Draws an arc
Syntax
imagearc( GdImage $image, int $center_x, int $center_y, int $width, int $height, int $start_angle, int $end_angle, int $color ): bool
Parameters
image
A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().
center_x
x-coordinate of the center.
center_y
y-coordinate of the center.
width
The arc width.
height
The arc height.
start_angle
The arc start angle, in degrees.
end_angle
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().
Return
Returns true on success or false on failure.
Examples
1 · return
<? $width = 100; $height = 100; $image = imagecreate($width, $height); $red = 255; $green = 255; $blue = 255; $color = imagecolorallocate($image, $red, $green, $blue); $center_x = 50; $center_y = 50; $start_angle = 90; $end_angle = 360; $return = imagearc($image, $center_x, $center_y, $width, $height, $start_angle, $end_angle, $color); var_export($return); ?>
true
2 · base64
<? $width = 100; $height = 100; $image = imagecreatetruecolor($width, $height); $red = 255; $green = 255; $blue = 255; $color = imagecolorallocate($image, $red, $green, $blue); $center_x = 50; $center_y = 50; $start_angle = 90; $end_angle = 360; imagearc($image, $center_x, $center_y, $width, $height, $start_angle, $end_angle, $color); ob_start(); imagepng($image); $output = ob_get_clean(); echo '<!doctype html> <html> <body> <img src="data:image/png;base64,' . base64_encode($output) . '"> </body> </html>'; ?>
<!doctype html> <html> <body> <img src="data:image/png;base64,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"> </body> </html>