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Version 4.10 (released Jan. 7, 2012) [Download]

Vertical Bar-Graphs

Have a look at the following examples to see how you can create your own graphs:
Example #1
The most simple graph looks like this:
$graph = new BAR_GRAPH("vBar");
$graph->values = "380,150,260,310,430";
echo $graph->create();
25%
10%
17%
20%
28%
 1  2  3  4  5 
Example #2
Now let's add some labels and titles:
$graph = new BAR_GRAPH("vBar");
$graph->values = "380,150,260,310,430";
$graph->labels = "Jan.,Feb.,Mar.,Apr.,May";
$graph->titles = "Month,Sales";
echo $graph->create();
Sales
25%
10%
17%
20%
28%
Month Jan.  Feb.  Mar.  Apr.  May 
Example #3
It's also possible to create grouped bar-graphs for comparison.
Separate grouped values by a semicolon and add a legend:
$graph = new BAR_GRAPH("vBar");
$graph->labels = "Jan.,Feb.,Mar.,Apr.,May";
$graph->titles = "Month,Sales";
$graph->values = "380;420, 150;340, 260;120, 310;250, 430;370";
$graph->legend = "2001,2002";
echo $graph->create();
Sales
13%
14%
5%
11%
9%
4%
10%
8%
14%
12%
Month Jan.  Feb.  Mar.  Apr.  May 
 
2001
2002

If you want to use an array for the values, here's an example:
$graph->values = array("380;420", "150;340", "260;120");
Example #4
Let's change some colors and show the values:
$graph = new BAR_GRAPH("vBar");
$graph->labels = "Jan.,Feb.,Mar.,Apr.,May";
$graph->titles = "Month,Sales,Per-cent";
$graph->values = "380;420, 150;340, 260;120, 310;250, 430;370";
$graph->legend = "2001,2002";
$graph->graphBGColor = "#B0E0B0";
$graph->graphBorder = "1px solid green";
$graph->graphPadding = 10;
$graph->titleColor = "yellow";
$graph->titleBGColor = "#60C060";
$graph->barColors = "#C0D0C0,#80D080";
$graph->barBGColor = "#D0F0D0";
$graph->labelColor = "yellow";
$graph->labelBGColor = "#60C060";
$graph->absValuesColor = "#008000";
$graph->absValuesBGColor = "#D0F0D0";
$graph->percValuesColor = "#008000";
$graph->legendColor = "#008000";
$graph->legendBGColor = "#D0F0D0";
$graph->legendAbsValues = true;
$graph->showValues = 1;
echo $graph->create();
Per-
cent
13%
14%
5%
11%
9%
4%
10%
8%
14%
12%
Sales 380  420  150  340  260  120  310  250  430  370 
Month Jan.  Feb.  Mar.  Apr.  May 
 
2001(1530)
2002(1500)
Example #5
Bar width (pixels), length (ratio) and border (CSS-spec) are also changable.
By the way, BAR_GRAPH also supports floating point numbers and negative values:
$graph = new BAR_GRAPH("vBar");
$graph->labels = "Jan.,Feb.,Mar.,Apr.,May";
$graph->barColors = "white";
$graph->showValues = 1;
$graph->values = "0.38,-0.15,-0.26,0.31,0.43";
$graph->percValuesDecimals = 2;
$graph->barWidth = 40;
$graph->barLength = 1.5;
$graph->barBorder = "2px solid red";
echo $graph->create();
24.84%
9.80%
16.99%
20.26%
28.10%
 0.38  -0.15  -0.26  0.31  0.43 
 Jan.  Feb.  Mar.  Apr.  May 
Example #6
For large amounts of values, it may be useful to split them into several charts:
$graph = new BAR_GRAPH("vBar");
$graph->values = "1,2,3,4,5,6,7,8,9,10,10,9,8,7,6,5,4,3,2,1";
$graph->labelBGColor = "#C0C0F0";
$graph->barBGColor = "#E0E0F0";
$graph->charts = 2;
echo $graph->create();
1%
2%
3%
4%
5%
5%
6%
7%
8%
9%
 1  2  3  4  5  6  7  8  9  10 
9%
8%
7%
6%
5%
5%
4%
3%
2%
1%
 11  12  13  14  15  16  17  18  19  20 
Example #7
It is possible to set extra colors for bars whose value exceeds certain levels:
$graph = new BAR_GRAPH("vBar");
$graph->values = "380,150,260,310,430";
$graph->showValues = 1;
$graph->barLevelColors = array(1, "red", 260, "yellow", 380, "lightgreen");
echo $graph->create();
25%
10%
17%
20%
28%
 380  150  260  310  430 
 1  2  3  4  5 

