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# pdf_circle

(PHP 3>= 3.0.6, PHP 4 , PHP 5)

pdf_circle -- Draws a circle

## Description

bool pdf_circle ( resource pdfdoc, float x, float y, float r)

Add a circle with center (x, y) and radius r to the current page. Actual drawing of the circle is performed by the next stroke or fill operation.

成功回傳`TRUE`失敗回傳`FALSE`。

示範 1.pdf_circle() example

`<?php
// prepare document
$pdf = pdf_new();
pdf_open_file($pdf, "");
pdf_begin_page($pdf, 595, 842);
// an outlined circle
pdf_circle($pdf, 200, 700, 100);
pdf_stroke($pdf);
// a filled circle
pdf_circle($pdf, 200, 700, 50);
pdf_fill($pdf);
// an outlined and filled circle
pdf_setcolor($pdf, "fill", "gray", 0.3);
pdf_circle($pdf, 400, 700, 50);
pdf_fill_stroke($pdf);
// finish document
pdf_end_page($pdf);
pdf_close($pdf);
header("Content-type: application/pdf");
echo pdf_get_buffer($pdf);
pdf_delete($pdf);
?>`

See also: pdf_arc(), pdf_arcn(), pdf_curveto(), pdf_stroke(), pdf_fill() and pdf_fill_stroke().

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