一个生成矩形图，曲线图的图形分析类(需要GD库支持)

<?php
//一个生成矩形图，曲线图的图形分析类
//说明：
//任何人可在任何场合自由使用这个类。但由此所发生的损害跟作者无关。
//可根据数据自适应X和Y轴大小。
//在同一个图形中可显示多个曲线图
//用户可给出生成的图的尺寸大小，数据参数。类根据数据的值来判断生成的图形的高（默认10格）和宽各分几格。
//若用户没有给出图的尺寸大小，则图形高和宽为255像素
//数据参数通过一个方法add_data($array)来多次添加，每次一个数组。
//可自设定图形边框，矩形图内线，深色边框线，浅色边框线，曲线，点的颜色。若用户没有指定，则为默认值
//set_colors方法设定不同曲线的不同色彩
//可进行图形的叠加显示:点，线，矩形
//注意：需要GD库支持

//使用示例
$gg=new build_graph();
$d1=array(0,62,25,20,20,100,99);
$d2=array(0,80,75,65,100,56,79);
$d3=array(0,60,50,25,12,56,45);
$gg->add_data($d1);
$gg->add_data($d2);
$gg->add_data($d3);
$gg->set_colors("ee00ff,dd8800,00ff00");
//生成曲线图
$gg->build("line",0);          //参数0表示显示所有曲线，1为显示第一条，依次类推
//生成矩形图
//$gg->build("rectangle","2");    //参数0表示显示第一个矩形，1也为显示第一条，其余依次类推

class build_graph {
var $graphwidth = 300;
var $graphheight = 300;
var $width_num = 0;                //宽分多少等分
var $height_num = 10;                //高分多少等分，默认为10
var $height_var = 0;                //高度增量（用户数据平均数）
var $width_var=0;                //宽度增量（用户数据平均数）
var $height_max=0;                //最大数据值
var $array_data=array();          //用户待分析的数据的二维数组
var $array_error=array();          //收集错误信息

var $colorBg=array(255,255,255);    //图形背景-白色
var $colorGrey=array(192,192,192);    //灰色画框
var $colorBlue=array(0,0,255);       //蓝色
var $colorRed=array(255,0,0);       //红色（点）
var $colorDarkBlue=array(0,0,255);    //深色
var $colorLightBlue=array(200,200,255);       //浅色
var $colorLightBlack = array(138,138,120); //浅黑
var $colorBlack = array(30,30,30); //黑
var $rgbArray = array("ee00ff","dd8800","00ff00","104E8B");

var $array_color;                //曲线着色（存储十六进制数）
var $image;                      //我们的图像
var $lineType = ''; //画底线时标的数字值，则x的值,范围为'day', 'hour'两值
var $beginDay = '';

//方法：接受用户数据
function add_data($array_user_data, $dataKey = 0){
if(!is_array($array_user_data)){
$array_user_data = array();
}
if(!is_array($array_user_data) or empty($array_user_data)){
$this->array_error['add_data']="没有可供分析的数据";
return false;
exit();
}
if($dataKey == 0 || array_key_exists($dataKey, $this->array_data)){
$dataKey = count($this->array_data);
}
$this->array_data[$dataKey] = $array_user_data;
}

//方法：定义画布宽和长
function set_img($img_width,$img_height){
$this->graphwidth = $img_width;
$this->graphheight = $img_height;
}

//设定Y轴的增量等分，默认为10份
function set_height_num($var_y){
$this->height_num=$var_y;
}

//定义各图形各部分色彩
function get_RGB($color){             //得到十进制色彩
$R=($color>>16) & 0xff;
$G=($color>>8) & 0xff;
$B=($color) & 0xff;
return (array($R,$G,$B));
}
//---------------------------------------------------------------
#定义背景色
function set_color_bg($c1,$c2,$c3){
$this->colorBg=array($c1,$c2,$c3);
}
#定义画框色
function set_color_Grey($c1,$c2,$c3){
$this->colorGrey=array($c1,$c2,$c3);
}
#定义蓝色
function set_color_Blue($c1,$c2,$c3){
$this->colorBlue=array($c1,$c2,$c3);
}
#定义色Red
function set_color_Red($c1,$c2,$c3){
$this->colorRed=array($c1,$c2,$c3);
}
#定义深色
function set_color_DarkBlue($c1,$c2,$c3){
$this->colorDarkBlue=array($c1,$c2,$c3);
}
#定义浅色
function set_color_LightBlue($c1,$c2,$c3){
$this->colorLightBlue=array($c1,$c2,$c3);
}

//设定画底线时标的数字值，则x的值,范围为'day', 'hour'两值
function  setLineStrinType($type){
if(!in_array($type, array('day', 'hour'))){
return false;
}
$this->lineType = $type;
}

