How to use php to create a line chart function

I’m glad that everyone has such a soft spot for PHP (as the current mainstream development language)!
The following will introduce to you the function of making line graphs in PHP (as the current mainstream development language):

/*
Function description
$data: y-axis data (array)
$graphdata: y-axis data--percentage ( Array)
$label: x-axis data (array)
$height: image height
$width: image width
$font: font size
$dot: determine the size of the point
$bg: background color
$line: line color
$text: Text color
$dotcolor: Dot color
$file: Output image file name
*/

function qximage($data,
$graphdata,
$label,
$height,
$width,
$font,
$dot,
$bg,
$line,
$text,
$dotcolor,
$file)
{
$jc=$height/100;
$fontwidth= imagefontwidth ($font);
$fontheight=imagefontheight ($font);

$image= imagecreate ($width,$height+20);
$bg= imagecolorallocate($image,$bg[0],$bg[1],$bg[2]);
$line=imagecolorallocate($image ,$line[0],$line[1],$line[2]);
$text=imagecolorallocate($image ,$text[0],$text[1],$text [2]);
$dotcolor=imagecolorallocate($image,$dotcolor[0],$dotcolor[1],$$dotcolor[2]);
imageline ($image,0,0,0,$height,$ line);
imageline($image,0,$height,$width,$height,$line);
for ($i=1;$i<11;$i++)
{
imagedashedline($image,0, $height - $jc*$i*10 ,$width ,$height -$jc*$i*10 ,$line );
imagestring ($image,$font,0,$height-$jc*$i*10 ,$i*10,$text);
}
for ($i=0;$i {
#echo $tmp."
";
$x1=(($width-50)/count($data) )*($i)+40;
#echo $x1 ."
";
$y1=$height-$graphdata[$i]*$jc;
$x2=$x1;
$y2=$y1+$ graphdata[$i]*$jc;
#echo $y1."
";
imagestring($image,$font,$x1,$y1-2*$fontheight,$graphdata[$i]."%(" .$data[$i].")",$text);
imagearc ($image,$x1 ,$y1,$dot,$dot,0,360,$dotcolor);
imagefilltoborder ($image,$x1,$ y1,$dotcolor,$dotcolor);
imagestring ($image,$font,$x1,$y2,$label[$i],$text);
if ($i>0)
{
imageline($image ,$tmpx1,$tmpy1,$x1,$y1,$line);
}
$tmpx1=$x1;$tmpy1=$y1;
}
imagegif ($image,$file);
}
?>