition: inline; filename=test.pdf"); header("Content-length: " . strlen($data)); echo $data; ?>
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.