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| Code | |||||
<?php // a simple pie-chart in php3 (with gd) // (c)2000 knik@crosswinds.net // // usage: pie.php3?label=value&label=value&label=value&... // ex.: pie.php3?label1=10&label2=15&label3=20 // // code can be freely copied & modified Header("Content-type: image/gif"); //init and create image: $img_width = 320; $img_height = 192; $id = ImageCreate($img_width,$img_height); $hcenter = ImageSX($id)/2; $vcenter = ImageSY($id)/2; //diameter: $d = 160; //define colors: //there are 9 pie colors, same as in Excel $black = ImageColorAllocate($id, 0, 0, 0); $white = ImageColorAllocate($id, 255, 255, 255); $pie_color[1] = ImageColorAllocate($id, 144, 151, 255); $pie_color[2] = ImageColorAllocate($id, 144, 48, 96); $pie_color[3] = ImageColorAllocate($id, 255, 255, 192); $pie_color[4] = ImageColorAllocate($id, 207, 255, 255); $pie_color[5] = ImageColorAllocate($id, 95, 0, 95); $pie_color[6] = ImageColorAllocate($id, 255, 127, 127); $pie_color[7] = ImageColorAllocate($id, 207, 255, 255); $pie_color[8] = ImageColorAllocate($id, 0, 96, 192); $pie_color[9] = ImageColorAllocate($id, 207, 200, 255); //the white background will be transparent: ImageFill($id, 0, 0, $white); ImageColorTransparent($id, $white); if (empty($argv)) { //if no agruments are given than show the empty chart: ImageArc($id, $hcenter, $vcenter, $d, $d, 0, 360, $black); $idf = 3; $hfw = ImageFontWidth($idf); $vfw = ImageFontHeight($idf); $string = "no args!"; $hpos = $hcenter - $hfw*strlen($string)/2; $vpos = $vcenter - $vfw/2; ImageString($id, $idf, $hpos, $vpos, $string, $black); $string = "ex.: pie.php3?label1=10&label2=15&label3=20"; $hpos = $hcenter - $hfw*strlen($string)/2; $vpos = ImageSY($id) - $vfw; ImageString($id, $idf, $hpos, $vpos, $string, $black); } else { $total = 0; $n = 0; //read the arguments into different arrays: while (list($key, $val) = each($HTTP_GET_VARS)) { $n++; $label[$n] = $key; $value[$n] = $val; $total += $val; $arc_rad[$n] = $total*2*pi(void); $arc_dec[$n] = $total*360; } //the base: $arc_rad[0] = 0; $arc_dec[0] = 0; //count the labels: for ($i = 1; $i <= $n; $i++) { $idf = 1; $hfw = ImageFontWidth($idf); $vfw = ImageFontHeight($idf); //calculate the percents: $perc[$i] = $value[$i]/$total; $percstr[$i] = (string) number_format($perc[$i]*100,1)."%"; //label with percentage: $label[$i] = $label[$i]." (".$percstr[$i].")"; //calculate the arc and line positions: $arc_rad[$i] = $arc_rad[$i]/$total; $arc_dec[$i] = $arc_dec[$i]/$total; $hpos = Round($hcenter + ($d/2)*Sin($arc_rad[$i])); $vpos = Round($vcenter + ($d/2)*Cos($arc_rad[$i])); ImageLine($id, $hcenter, $vcenter, $hpos, $vpos, $black); ImageArc($id, $hcenter, $vcenter, $d, $d, $arc_dec[$i-1], $arc_dec[$i], $black); //calculate the positions for the labels: $arc_rad_label = $arc_rad[$i-1] + 0.5*$perc[$i]*2*pi(void); $hpos = $hcenter + 1.1*($d/2)*Sin($arc_rad_label); $vpos = $vcenter + 1.1*($d/2)*Cos($arc_rad_label); if (($arc_rad_label > 0.5*pi(void)) && ($arc_rad_label < 1.5*pi(void))) { $vpos = $vpos - $vfw; } if ($arc_rad_label > pi(void)) { $hpos = $hpos - $hfw*strlen($label[$i]); } //display the labels: ImageString($id, $idf, $hpos, $vpos, $label[$i], $black); } //fill the parts with their colors: for ($i = 1; $i <= $n; $i++) { $arc_rad_label = $arc_rad[$i-1] + 0.5*$perc[$i]*2*pi(void); $hpos = $hcenter + 0.8*($d/2)*Sin($arc_rad_label); $vpos = $vcenter + 0.8*($d/2)*Cos($arc_rad_label); ImageFillToBorder($id, $hpos, $vpos, $black, $pie_color[$i]); } } //and finally: ImageGif($id); ImageDestroy($id); ?> | |||||
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