PHP | imagefilledarc() Function

The imagefilledarc() function is an inbuilt function in PHP which is used to draws a partial arc centered at the specified coordinate in the given image. This function return True on success or False on failure

Syntax:

bool imagefilledarc ( $image, $cx, $cy, $width, $height, $start, 
$end, $color, $style )

Parameters: This function accepts nine parameters as mentioned above and described below:

• $image: It is returned by one of the image creation functions, such as imagecreatetruecolor(). It is used to create size of image..
• $cx: This parameter is used to set the x-coordinate of the center.
• $cy: This parameter is used to set the y-coordinate of the center.
• $width: This parameter is used to set the arc width.
• $height: This parameter is used to set 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().
• $style: Suggest how to fill the image and its values can be any one among the value listed below.
  • IMG_ARC_PIE
  • IMG_ARC_CHORD
  • IMG_ARC_NOFILL
  • IMG_ARC_EDGED

Return Values: This function returns True on success or False on failure.

Below programs illustrate the imagefilledarc() function in PHP:

Program 1:

<?php

define("WIDTH", 300);
define("HEIGHT", 300);

// Create image.
$img = imagecreate(WIDTH, HEIGHT);

// Allocate colors.
$bg = $white = imagecolorallocate($img, 0xFF, 0xFF, 0xFF);
$green = imagecolorallocate($img, 0, 255, 0);

// make pie arc.
$center_x = (int)WIDTH/2;
$center_y = (int)HEIGHT/2;
imagerectangle($img, 0, 0, WIDTH-1, HEIGHT-1, $green);
imagefilledarc($img, $center_x, $center_y, WIDTH/2,
               HEIGHT/2, 0, 220, $green, IMG_ARC_PIE);

// Flush image.
header("Content-Type: image/png");
imagepng($img);
?>

Output:

Program 2:

<?php

// Create image
$image = imagecreatetruecolor(100, 100);

// Allocate some colors
$red      = imagecolorallocate($image, 0xFF, 0x00, 0x00);
$darkred  = imagecolorallocate($image, 0x90, 0x00, 0x00);

// Make the 3D effect
for ($i = 60; $i > 50; $i--) {
   imagefilledarc($image, 50, $i, 100, 50, 75, 360, $darkred, IMG_ARC_PIE);
}
imagefilledarc($image, 50, 50, 100, 50, 75, 360, $red, IMG_ARC_PIE);

// flush image
header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
?>

Output:

Reference: http://php.net/manual/en/function.imagefilledarc.php