$graph = new Graph(); $graph->SetTheme("default");
$graph = new Graph(); $theme_array = array( "background-color" => "#F0F0F0", "font-color" => "#000000", "line-color" => "#FF0000" ); $graph->SetTheme($theme_array);
$graph = new Graph(); $graph->SetTheme("nature");In these examples, we can see the SetTheme function being used to define the theme for a graph object. We can also see that the theme can be set using a pre-defined theme from a package library or a custom theme defined by the user. Based on the use of the Graph object, it is likely that this function is part of a package library for creating graphs and charts in PHP. One such package is the PHP Graph package.