Membuat Grafik Bar dengan PHP

Copy code berikit dan Simpan file ini dengan nama class.wchar.php

<?php
  /*
  W.Chart By Stieven R. Kalengkian
  All Right Reserved 
  Copyright (c) 2008
  Free for Personal use
  */
  class wchart {
  var $kanvas;
  var $kanvas_width_master   = 400;
  var $kanvas_height_master   = 300;
  var $kanvas_free = 50;
  var $max_data = 5000;
  var $kanvas_legend_height = 100;
  var $kanvas_legend_width = 100;
  var $string_head = "Wow!! Chart";
  var $space = 15;
 function wchart($w,$h,$f=50,$m=5000,$g=10) {
  $this->kanvas_width_master = $w;
  $this->kanvas_height_master = $h;
  if ($f < 40) { $f = 40; }
  $this->kanvas_free = $f;
  $this->max_data = $m;
  $this->grid = $g;
  }
  
  function set_title($t) {
  $this->string_head=$t;
  $string_foot="Generated ".date("M, d Y h:i:sa")." GCM Graph";
  imagestring($this->kanvas,2,($this->kanvas_width_master-(strlen($string_foot)*6))/2,$this->kanvas_height_master-15,$string_foot,$this->dgrey);
  imagestring($this->kanvas,5,($this->kanvas_width_master-(strlen($this->string_head)*9))/2,15,$this->string_head,$this->black);
  }
  
  function make_kanvas() { 
  $this->kanvas = imagecreatetruecolor($this->kanvas_width_master+$this->kanvas_legend_width,$this->kanvas_height_master+$this->kanvas_legend_height);
  
  $this->kanvas_height = $this->kanvas_height_master - ($this->kanvas_free*2);
  $this->kanvas_width = $this->kanvas_width_master - ($this->kanvas_free);
  $this->start_x = $this->kanvas_free;
  $this->end_x = $this->kanvas_width;
  $this->start_y = $this->kanvas_free;
  $this->end_y = $this->kanvas_height;
  
  $this->red=imagecolorallocate($this->kanvas,0xFF,0x00,0x00);
  $this->black=imagecolorallocate($this->kanvas,0x00,0x00,0x00);
  $this->green=imagecolorallocate($this->kanvas,0x00,0xFF,0x00);
  $this->white=imagecolorallocate($this->kanvas,0xFF,0xFF,0xFF);
  $this->blue=imagecolorallocate($this->kanvas,0x00,0x00,0xFF);
  $this->grey=imagecolorallocate($this->kanvas,0xF6,0xF6,0xF6);
  $this->dgrey=imagecolorallocate($this->kanvas,0xCF,0xCF,0xCF);
  imagefill($this->kanvas,0,0,$this->white);
  imagerectangle($this->kanvas,1,1,$this->kanvas_width_master-1+$this->kanvas_legend_width,$this->kanvas_height_master-1+$this->kanvas_legend_height,$this->black);
  }
  
  function make_grid($g = 10) {
  $dataPersen = $this->max_data/$g;
  $maxPersen = $dataPersen*$g;
  $gridScale = round(($this->kanvas_height)/$g);
  for ($i = 0; $i <= $g; $i++) {
  imageline($this->kanvas,$this->start_x,$gridScale*$i+$this->kanvas_free,$this->end_x,$gridScale*$i+$this->kanvas_free,$this->grey);
  }
  
  $gs = round(($this->kanvas_width-$this->kanvas_free)/$g);
  $gridV = round(($this->kanvas_width-$this->kanvas_free)/$gs);
  for ($i = 0; $i <= $gridV; $i++) {
  imageline($this->kanvas,$this->start_x+$i*$gs,$this->start_y,$this->start_x+$i*$gs,$this->end_y+$this->kanvas_free,$this->grey);
  }
  imageline($this->kanvas,$this->start_x,round(($this->kanvas_height)/2)+$this->kanvas_free,$this->end_x,round(($this->kanvas_height)/2)+$this->kanvas_free,$this->dgrey);
  imageline($this->kanvas,$this->start_x,$this->end_y+$this->kanvas_free,$this->end_x,$this->end_y+$this->kanvas_free,$this->black);
  imageline($this->kanvas,$this->start_x,$this->start_y,$this->start_x,$this->end_y+$this->kanvas_free,$this->black);
  for ($i = 0; $i <= $g; $i++) {
  imagestring($this->kanvas,2,$this->start_x-($this->start_x-10),$gridScale*$i-5+$this->kanvas_free,round($maxPersen-($dataPersen*$i),2),$this->black);
  }
  }
  
  function polygon($arr,$filled = 0) {
  if ($filled == 0 ) {
  imagepolygon($this->kanvas,$arr,round(count($arr)/2),$this->red);
  } else {
  imagefilledpolygon($this->kanvas,$arr,round(count($arr)/2),$this->red);
  }
  }
  
