此程序实现php画柱状图
//它的设计思想是：首先以用imagecreate（）来生成一个空白图形；其程序实现如下：
//需要两种不同的颜色，正数一个 负数一个 ，一个数据数组,$path为保存图片的地址
$data = array ("-1174.58","-1865.41","1961.24","-1174.58","-1865.41","1961.24","-1174.58","-1865.41","1961.24","-1174.58","-1865.41","1961.24","-1174.58","-1865.41","1961.24","-1174.58","-1865.41","1961.24","-1174.58","-1865.41","1961.24","-1174.58","-1865.41","1961.24","-1174.58","-1865.41","1961.24","-1174.58","-1865.41","1961.24");
$colors = array (array (255,0,0 ),array (0,255,0 ) );
$path = "gg15_600050.gif";
$title = "中国联通(600050)30日资金进出";
$date = array ("2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00","2010-05-20 00:00:00");
$hai = array(7203,6037,1931,9605,7405,8855,228,7771,8671,8791,1290,426,3265,4298,4809,3350,8204,8682,5523,7569,5853,593,3124,9062,3329,3236,2252,8756,2796,5164,2599,2630,1470,9779,8805,1512,1517,5635,760,1380,152,6035,2905,3163,9443,9432,5031,2838,6802,9330,1878,1333,4297,4180,3037,4527,9043,7287,3248,3448,3405,7204,2203,3974,4399,7333,4541,7033,4292,6128,9955,8603,297,6992,3282,9612,4483,8379,4016,6038,4163,3789,6896,8710,1502,1579,1712,3705,3619,5150,3007,1853,2776,3056,569,9031,6092,8600,8941,6366,5829,433,8011,9637,9106,1761,2422,9873,8186,1136,1763,3050,285,1962,775,9900,7371,2691,9051,6596,6858,6726,1527,3970,910,2621,7598,7899,6546,3678,2202,9411,6129,8352,4830,4484,6776,243,323,3946,751,7508,8173,3776,5071,3847,3318,4901,2102,7516,5251,3299,8859,2114,8711,9800,7707,5898,3489,580,5763,2470,4126,6269,5191,182,412,3043,3208,2438,6889,1732,1979,7692,3445,8214,8620,9446,4624,3615,5496,6152,213,3715,9623,1215,4757,9443,3366,2988,8043,6874,3742,4974,4812,6839,3016,5625,4656,5315,8303,8346,2315,3230,1969,1688,7381,6463,1030,8856,4691,6042,7652,8502,3839,7844,9149,4029,9465,2897,7688,3791,1458,6981,484,1290,4261,1222,9503,4881,7663,1399,2260,8066,6405,8442,722,9297,177,8426,2103,2078,3521,2280,8570,4663,6227,5784,7438,654,3036,9965,872,8306,3537,899,5888,1319,2472,9218,4853,7849,9433,1196,4880,1597,9258,7465,8138,817,1637,4201,1939,8914,1114,2232,8251,4538,7378,7438,4489,993,5269,944,2718,6633,4378,8431,155,5061,9347,1125,8865,4629,9965,4706,6263,8742,971,301);
draw(600,300,$data,$colors,$path,$title,$date);
function draw($w,$h,$data,$colors,$path,$title,$date)
{
//创建新空白图形
//箭头50像素，内容400*300
$width = $w;
$height = $h;
//取得左下角的坐标点，左边50像素和最下边50像素用于写标尺
$l_b_x = 50;
$l_b_y = $height/2;
$chartfont = 2; //图表字体
$font = 'c:/windows/fonts/simsun.ttc';//支持汉字的字体
$chartfontheight = imagefontheight($chartfont);//图表字体的大小
//取得最大的数据
$max = abs(max($data));
$max = $max>abs(min($data))?$max:abs(min($data));
$image = imagecreate($width,$height);
//填充背景为白色
$color_white = imagecolorallocate($image, 0xff, 0xff, 0xff);//白色
$color_diwen = imagecolorallocate($image,0xd8,0xd8,0xd8);//暗灰色