NOTE: All level-color-pairs should be written in ascending order, and of course this feature is not suited for grouped bar-graphs.

You can also use the keyword MAX for setting the color of the bar with the highest value:
$graph = new BAR_GRAPH("vBar");
$graph->values = "380,150,260,310,430";
$graph->showValues = 1;
$graph->barLevelColors = array(1, "#C0C0FF", 300, "#8080FF", "MAX", "#4040FF");
echo $graph->create();
25%
10%
17%
20%
28%
 380  150  260  310  430 
 1  2  3  4  5 
Example #8
Let's do some more design changes and add a prefix to the values:
$graph = new BAR_GRAPH("vBar");
$graph->values = "380,150,260,310,430";
$graph->labels = "Jan.,Feb.,Mar.,Apr.,May";
$graph->showValues = 1;
$graph->barColors = "#E0E0E0";
$graph->barBGColor = "white";
$graph->barBorder = "1px solid #808080";
$graph->labelColor = "#A0A0A0";
$graph->labelBGColor = "";
$graph->labelBorder = "1px dashed #A0A0A0";
$graph->labelFont = "Arial Black, Arial, Helvetica";
$graph->labelSize = 16;
$graph->absValuesColor = "silver";
$graph->absValuesBGColor = "white";
$graph->absValuesBorder = "1px solid silver";
$graph->absValuesFont = "Verdana, Arial, Helvetica";
$graph->absValuesSize = 14;
$graph->absValuesPrefix = "€";
$graph->percValuesColor = "#C0C0C0";
$graph->percValuesFont = "Comic Sans MS, Times New Roman";
$graph->percValuesSize = 16;
echo $graph->create();
25%
10%
17%
20%
28%
 €380  €150  €260  €310  €430 
 Jan.  Feb.  Mar.  Apr.  May 
Example #9
You can also use images (PNG, JPG or GIF) instead of bar colors, and add some space between labels:
$graph = new BAR_GRAPH("vBar");
$graph->values = "50;30;40, 60;80;50, 70;40;60";
$graph->labels = "Jan.,Feb.,Mar.";
$graph->legend = "cats,dogs,birds";
$graph->barColors = "blue.gif,red.gif,green.gif";
$graph->labelSpace = 10;
echo $graph->create();
10%
6%
8%
13%
17%
10%
15%
8%
13%
 Jan.  Feb.  Mar. 
 
cats
dogs
birds

NOTE: Images are not included in this package.
Example #10
Sometimes you have very similar values, like for instance 1000, 1010, 1020. The difference between them is too small to view in a graph:
$graph = new BAR_GRAPH("vBar");
$graph->values = "1010,1020,1030";
$graph->showValues = 1;
echo $graph->create();
33%
33%
34%
 1010  1020  1030 
 1  2  3 

In this case you can tweak the bar length by using the baseValue variable. Please note that not only the bar length, but also the percentage changes accordingly:
$graph = new BAR_GRAPH("vBar");
$graph->values = "1010,1020,1030";
$graph->baseValue = 1000;
$graph->showValues = 1;
echo $graph->create();
17%
33%
50%
 1010  1020  1030 
 1  2  3 

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