//---------------------------------------------------------------

//方法:由用户数据将画布分成若干等份宽
//并计算出每份多少像素
function get_width_num(){
$dataCount = array();
foreach ($this->array_data as $key => $oneData){
$dataCount[] = count($oneData);
}

$this->width_num = max($dataCount);
}
function get_max_height(){
//获得用户数据的最大值
$tmpvar = array();
foreach($this->array_data as $tmp_value){
$tmpvar[]= max($tmp_value);
}
if(isset($tmpvar[0])){
$more = $tmpvar[0];
}
$this->height_max = max($tmpvar) + $this->height_var;
return max($tmpvar);
}
function get_height_length(){
//计算出每格的增量长度(用户数据，而不是图形的像素值)
$max_var = $this->get_max_height();
$max_var = round($max_var/$this->height_num);
$first_num = substr($max_var,0,1);
if(substr($max_var,1,1)){
if(substr($max_var,1,1)>=5)
$first_num += 1;
}
for($i = 1; $i < strlen($max_var); $i++){
$first_num .= "0";
}
return (int)$first_num;
}
function get_var_wh(){          //得到高和宽的增量
$this->get_width_num();
//得到高度增量和宽度增量
$this->height_var = $this->get_height_length();
$this->width_var = round($this->graphwidth/$this->width_num, 3);
}

function set_colors($str_colors){
//用于多条曲线的不同着色，如$str_colors="ee00ff,dd0000,cccccc"
$this->array_color = split(",",$str_colors);
}

function set_begin_day($beginDay){
if(!is_numeric($beginDay)){
return false;
}
$this->beginDay = $beginDay;
}

######################################################################################################
function build_line($var_num){
if(!empty($var_num)){                   //如果用户只选择显示一条曲线
$array_tmp[0] = $this->array_data[$var_num-1];
$this->array_data = $array_tmp;
}

for($j=0;$j<count($this->array_data);$j++){
list($R,$G,$B)=$this->get_RGB(hexdec($this->array_color[$j]));
$colorBlue=imagecolorallocate($this->image,$R,$G,$B);

for($i = 0;$i < $this->width_num - 1;$i++){
$height_pix = round(($this->array_data[$j][$i]/$this->height_max)*$this->graphheight);
$height_next_pix = round($this->array_data[$j][$i + 1]/$this->height_max*$this->graphheight);
imageline($this->image,$this->width_var*($i + 1),$this->graphheight-$height_pix,$this->width_var*($i + 2),$this->graphheight-$height_next_pix,$colorBlue);
}
}
//画点
$colorRed = imagecolorallocate($this->image, $this->colorBlue[0], $this->colorBlue[1], $this->colorBlue[2]);

for($j = 0; $j < count($this->array_data); $j++){
list($R,$G,$B) = $this->get_RGB(hexdec($this->array_color[$j]));
$colorPoint = imagecolorallocate($this->image,$R,$G,$B);

for($i = 0; $i < $this->width_num; $i++){
if(isset($this->array_data[$j][$i])){
$height_pix = round(($this->array_data[$j][$i]/$this->height_max)*$this->graphheight);
$arcRet = imagearc($this->image,$this->width_var*($i + 1),$this->graphheight-$height_pix,6,5,0,360,$colorPoint);
$borderRet = imagefilltoborder($this->image,$this->width_var*($i + 1),$this->graphheight-$height_pix,$colorPoint,$colorPoint);
if(!$arcRet || !$borderRet){
break;
}
}
}
}

for($j = 0; $j < count($this->array_data); $j++){
list($R,$G,$B) = $this->get_RGB(hexdec($this->array_color[$j]));
$colorPoint = imagecolorallocate($this->image,$R,$G,$B);
for($i = 0; $i < $this->width_num; $i++){
$height_pix = round(($this->array_data[$j][$i]/$this->height_max) * $this->graphheight);
$arcRet = imagearc($this->image,$this->width_var*($i + 1),$this->graphheight-$height_pix,6,5,0,360,$colorPoint);
$arcRet = imagefilltoborder($this->image,$this->width_var*($i + 1),$this->graphheight-$height_pix,$colorPoint,$colorPoint);
if(!$arcRet || !$borderRet){
break;
}
}
}

}

######################################################################################################
function build_rectangle($select_gra){
if(!empty($select_gra)){                   //用户选择显示一个矩形
$select_gra-=1;
}
//画矩形
//配色
$colorDarkBlue=imagecolorallocate($this->image, $this->colorDarkBlue[0], $this->colorDarkBlue[1], $this->colorDarkBlue[2]);
$colorLightBlue=imagecolorallocate($this->image, $this->colorLightBlue[0], $this->colorLightBlue[1], $this->colorLightBlue[2]);

if(empty($select_gra))
$select_gra=0;
for($i=0; $i<$this->width_num; $i++){
$height_pix=round(($this->array_data[$select_gra][$i]/$this->height_max)*$this->graphheight);
imagefilledrectangle($this->image,$this->width_var*$i,$this->graphheight-$height_pix,$this->width_var*($i+1),$this->graphheight, $colorDarkBlue);
imagefilledrectangle($this->image,($i*$this->width_var)+1,($this->graphheight-$height_pix)+1,$this->width_var*($i+1)-5,$this->graphheight-2, $colorLightBlue);
}
}

