We will see a number of graphs on a number of sites showing graphs, such as the number of places in three regions or achievements, etc., to introduce a piece of PHP generated by the fan percentage display program code, but use it first need to have PHPGD library support.
Copy CodeThe code is as follows:
Fill the parameters of the chart
$ChartDiameter = 60; Chart diameter
$ChartData = Array (30,70);//The data used to generate the chart can be obtained from the database to be determined or multiple but corresponding to the color array
Convert the angle to radians
function radians ($degrees) {return ($degrees * (pi ()/180.0));}
Gets the value of the X, Y point on the Circle Circle (0,0)
function Circle_point ($degrees, $diameter) {$x =cos (radians ($degrees)) * ($diameter/2); $y =sin (radians ($degrees)) * ($ DIAMETER/2); return (Array ($x, $y));}
Determine the size of a graphic
$ChartWidth = $ChartDiameter + 20;
$ChartHeight = $ChartDiameter + 20;
Determine the total number of statistics
$ChartTotal = "";
for ($index = 0; $index < count ($ChartData); $index + +) {
$ChartTotal + = $ChartData [$index];
}
$ChartCenterX = $ChartDiameter/2 + 10;
$ChartCenterY = $ChartDiameter/2 + 10;
Generate Blank Graphics
$image = Imagecreate ($ChartWidth, $ChartHeight);
assigning colors
$colorBody = Imagecolorallocate ($image, 0xFF, 0xFF, 0xFF);
$colorBorder = Imagecolorallocate ($image, 0x00, 0x00, 0x00);
$colorText = Imagecolorallocate ($image, 0x00, 0x00, 0x00);
$colorSlice [] = Imagecolorallocate ($image, 0xFF, 0x00, 0x00);//This is the color corresponding to the array you wrote above
$colorSlice [] = Imagecolorallocate ($image, 0x00, 0xFF, 0x00);
Fill the back border
Imagefill ($image, 0, 0, $colorBody);
Draw every fan
$Degrees = 0;
for ($index = 0; $index < count ($ChartData); $index + +) {
$StartDegrees = round ($Degrees);
$Degrees + = (($ChartData [$index]/$ChartTotal) *360);
$EndDegrees = round ($Degrees);
$CurrentColor = $colorSlice [$index% (count ($colorSlice))];
Drawing F
Imagearc ($image, $ChartCenterX, $ChartCenterY, $ChartDiameter, $ChartDiameter, $StartDegrees, $EndDegrees, $ CurrentColor);
Draw a line
List ($ArcX, $ArcY) = Circle_point ($StartDegrees, $ChartDiameter);
Imageline ($image, $ChartCenterX, $ChartCenterY, floor ($ChartCenterX + $ArcX),
Floor ($ChartCenterY + $ArcY), $CurrentColor);
Draw a line
List ($ArcX, $ArcY) = Circle_point ($EndDegrees, $ChartDiameter);
Imageline ($image, $ChartCenterX, $ChartCenterY, ceil ($ChartCenterX + $ArcX),
Ceil ($ChartCenterY + $ArcY), $CurrentColor);
Fill sector
$MidPoint = Round ((($EndDegrees – $StartDegrees)/2) + $StartDegrees);
List ($ArcX, $ArcY) = Circle_point ($MidPoint, $ChartDiameter/2);
Imagefilltoborder ($image, floor ($ChartCenterX + $ArcX), floor ($ChartCenterY + $ArcY),
$CurrentColor, $CurrentColor);
}
To this script has already had an image of, now need to send it to the browser, it is important to send the hair to the browser, let it know is a GIF file. Otherwise, you can only see a bunch of weird gibberish.
Header ("Content-type:image/png");
Imagegif ($image);
?>
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