SetLegendPixels — Position the legend on the image (device coordinates)
$plot->SetLegendPixels($x, $y)
$x
$y
SetLegendPixels lets you position the legend on the image, using device coordinates, rather than letting PHPlot position it for you.
SetLegendPixels
Absolute device coordinates of the upper left corner of the legend box. The units are pixels and the origin is in the upper left corner of the image.
See also SetLegendWorld.