PHP 忒聊
綴豖
ヶ輛
imagecolorat
(PHP 3, PHP 4)
Description
Returns the index of the color of the pixel at the specified location in the image specified by image.
If PHP is compiled against GD library 2.0 or higher and the image is a truecolor image, this function returns the RGB value of that pixel as integer. Use bitshifting and masking to access the distinct red, green and blue component values:
瞰赽 1. Access distinct RGB values
?php $im = ImageCreateFromPng("rockym.png"); $rgb = ImageColorAt($im, 100, 100); $r = ($rgb 16) 0xFF; $g = ($rgb 8) 0xFF; $b = $rgb 0xFF;?
See also imagecolorset() and imagecolorsforindex().
綴豖
れ萸
ヶ輛
imagecolorallocate
奻珨撰
imagecolorclosest