Create a superb PHP Data pie chart _ PHP Tutorial

Create a cool PHP Data pie chart. Source code: + ---------------------- + | pie3dfun. PHP public function | + ------------------------ + define (ANGLE_STEP, 5); define the angle step functiondra when drawing an elliptical arc

Source code:

// + ------------------------ +

// | Pie3dfun. PHP // public function |

// + ------------------------ +

Define ("ANGLE_STEP", 5); // defines the angle step when an elliptical arc is drawn.

Function draw_getdarkcolor ($ img, $ clr) // Evaluate the dark color of $ clr

{

$ Rgb = imagecolorsforindex ($ img, $ clr );

Return array ($ rgb ["red"]/2, $ rgb ["green"]/2, $ rgb ["blue"]/2 );

}

Function draw_getexy ($ a, $ B, $ d) // calculates the coordinate of the point on the elliptic corresponding to the angle $ d.

{

$ D = deg 2rad ($ d );

Return array (round ($ a * Cos ($ d), round ($ B * Sin ($ d )));

}

Function draw_arc ($ img, $ ox, $ oy, $ a, $ B, $ sd, $ ed, $ clr) // elliptical arc function

{

$ N = ceil ($ ed-$ sd)/ANGLE_STEP );

$ D = $ sd;

List ($ x0, $ y0) = draw_getexy ($ a, $ B, $ d );

For ($ I = 0; $ I <$ n; $ I ++)

{

$ D = ($ d + ANGLE_STEP)> $ ed? $ Ed :( $ d + ANGLE_STEP );

List ($ x, $ y) = draw_getexy ($ a, $ B, $ d );

Imageline ($ img, $ x0 + $ ox, $ y0 + $ oy, $ x + $ ox, $ y + $ oy, $ clr );

$ X0 = $ x;

$ Y0 = $ y;

}

}

Function draw_sector ($ img, $ ox, $ oy, $ a, $ B, $ sd, $ ed, $ clr) // draw a fan

{

$ N = ceil ($ ed-$ sd)/ANGLE_STEP );

$ D = $ sd;

List ($ x0, $ y0) = draw_getexy ($ a, $ B, $ d );

Imageline ($ img, $ x0 + $ ox, $ y0 + $ oy, $ ox, $ oy, $ clr );

For ($ I = 0; $ I <$ n; $ I ++)

{

$ D = ($ d + ANGLE_STEP)> $ ed? $ Ed :( $ d + ANGLE_STEP );

List ($ x, $ y) = draw_getexy ($ a, $ B, $ d );

Imageline ($ img, $ x0 + $ ox, $ y0 + $ oy, $ x + $ ox, $ y + $ oy, $ clr );

$ X0 = $ x;

$ Y0 = $ y;

}

Imageline ($ img, $ x0 + $ ox, $ y0 + $ oy, $ ox, $ oy, $ clr );

List ($ x, $ y) = draw_getexy ($ a/2, $ B/2, ($ d + $ sd)/2 );

Imagefill ($ img, $ x + $ ox, $ y + $ oy, $ clr );

}

Certificate // + ------------------------ + // | pie3dfun. PHP // public function | // + ------------------------ + define ("ANGLE_STEP", 5); // defines the angle step function dra when an elliptical arc is drawn...