######################################################################################################
function create_cloths(){
//创建画布
$this->image = imagecreate($this->graphwidth+20,$this->graphheight+20);
}
function create_frame(){
//创建画框
$this->get_var_wh();
//配色
$colorBg=imagecolorallocate($this->image, $this->colorBg[0], $this->colorBg[1], $this->colorBg[2]);
$colorGrey=imagecolorallocate($this->image, $this->colorGrey[0], $this->colorGrey[1], $this->colorGrey[2]);
//创建图像周围的框
imageline($this->image, 0, 0, 0, $this->graphheight,$colorGrey);
imageline($this->image, 0, 0, $this->graphwidth, 0,$colorGrey);
//imageline($this->image, ($this->graphwidth-1),0,($this->graphwidth-1),($this->graphheight-1),$colorGrey);
imageline($this->image, 0,($this->graphheight-1),($this->graphwidth-1),($this->graphheight-1),$colorGrey);
}
function create_line(){
//创建网格。
$this->get_var_wh();
$colorBg = imagecolorallocate($this->image, $this->colorBg[0], $this->colorBg[1], $this->colorBg[2]);
$colorGrey = imagecolorallocate($this->image, $this->colorGrey[0], $this->colorGrey[1], $this->colorGrey[2]);
$colorRed = imagecolorallocate($this->image, $this->colorRed[0], $this->colorRed[1], $this->colorRed[2]);
$colorLightBlack = imagecolorallocate($this->image, $this->colorLightBlack[0], $this->colorLightBlack[1], $this->colorLightBlack[2]);
$colorBlack = imagecolorallocate($this->image, $this->colorBlack[0], $this->colorBlack[1], $this->colorBlack[2]);
for($i = 1 ;$i <= $this->height_num + 5; $i++){
//画横线
imageline($this->image,0,$this->graphheight-($this->height_var/$this->height_max*$this->graphheight)*$i,$this->graphwidth,$this->graphheight-($this->height_var/$this->height_max*$this->graphheight)*$i,$colorGrey);
//标出数字
imagestring($this->image,2,0,$this->graphheight-($this->height_var/$this->height_max*$this->graphheight)*$i,$this->height_var*$i,$colorLightBlack);
}
$type = $this->lineType;
if($type == "day"){
if($this->beginDay){
$j = $this->beginDay;
}else{
$j = 1;
}
}elseif($type == "hour"){
$j = 0;
}
for($i = 1;$i <= $this->width_num; $i++){
//画竖线
imageline($this->image,$this->width_var*$i,0,$this->width_var*$i,$this->graphwidth,$colorGrey);
//标出数字
if($type == 'day'){
if($i == 1){
imagestring($this->image,2,$this->width_var*$i,$this->graphheight-15,$j,$colorBlack);
}
imagestring($this->image,2,$this->width_var*($i + 1),$this->graphheight-15,$j + 1,$colorBlack);
}elseif($type == 'hour'){
if($i == 1){
imagestring($this->image,2,$this->width_var*$i,$this->graphheight-15,$j,$colorBlack);
}
imagestring($this->image,2,$this->width_var*($i + 1),$this->graphheight-15,$j + 1,$colorBlack);
}else{
imagestring($this->image,2,$this->width_var*($i + 1),$this->graphheight-15,$i,$colorBlack);
}
$j++;
if($type == "day" && $j == 31){
$j = 1;
}elseif($type == "hour" && $j == 23){
$j = -1;
}
}
}

function build($graph,$str_var, $outpwd = ""){
//$graph是用户指定的图形种类,$str_var是生成哪个数据的图
if(empty($outpwd)){
header("Content-type: image/jpeg");
}
$this->create_cloths();          //先要有画布啊~~
switch ($graph){
case "line":
$this->create_frame();          //画个框先：）
$this->create_line();          //打上底格线
$this->build_line($str_var);          //画曲线
break;
case "rectangle":
$this->create_frame();                   //画个框先：）
$this->build_rectangle($str_var);          //画矩形
$this->create_line();                   //打上底格线
break;
}
//输出图形并清除内存
if(!empty($outpwd)){
imagepng($this->image, $outpwd);
}else{
imagepng($this->image);
}
imagedestroy($this->image);
}

}