imagefill($image,0,0,$color_white);
//写入logo
imagettftext($image,20,0,$l_b_x+20,45,$color_diwen,$font,'华南财经网');
//画坐标
//坐标颜色为黑色,先画坐标，再画箭头
$black_color = imagecolorallocate($image,0x00,0x00,0x00);
imageline($image,$l_b_x,$l_b_y,$l_b_x,10,$black_color);
imageline($image,$l_b_x,$l_b_y,$width-10,$l_b_y,$black_color);
//箭头
imageline($image,$l_b_x,10,$l_b_x-3,14,$black_color);
imageline($image,$l_b_x,10,$l_b_x+3,14,$black_color);
imageline($image,$width-10,$l_b_y,$width-13,$l_b_y-3,$black_color);
imageline($image,$width-10,$l_b_y,$width-13,$l_b_y+3,$black_color);
//画底纹,灰色;画20条底纹；虚线
$pit = floor(($l_b_y-50)/10);//每一段的高度
$pit_x = floor(($width-$l_b_x-30)/count($data));//每一段的宽度
//计算单位
$x_max = $max;
$flag_danwei = 0;
while($x_max> 1000 )
{
$x_max /= 100;
$flag_danwei++;
}
switch($flag_danwei)
{
// case 0:$danwei = '（元）';break;
case 0:$danwei = '（万）';break;
case 1:$danwei = '（百万）';break;
case 2:$danwei = '（亿）';break;
case 3:$danwei = '（百亿）';break;
}
for($i=1;$i<11;$i++)
{
imageline($image,$l_b_x+1,$l_b_y-$i*$pit,$width-15,$l_b_y-$i*$pit,$color_diwen);
//从坐标的值
$v_v = number_format(($max/(10*pow(100,$flag_danwei))*$i),2);
$v_v = substr($v_v,0,5);
imagestring($image,
$chartfont,
$l_b_x-40,
$l_b_y-$i*$pit-10,
$v_v,
$black_color);
}
//原点坐标
imagestring($image,
$chartfont,
$l_b_x-20,
$l_b_y-10,
0,
$black_color);
//写入汉字,单位 和标题
imagettftext($image, 10,0,$l_b_x-45,20,$black_color,$font,$danwei);
//imagettftext($image, 11,0,$width/2-70,$l_b_y+20,$black_color, $font,$title);
//画柱体，长方形，并着色
$color_big = imagecolorallocate($image,$colors[0][0],$colors[0][1],$colors[0][2]);
$color_small = imagecolorallocate($image,$colors[1][0],$colors[1][1],$colors[1][2]);
for($j=0;$j
{
$d_h = floor(abs($data[$j]/$max*10*$pit));//柱体高度
$current_date = substr($date[$j],5,5);
// $current_date .= substr($date[$j],8,2);
imagerectangle($image,
$l_b_x+$j*$pit_x+1,
$l_b_y,
$l_b_x+($j+1)*$pit_x-2,
$l_b_y-$d_h,
$black_color);
//为矩形着色
$current_color = $data[$j]>0?$color_big:$color_small;
imagefilltoborder($image,
$l_b_x+$j*$pit_x+1 + floor($pit_x/2),
$l_b_y-floor($d_h/2),
$black_color,
$current_color);
//写入日期
/*imagestring($image,
$chartfont,
$l_b_x+$j*$pit_x,
$l_b_y+2,
$current_date,
$black_color);*/
imagettftext($image,8,90,$l_b_x+$j*$pit_x+10,$l_b_y-$d_h,$black_color,$font,$current_date);
}
if($path !="")
imagegif($image,$path);
else imagegif($image);
imagedestroy($image);
}//画图函数结束
//输出生成的图片
/*
header("content-type: image/gif");
$my_colors[] = array(0xff,0x00,0x00);
$my_colors[] = array(0x00,0xff,0x00);
draw(600,400,array(1066565650,-40345340,50343433440,1834340,50343230,-8023454230,600,7232323300,-836),$my_colors,0,'教科书大阿斯顿即可');*/
//draw(600,400,array(1066,-4040,5040,1840,5030,-8230,600,7232,-836),$my_colors,0,'教科书大阿斯顿即可');
?>
