How to generate a pie chart in php drawing, generate a pie in php drawing_PHP tutorial

How to generate pie chart by php drawing, generate pie by php drawing

The example in this article describes how to generate a pie chart using PHP drawing. Share it with everyone for your reference. The details are as follows:

The function to be implemented here is a population distribution proportion map, which consists of sectors forming a circle, and each sector has a different color.

Copy code The code is as follows:

$array = array("Beijing"=>1925,"Shanghai"=>2016,"Guangzhou"=>1256,"Shenzhen"=>980);
$arr_key = array_keys($array);
$color = array();
$im = imagecreatetruecolor(300,300);
for($i=1;$i<=count($array);$i++){
$color[] = imagecolorallocate($im,rand(0,255),rand(0,255),rand(0,255));
}

//Create a pie chart, composed of multiple sectors
$a1=rand(0,360);
$sum = array_sum($array);
for($j=0;$j $a2 = $a1 + $arr_key[$j]/$sum*360;
imagefilledarc($im,150,150,180,80,$a1,$a2,$color[$j],IMG_ARC_PIE);
$a1 = $a2;
}

//Output image
header("content-type: image/png");
imagepng($im);
//Close
imagedestroy($im);
?>

I hope this article will be helpful to everyone’s PHP programming design.

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