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imagecolorat
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imagecolorat

Name

imagecolorat — Obtains the color at a specific point in an image.

Synopsis

int imagecolorat(image, x, y); int image: Image identifier int x: X coordinate int y: Y coordinate

Returns

Color index

Description

Creates a new color based on the color value at the specified x and y coordinates. If using imagecreatefromgif() , this is an ideal way to determine and use colors in the base image.

Example

Example 394. Make the background color transparent

// creates a transparent image
header("Content-type: image/png");
$im = imagecreatefrompng("test_image.png");
$bg_color = imagecolorat($im, 1, 1);
imagecolortransparent($im, $bg_color);
imagepng($im);
imagedestroy($im);

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