imagesetthickness

Set the thickness for line drawing (PHP 4 >= 4.0.6)
void imagesetthickness ( resource image, int thickness )

imagesetthickness() sets the thickness of the lines drawn when drawing rectangles, polygons, ellipses etc. etc. to thickness pixels.

Note:

This function was added in PHP 4.0.6 and requires GD 2.0.1 or later

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