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imagearc

(PHP 3, PHP 4, PHP 5)

imagearc -- Draws an arc

Descrizione

bool imagearc ( resource image, int cx, int cy, int width, int height, int start, int end, int color )

imagearc() draws an arc of circle centered at the given coordinates.

Elenco dei parametri

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

cx

x-coordinate of the center

cy

y-coordinate of the center

width

The arc width

height

The arc height

start

The arc start angle, in degrees.

end

The arc end angle, in degrees. 0° is located at the three-o'clock position, and the arc is drawn clockwise.

color

A color identifier created with imagecolorallocate()

Valori restituiti

Restituisce TRUE in caso di successo, FALSE in caso di fallimento.

Esempi

Esempio 1. Drawing a circle with imagearc()

<?php

// create a 200*200 image
$img = imagecreatetruecolor(200, 200);

// allocate some colors
$white = imagecolorallocate($img, 255, 255, 255);
$black = imagecolorallocate($img, 0, 0, 0);

// draw a black circle
imagearc($img, 100, 100, 150, 150, 0, 360, $black);

// output image in the browser
header("Content-type: image/png");
imagepng($img);

// free memory
imagedestroy($img);

?>

Vedere anche:

imagefilledarc()
imageellipse()
imagefilledellipse()



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