(PECL gmagick >= Unknown)
Gmagick::borderimage — Surrounds the image with a border
public Gmagick::borderimage ( GmagickPixel $color , int $width , int $height ) : Gmagick
Surrounds the image with a border of the color defined by the bordercolor GmagickPixel object or a color string.
color
GmagickPixel object or a string containing the border color
width
Border width
height
Border height
The Gmagick object with border defined
Throws an GmagickException on error.
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https://www.php.net/manual/en/gmagick.borderimage.php