imagefilledarc() Drawing of arcs by filling with colours using gd support in PHP

<?Php
header ("Content-type: image/jpeg");
$width=300;$height=300;
$im = @ImageCreate ($width,$height) // added one pixel for border
or die ("Cannot Initialize new GD image stream");
$background_color = ImageColorAllocate ($im, 255, 255, 255);
$filled_color = ImageColorAllocate ($im, 255, 0,0);
imagefilledarc($im,150,150,290,290,0,160,$filled_color,IMG_ARC_PIE);
Imagejpeg($im);
imagedestroy($im); //memory cleared. 
?>

Syntax

imagefilledarc($image,$center_x,$center_y,$width,$height,
	$start_angle,$end_angle,$color,$style)

Returns true or false based on success of failure.

`$image`	Image created using ImageCreate() or imagecreatetruecolor()
`$center_x`	x coordinate of center ( X : Horizontal )
`$center_y`	y coordinate of center ( Y : Vertical )
`$width`	Width of the arc
`$height`	Height of the arc
`$start_angle`	Angle of the start in degree. 3 Oclock position is 0 degree.
`$end_angle`	Angle of the end of the arc in degree.
`$color`	Color to fill the arc by using imagecolorallocate().
`$style`	Take values : IMG_ARC_PIE,IMG_ARC_CHORD,IMG_ARC_NOFILL,IMG_ARC_EDGED.

Drawing filled arc, circles & patterns using colours and angles by imagefilledarc() in PHP GD

Creating full circle using imagefilledarc()

We need to maintain $width and $height equal , $start_angle should be 0 (degree ) and $end_angle should be 360 ( degree ). By using imagearc() we created one face, to this image now we will be adding eye balls by using imagefilledard().

Example

Face with eye balls using imagefilledarac

<?Php
header ("Content-type: image/jpeg");
$width=300;$height=300;
$im = @ImageCreate ($width,$height) // added one pixel for border
or die ("Cannot Initialize new GD image stream");

$background_color = ImageColorAllocate ($im, 255, 255, 255);
$text_color = ImageColorAllocate ($im, 255, 0,0);
imagearc($im,150,150,290,290,0,360,$text_color); // outer face
imagearc($im,80,100,50,50,0,360,$text_color); // left eye 
imagearc($im,220,100,50,50,0,360,$text_color); // right eye
imagearc($im,150,150,150,150,45,135,$text_color); // mouth

$text_color = ImageColorAllocate ($im, 128, 128,0);
imagefilledarc($im,80,100,20,20,0,360,$text_color,IMG_ARC_PIE); // left eye ball 
imagefilledarc($im,220,100,20,20,0,360,$text_color,IMG_ARC_PIE); // right eye ball 

Imagejpeg($im);
imagedestroy($im); //memory cleared. 
?>

By changing the position of eye ball we can create different type of face ( emoji )

$move_left=0;
$move_top=15;

$move_left=15;
$move_top=0;

$move_left=0; // x position is not changed 
$move_top=15; // Y position is moved up 
imagefilledarc($im,80-$move_left,100-$move_top,20,20,0,360,$text_color,IMG_ARC_PIE); // left eye ball 
imagefilledarc($im,220-$move_left,100-$move_top,20,20,0,360,$text_color,IMG_ARC_PIE); // right eye ball

Try to create different movement of eye balls and mouth arc representing different face expressions ( emoji )

Concentric circle using imagefilledarc()

Random numbers are gnerated between 1 and 255 for adding differnt colors. Common center for all the circles.
Filled concentric Circles using imagefilledarc

Filled concentric Circles using imagefilledarc

<?Php
header ("Content-type: image/jpeg");
$width=301;$height=301;
$im = @ImageCreate ($width,$height) // added one pixel for border
or die ("Cannot Initialize new GD image stream");
$gap=20; // change this value to increase the lines 
$background_color = ImageColorAllocate ($im, 255, 255, 255);
imagesetthickness($im,1);
$text_color = ImageColorAllocate ($im, 255, 0,0);
for($i=0;$i<=$width;$i +=$gap){
$r=rand(1,255); // random numbers 
$g=rand(1,255);  
$b=rand(1,255);	
$text_color = ImageColorAllocate ($im, $r, $g,$b);		
imagefilledarc($im,$width/2,$height/2,($width)-$i,($height)-$i,0,360,$text_color,IMG_ARC_PIE);
}

Imagejpeg ($im);
imagedestroy($im); //memory is removed. 
?>

We can keep height and width of the arcs constant and change the starting and ending angles of the arcs. The $gap we will reduce here.
Change in angles of Filled concentric Circles

Change in angles of Filled concentric Circles

imagefilledarc($im,$width/2,$height/2,$width,$height,$i,$i+$gap,$text_color,IMG_ARC_PIE);

GD functions GD imagearc() GD imagerectangle() imageellipse()

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imagefilledarc(): arc using PHP GD

Creating full circle using imagefilledarc()

Example

Concentric circle using imagefilledarc()

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