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PhpDig is a PHP MySQL based
Web Spider & Search Engine.



pdf_setmiterlimit — Sets miter limit


bool pdf_setmiterlimit(pdf, value);
resource pdf: PDF object identifier
double value: Mitre ratio


Always TRUE


When the join in pdf_setlinejoin() is set to 0 (a miter join), the joining of two lines at a steep angle can result in a large peak which may look unattractive. Using pdf_setmiterlimit() , the ratio of line width to mitre length is calculated and if the result exceeds the mitre limit then the join type is automatically changed to a bevel.


Since versions 3.0.6 and 4.0


Example 980. Control mitre limit


// create new document
$pdf = pdf_new();
pdf_begin_page($pdf, 500, 700);

// widen line to show effect

// set miter join
pdf_setlinejoin($pdf, 0);

// draw normal intersecting lines
pdf_moveto($pdf, 200, 600);
pdf_lineto($pdf, 250, 500);
pdf_lineto($pdf, 300, 600);

// draw very wide line

// set miter limit
pdf_setmiterlimit($pdf, 2);

// draw capped intersecting line
pdf_moveto($pdf, 200, 500);
pdf_lineto($pdf, 250, 400);
pdf_lineto($pdf, 300, 500);


// output 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 The authors of this book have elected not to choose any options under the OPL. This online book was obtained from 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.

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