PHP | imagearc() Function

Last Updated : 23 Aug, 2019

The imagearc() function is an inbuilt function in PHP which is used to create an arc of a circle centered at the given coordinates. This function returns true on success or false on failure.

Syntax:

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

Parameters: This function accepts eight 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: It is used to set x-coordinate of the center.
$cy: It is used to set y-coordinate of the center.
$width: The width of arc.
$height: The height of arc.
$start: It is used to set the arc start angle, in degrees.
$end: It is used to set the arc end angle, in degrees. 0° is located at the three-o’clock position, and the arc is drawn clockwise.
$color: It sets the color of image. A color identifier created by imagecolorallocate() function.

Return Value: This function returns true on success or false on failure.

Below programs illustrate the imagearc() function in PHP.

Program 1:

<?php 
  
// It create the size of image or blank image. 
$image_size = imagecreatetruecolor(500, 300); 
  
// Set the background color of image. 
$bg = imagecolorallocate($image_size, 0, 103, 0); 
  
// Fill background with above selected color. 
imagefill($image_size, 0, 0, $bg);  
  
// Set the colors of image 
$white_color = imagecolorallocate($image_size, 255, 255, 255); 
$red_color = imagecolorallocate($image_size, 255, 0, 0); 
$green_color = imagecolorallocate($image_size, 0, 255, 0); 
$blue_color = imagecolorallocate($image_size, 0, 0, 255); 
  
// Draw the circle 
imagearc($image_size, 200, 150, 200, 200, 0, 360, $white_color); 
imagearc($image_size, 200, 150, 150, 150, 25, 155, $red_color); 
imagearc($image_size, 260, 110, 50, 50, 0, 360, $green_color); 
imagearc($image_size, 140, 110, 50, 50, 0, 360, $blue_color); 
  
// Output image in the browser 
header("Content-type: image/png"); 
imagepng($image_size); 
  
// Free memory 
imagedestroy($image_size); 
  
?> 

Output:

Program 2:

<?php 
  
// It create the size of image or blank image. 
$image_size = imagecreatetruecolor(500, 300); 
  
// Set the background color of image. 
$bg = imagecolorallocate($image_size, 0, 102, 0); 
  
// Fill background with above selected color. 
imagefill($image_size, 0, 0, $bg);  
  
// Set the colors of image 
$white_color = imagecolorallocate($image_size, 255, 255, 255); 
$red_color = imagecolorallocate($image_size, 255, 0, 0); 
$black_color = imagecolorallocate($image_size, 0, 0, 0); 
  
// Draw the arc circle image 
imagearc($image_size, 200, 150, 200, 200, 0, 360, $white_color); 
imagearc($image_size, 200, 150, 150, 150, 0, 360, $red_color); 
imagearc($image_size, 200, 150, 50, 50, 0, 360, $black_color); 
  
// Output image in the browser 
header("Content-type: image/png"); 
imagepng($image_size); 
  
// Free memory 
imagedestroy($image_size); 
  
?> 