  function bar($data,$text,$t3d=0) {
  $color[0]=imagecolorallocate($this->kanvas,0x00,0xFF,0x00);
  $color[1]=imagecolorallocate($this->kanvas,0xFF,0x00,0x00);
  $color[2]=imagecolorallocate($this->kanvas,0x00,0x00,0xFF);
  $color[3]=imagecolorallocate($this->kanvas,0x99,0x00,0x00);
  $color[4]=imagecolorallocate($this->kanvas,0x99,0x00,0x99);
  $color[5]=imagecolorallocate($this->kanvas,0xFF,0x66,0x00);
  $color[6]=imagecolorallocate($this->kanvas,0x33,0x33,0x00);
  $color[7]=imagecolorallocate($this->kanvas,0xFF,0x66,0x00);
  $color[8]=imagecolorallocate($this->kanvas,0x00,0x66,0x00);
  $color[9]=imagecolorallocate($this->kanvas,0xFF,0x66,0xFF);
  $color[10]=imagecolorallocate($this->kanvas,0x33,0x33,0xcc);
  if ($t3d == 1) { $this->bar3d($data,$text); }
  $space=$this->space;
  $jarak=round(($this->end_x-$this->kanvas_free-(count($data)*10))/count($data));
  $c=0;
  for ($i=0;$i<count($data);$i++) {
  $titik=round($data[$i]/$this->max_data*($this->end_y))-($this->kanvas_free);
  $x1 = $this->start_x+$space+($i*$jarak);
  $x2 = $x1+$jarak-$space;
  $y1 = $this->end_y-$titik;
  $y2 = $this->end_y+($this->kanvas_free-1);
  $tt=$data[$i];
  $tl=round(strlen($text[$i])*6)/2;
  $xt=$x1;
  if ($c > count($color)) { $c=0; }
  imagefilledrectangle($this->kanvas,$x1,$y1,$x2,$y2,$color[$c]);
  $string="$tt";
  if ($this->text_persen == 1) { $string="$tt%"; }
  //imagestring($this->kanvas,2,$x1+5,$y1-$space-30,$tt,$this->black);
  imagestring($this->kanvas,2,$xt+5,$y1-15-$space,$string,$this->black);
  $ls=10; $sp=5;
  $ly=$this->kanvas_height_master+($i*($ls+$sp));
  imagefilledrectangle($this->kanvas,$this->start_x,$ly,$this->start_x+10,$ly+$ls,$color[$c]);
  imagestring($this->kanvas,2,$this->start_x+20,$ly-1,$text[$i],$this->black);
  $c++;
  }
  }
  
  function bar3d($data,$text) {
  $color[0][0]=imagecolorallocate($this->kanvas,0x00,0x99,0x00);
  $color[0][1]=imagecolorallocate($this->kanvas,0x00,0x33,0x00);
  $color[1][0]=imagecolorallocate($this->kanvas,0x99,0x00,0x00);
  $color[1][1]=imagecolorallocate($this->kanvas,0x33,0x00,0x00);
  $color[2][0]=imagecolorallocate($this->kanvas,0x00,0x00,0x99);
  $color[2][1]=imagecolorallocate($this->kanvas,0x00,0x00,0x33);
  $color[3][0]=imagecolorallocate($this->kanvas,0x66,0x00,0x00);
  $color[3][1]=imagecolorallocate($this->kanvas,0x11,0x00,0x00);
  $color[4][0]=imagecolorallocate($this->kanvas,0x66,0x00,0x66);
  $color[4][1]=imagecolorallocate($this->kanvas,0x11,0x00,0x11);
  $color[5][0]=imagecolorallocate($this->kanvas,0x99,0x33,0x00);
  $color[5][1]=imagecolorallocate($this->kanvas,0x66,0x00,0x00);
  $color[6][0]=imagecolorallocate($this->kanvas,0x21,0x21,0x00);
  $color[6][1]=imagecolorallocate($this->kanvas,0x10,0x10,0x00);
  $color[7][0]=imagecolorallocate($this->kanvas,0x99,0x33,0x00);
  $color[7][1]=imagecolorallocate($this->kanvas,0x66,0x00,0x00);
  $color[8][0]=imagecolorallocate($this->kanvas,0x00,0x33,0x00);
  $color[8][1]=imagecolorallocate($this->kanvas,0x00,0x11,0x00);
  $color[9][0]=imagecolorallocate($this->kanvas,0x99,0x33,0x99);
  $color[9][1]=imagecolorallocate($this->kanvas,0x33,0x11,0x33);
  $color[10][0]=imagecolorallocate($this->kanvas,0x33,0x33,0xFF);
  $color[10][1]=imagecolorallocate($this->kanvas,0x00,0x00,0xCC);
  $space=$this->space;
  $p=$space-2;
  $jarak=round(($this->end_x-$this->kanvas_free-(count($data)*10))/count($data));
  $c=0;
  for ($i=0;$i<count($data);$i++) {
  $titik=round($data[$i]/$this->max_data*($this->end_y))-($this->kanvas_free);
  $x1 = $this->start_x+$space+($i*$jarak);
  $x2 = $x1+$jarak-$space;
  $y1 = $this->end_y-$titik;
  $y2 = $this->end_y+($this->kanvas_free-1);
  $tt=$data[$i];
  $tl=round(strlen($text[$i])*6)/2;
  $xt=$x1;
  if ($c > count($color)) { $c=0; }
  
  $point=array($x1,$y1,$x2,$y1,$x2+$p,$y1-$p,$x1+$p,$y1-$p);
  $numpoint=round(count($point)/2);
  imagefilledpolygon($this->kanvas,$point,$numpoint,$color[$c][0]);
  $point=array($x2,$y1,$x2+$p,$y1-$p,$x2+$p,$y2-$p,$x2,$y2);
  $numpoint=round(count($point)/2);
  imagefilledpolygon($this->kanvas,$point,$numpoint,$color[$c][1]);
  $c++;
  }
  }
  
  function cstring($x,$y,$string,$f=2) {
  imagestring($this->kanvas,$f,$x,$y,$string,$this->black);
  }
  
  function draw() {
  header("Content-type: image/png");
  imagepng($this->kanvas);
  }
  }
?>

Gunakan kode berikut untuk menggunakan class.wchart.php, tapi ingat jangan lupa include file terlebih dulu

<?php
include "class.wchart.php";
$data=array(100,50,20,30,50);
$text=array("satu","dua","tiga","empat","lima");
$chart = new wchart(600,300,40,100);
$chart->make_kanvas();
$chart->make_grid(10);
$chart->set_title("My Chart Demo for Me");
$chart->bar($data,$text);
$chart->draw();
?>