PHP imagecolorat - Get the color index value of a pixel

imagecolorat — Get the color index value of a pixel.

grammar

 int imagecolorat ( resource $image , int $x , int $y )

Returns the color index value of the pixel at the specified position in the graphic specified by image.

If PHP is compiled with GD library 2.0 or higher and the image is a true color image, this function returns the RGB value of the point as an integer. Use shifting and masking to get the values ​​of the red, green, and blue components.

Example

Get the respective RGB values.

 <?php$im = ImageCreateFromPng("codercto-logo.png");$rgb = ImageColorAt($im, 100, 25);$r = ($rgb >> 16) & 0xFF;$g = ($rgb > > 8) & 0xFF;$b = $rgb & 0xFF;?>

Related articles

imagecolorset() Sets the color for the specified palette index.

imagecolorsforindex() Gets the color of an index.