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PHP function to generate rounded edge image from a source image

Function for creating rounded edge image from a source image. The parameters to the function are corner radius (the degree to which the corner gets rounded). Also you can specify which of the corners of the image you want to get it as a rounded edge

*********************CODE START********************

function image_round_edges($image_file, $corner_radius=20, $angle= 0, $topleft=true, $topright=true, $bottomleft=true, $bottomright=true){
$info = getimagesize($image_file);
case 1 : { $images = imagecreatefromgif($image_file); break;}//gif
case 2 : { $images = imagecreatefromjpeg($image_file); break; }//jpg
case 3 : { $images = imagecreatefrompng($image_file); break; }//png
default : { exit("Unsupporter file type"); }
print "Can't read required image data";


// Top-left corner
$background = imagecreatetruecolor($info[0],$info[1]);
imagecopymerge($background, $images, 0, 0, 0, 0, $info[0], $info[1], 100);
$im_temp = imagecreatetruecolor($startx,$starty);
imagecopyresampled($im_temp, $background, 0, 0, 0, 0, $startx, $starty, $info[0], $info[1]);
$bg = imagecolorallocate($im_temp, hexdec(substr($backcolor,0,2)),hexdec(substr($backcolor,2,2)),hexdec(substr($backcolor,4,2)));
$fg = imagecolorallocate($im_temp, hexdec(substr($forecolor,0,2)),hexdec(substr($forecolor,2,2)),hexdec(substr($forecolor,4,2)));

if ($topleft == true) {
imagearc($im_temp, $startsize, $startsize, $arcsize, $arcsize, 180,270,$bg);

// Bottom-left corner
if ($bottomleft == true) {
imagearc($im_temp, $startsize, $starty-$startsize,$arcsize, $arcsize, 90,180,$bg);

// Bottom-right corner
if ($bottomright == true) {
imagearc($im_temp, $startx-$startsize, $starty-$startsize,$arcsize, $arcsize, 0,90,$bg);

// Top-right corner
if ($topright == true) {
imagearc($im_temp, $startx-$startsize, $startsize,$arcsize, $arcsize, 270,360,$bg);

$newimage = imagecreatetruecolor($info[0],$info[1]);
imagecopyresampled($images, $im_temp, 0, 0, 0, 0, $info[0],$info[1],$startx, $starty);

case 1 : { imagegif($images, $image_file, 100); break;}//gif
case 2 : { imagejpeg($images, $image_file, 100); break; }//jpg
case 3 : { imagepng($images, $image_file, 100); break; }//png
default : { exit("Unsupporter file type"); break;}


********************CODE END***************


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