&lt;pre style='white-space:pre-line'&gt;<br />
<b>Warning</b>:  Undefined array key "argc" in <b>/opt/homebrew/var/www/php/phplot-6.2.0/contrib/color_range.test1.php</b> on line <b>24</b><br />
&lt;/pre&gt;&lt;pre style='white-space:pre-line'&gt;<br />
<b>Fatal error</b>:  Uncaught Error: Undefined constant &quot;STDERR&quot; in /opt/homebrew/var/www/php/phplot-6.2.0/contrib/color_range.test1.php:10
Stack trace:
#0 /opt/homebrew/var/www/php/phplot-6.2.0/contrib/color_range.test1.php(24): usage()
#1 {main}
  thrown in <b>/opt/homebrew/var/www/php/phplot-6.2.0/contrib/color_range.test1.php</b> on line <b>10</b><br />
&lt;/pre&gt;