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How to draw a partial arc and fill it using imagefilledarc() function in PHP?
imagefilledarc() is an inbuilt function in PHP that is used to draw a partial arc and fill it.
Syntax
bool imagefilledarc($image, $cx, $cy, $width, $height, $start, $end, $color, $style)
Parameters
imagefilledarc() takes nine parameters: $image, $cx, $cy, $width, $height, $start, $end, $color, and $style.
$image − It is returned by the image creation function imagecreatetruecolor(). This function is used to create the size of the image.
$cx − Sets the x-coordinate of the center.
$cy − Sets the y-coordinate of the center.
$width − Sets the arc width.
$height − Sets the arc height.
$start − Start angle in degrees.
$end − Arc end angle, in degrees. 00 is located at the three o'clock position, and the arc is drawn clockwise.
$color − It is a color identifier created with imagecolorallocate() function.
$style − Suggests how to fill the image and its values can be anyone from the following list −
IMG_ARC_PIE
IMG_ARC_CHORD
IMG_ARC_NOFILL
IMG_ARC_EDGED
Both IMG_ARC_PIE and IMG_ARC_CHORD are mutually exclusive.
IMG_ARC_CHORD connects a straight line from the starting and ending angles, while IMG_ARC_PIE produces a rounded edge.
IMG_ARC_NOFILL indicates that the arc or chord should be outlined, not filled.
IMG_ARC_EDGED is used together with the IMG_ARC_NOFILL, indicates that the beginning and ending angles should be connected to the center.
Return Values
It returns True on success and False on failure.
Example 1
<?php
define("WIDTH", 700);
define("HEIGHT", 550);
// Create the image.
$image = imagecreate(WIDTH, HEIGHT);
// Allocate colors.
$bg = $white = imagecolorallocate($image, 0x00, 0x00, 0x80);
$gray = imagecolorallocate($image, 122, 122, 122);
// make pie arc.
$center_x = (int)WIDTH/2;
$center_y = (int)HEIGHT/2;
imagerectangle($image, 0, 0, WIDTH-2, HEIGHT-2, $gray);
imagefilledarc($image, $center_x, $center_y, WIDTH/2,
HEIGHT/2, 0, 220, $gray, IMG_ARC_PIE);
// Flush image.
header("Content-Type: image/gif");
imagepng($image);
?>Output
.jpg)
Example 2
<?php // Created the image using imagecreatetruecolor function. $image = imagecreatetruecolor(700, 300); // Allocated the darkgray and darkred colors $darkgray = imagecolorallocate($image, 0x90, 0x90, 0x90); $darkred = imagecolorallocate($image, 0x90, 0x00, 0x00); // Make the 3D effect for ($i = 60; $i > 50; $i--) { imagefilledarc($image, 100, $i, 200, 100, 75, 360, $darkred, IMG_ARC_PIE); } imagefilledarc($image, 100, $i, 200, 100, 45, 75 , $darkgray, IMG_ARC_PIE); // flush image header('Content-type: image/gif'); imagepng($image); imagedestroy($image); ?>
Output
.jpg)
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