imagearc(3) [php man page]
IMAGEARC(3) 1 IMAGEARC(3) imagearc - Draws an arc SYNOPSIS
bool imagearc (resource $image, int $cx, int $cy, int $width, int $height, int $start, int $end, int $color) DESCRIPTION
imagearc(3) draws an arc of circle centered at the given coordinates. PARAMETERS
o $ image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3). o $cx - x-coordinate of the center. o $cy - y-coordinate of the center. o $width - The arc width. o $height - The arc height. o $start - The arc start angle, in degrees. o $end - The arc end angle, in degrees. 0o is located at the three-o'clock position, and the arc is drawn clockwise. o $color - A color identifier created with imagecolorallocate(3). RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Drawing a circle with imagearc(3) <?php // create a 200*200 image $img = imagecreatetruecolor(200, 200); // allocate some colors $white = imagecolorallocate($img, 255, 255, 255); $red = imagecolorallocate($img, 255, 0, 0); $green = imagecolorallocate($img, 0, 255, 0); $blue = imagecolorallocate($img, 0, 0, 255); // draw the head imagearc($img, 100, 100, 200, 200, 0, 360, $white); // mouth imagearc($img, 100, 100, 150, 150, 25, 155, $red); // left and then the right eye imagearc($img, 60, 75, 50, 50, 0, 360, $green); imagearc($img, 140, 75, 50, 50, 0, 360, $blue); // output image in the browser header("Content-type: image/png"); imagepng($img); // free memory imagedestroy($img); ?> The above example will output something similar to:[NOT DISPLAYABLE MEDIA]Output of example : Drawing a circle with imagearc() SEE ALSO
imagefilledarc(3), imageellipse(3), imagefilledellipse(3). PHP Documentation Group IMAGEARC(3)
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IMAGECOLORALLOCATE(3) 1 IMAGECOLORALLOCATE(3) imagecolorallocate - Allocate a color for an image SYNOPSIS
int imagecolorallocate (resource $image, int $red, int $green, int $blue) DESCRIPTION
Returns a color identifier representing the color composed of the given RGB components. imagecolorallocate(3) must be called to create each color that is to be used in the image represented by $image. Note The first call to imagecolorallocate(3) fills the background color in palette-based images - images created using imagecreate(3). PARAMETERS
o $ image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3). o $red -Value of red component. o $green -Value of green component. o $blue -Value of blue component. These parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF. RETURN VALUES
A color identifier or FALSE if the allocation failed. Warning This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on Booleans for more information. Use the === operator for testing the return value of this function. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.1.3 | | | | | | | Returns FALSE if the allocation failed. Previ- | | | ously -1 was returned. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 imagecolorallocate(3) example <?php $im = imagecreate(100, 100); // sets background to red $background = imagecolorallocate($im, 255, 0, 0); // sets some colors $white = imagecolorallocate($im, 255, 255, 255); $black = imagecolorallocate($im, 0, 0, 0); // hexadecimal way $white = imagecolorallocate($im, 0xFF, 0xFF, 0xFF); $black = imagecolorallocate($im, 0x00, 0x00, 0x00); ?> SEE ALSO
imagecolorallocatealpha(3), imagecolordeallocate(3). PHP Documentation Group IMAGECOLORALLOCATE(3)