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); ?> |
Output:
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