IMAGECOLORRESOLVEALPHA(3)						 1						 IMAGECOLORRESOLVEALPHA(3)

imagecolorresolvealpha - Get the index of the specified color + alpha or its closest possible alternative

SYNOPSIS
int imagecolorresolvealpha (resource $image, int $red, int $green, int $blue, int $alpha) DESCRIPTION
This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative. 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. o $alpha - A value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent. The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF. RETURN VALUES
Returns a color index. EXAMPLES
Example #1 Using imagecoloresolvealpha(3) to get colors from an image <?php // Load an image $im = imagecreatefromgif('phplogo.gif'); // Get closest colors from the image $colors = array(); $colors[] = imagecolorresolvealpha($im, 255, 255, 255, 0); $colors[] = imagecolorresolvealpha($im, 0, 0, 200, 127); // Output print_r($colors); imagedestroy($im); ?> The above example will output something similar to: Array ( [0] => 89 [1] => 85 ) NOTES
Note This function requires GD 2.0.1 or later (2.0.28 or later is recommended). SEE ALSO
imagecolorclosestalpha(3). PHP Documentation Group IMAGECOLORRESOLVEALPHA(3)