Cirkeldiagram

[code]
<?php
//--- Colours
//--- Function to switch html to rgb
function html2rgb( $color = '000000' )
{
	// Gevonden via Google, deze is dus NIET van mij.
	if ($color[0] == '#')
	{
		$color = substr($color, 1);
	}
	
	$length = strlen( $color );
	if ( $length == 6 )
	{
		list($r, $g, $b) = array(
			$color[0].$color[1],
			$color[2].$color[3],
			$color[4].$color[5]);
	}
	elseif ( $length == 3 )
	{
		list($r, $g, $b) = array($color[0].$color[0], $color[1].$color[1], $color[2].$color[2]);
	}
    else
	{
		return false;
	}

    $r = hexdec( $r );
	$g = hexdec( $g );
	$b = hexdec($b);
	
    return array($r, $g, $b);
}

$colors = array(
	'FFFAFA',
	'F8F8FF',
	'F5F5F5',
	'DCDCDC',
	'FFFAF0',
	'FDF5E6',
	'FAF0E6',
	'FAEBD7',
	'FFEFD5',
	'FFEBCD',
	'FFE4C4',
	'FFDAB9',
	'FFDEAD',
	'FFE4B5',
	'FFF8DC',
	'FFFFF0',
	'FFFACD',
	'FFF5EE',
	'F0FFF0',
	'F5FFFA',
	'F0FFFF',
	'F0F8FF',
	'E6E6FA',
	'FFF0F5',
	'FFE4E1',
	'000000',
	'2F4F4F',
	'696969',
	'708090',
	'778899',
	'BEBEBE',
	'D3D3D3',
	'191970',
	'000080',
	'6495ED',
	'483D8B',
	'6A5ACD',
	'7B68EE',
	'8470FF',
	'0000CD',
	'4169E1',
	'0000FF',
	'1E90FF',
	'00BFFF',
	'87CEEB',
	'4682B4',
	'B0C4DE',
	'ADD8E6',
	'B0E0E6',
	'AFEEEE',
	'00CED1',
	'48D1CC',
	'40E0D0',
	'00FFFF',
	'E0FFFF',
	'5F9EA0',
	'66CDAA',
	'7FFFD4',
	'006400',
	'556B2F',
	'8FBC8F',
);
/* Meer kleuren? http://catless.ncl.ac.uk/Lindsay/swatch1.html (Swatch 1 tot 8)
-------------------------------------------------------------------------------------------- */

//--- Uniek!
$colors = array_unique( $colors );

function getRandomcolor()
{
	global $used_colours, $img, $colors;
	
	$rand = rand(0, ( count( $colors ) - 1 ) );
	$color = $colors[$rand];
	
	if ( in_array( $rand, $used_colours ) )
	{
		return getRandomcolor();
	}
	else
	{
		$used_colours[] .= $rand;
	}
	
	list( $r, $g, $b ) = html2rgb( $color );
	return imagecolorallocate( $img, $r, $g, $b );
}

function h2r( $color = '000000')
{
	return html2rgb( $color );
}

//--- Get stats to fix circle diagram with
if ( $_GET['stats'] == '' && $_GET['stats'] == NULL )
{
	exit( 'Sorry, geen opties gevonden! (Geef deze zo op: "' . $_SERVER['PHP_SELF'] . '?stats=Peren-500;Appels-300;Bananen-200&side=300")' );
}
else
{
	$explode = explode(';', $_GET['stats'] );
	if ( is_array( $explode ) )
	{
		$input_stats = array();
		foreach( $explode as $value )
		{
			list( $key, $val ) = explode('-', $value );
			$input_stats[$key] = $val;
		}
		$options = @count( $input_stats );
		if ( $options < 1 )
		{
			exit( 'Sorry, geen opties gevonden! (Geef deze zo op: "' . $_SERVER['PHP_SELF'] . '?stats=Peren-500;Appels-300;Bananen-200&side=300")' );
		}
	}
	else
	{
		exit( 'Sorry, geen opties gevonden! (Geef deze zo op: "' . $_SERVER['PHP_SELF'] . '?stats=Peren-500;Appels-300;Bananen-200&side=300")' );
	}
}

foreach( $input_stats as $key => $value )
{
	if ( ( $key == '' && $key == NULL ) OR ( $value == '' && $value == NULL ) )
	{
		exit( 'Sorry, geen opties gevonden! (Geef deze zo op: "' . $_SERVER['PHP_SELF'] . '?stats=Peren-500;Appels-300;Bananen-200")' );
	}
	
	if ( !is_numeric( $value ) )
	{
		exit( 'Het aantal moet een nummer zijn (Was ' . $value . ')' );
	}
}
$side = ( $_GET['side'] != '' && $_GET['side'] != NULL && is_numeric( $_GET['side'] ) && $_GET['side'] > 0 && $_GET['side'] < 400 ) ? $_GET['side'] : 200;
$height = $side + ( $options * 25 );

$width = ( $side < 300 ) ? 300 : $side;

//--- Create image stream
$img = @imagecreate( $width, $height ) or exit( 'Failed creating image' );

//--- Background color (white)
list( $r, $g, $b ) = h2r( 'FFFFFF' );
$background_color = imagecolorallocate($img, $r, $g, $b );

$stats = array();

$totaal = 0;
foreach( $input_stats as $value )
{
	$totaal = $totaal + $value;
}

$id = 0;
foreach( $input_stats as $name => $stat )
{
	$procent = $stat / $totaal * 100;
	$start = 0 + $eind;
	$eind = 0 + $start + ( $procent * 3.6 );
	$stats[$id] = array(
		'object_naam'	=> $name,
		'aantal'		=> $stat,
		'procenten'		=> $procent,
		'start'			=> $start,
		'eind'			=> $eind,
	);
	$id++;
}

//--- Create blocks
$zwart = imagecolorallocate($img, 0, 0, 0);
$arc = imagefilledarc($img, ( $side / 2 ), ( $side / 2 ), $side - 15, $side - 15, 0, 360, $zwart, IMG_ARC_PIE );
$i = 0;
$font = './Verdana.ttf';
$used_colours = array();
foreach( $stats as $name => $stat )
{
	$colour = getRandomcolor();
	$arc = imagefilledarc($img, ( $side / 2 ), ( $side / 2 ), $side - 15, $side - 15, $stat['start'], $stat['eind'], $colour, IMG_ARC_PIE );
	// Give the information below the diagramm
	$x_top = $side + ( $i * 20 );
	imagefilledrectangle($img, 40, $x_top, 50, $x_top + 10, $colour );
	imagettftext($img, 10, 0, 60, $x_top + 10, imagecolorallocate($img, 0, 0, 0), $font, $stat['aantal'] . ' ' .$stat['object_naam'] );
	$i++;
	if ( count( array_unique( array_merge( $used_colours, $colors ) ) ) == count( $colors ) )
	{
		//--- Alle kleuren gebruikt, nieuwe loop
		$used_colours = array();
	}
}

//--- Create image
header( 'Content-type: image/png' );
imagepng( $img );
imagedestroy( $img );
?>
[/code]