我正在尝试根据他们进入的月份/年份从我们的帮助台软件创建我们所有票证的图表。我已经对数据库运行了查询，并且得到了我正在寻找的东西。
我发现 PHPGraphlib 可以根据输入的数组生成图表。但是，我不断收到错误，即图表太小或数据点太多。
错误：
我知道它正在正确生成数组，因为我可以通过以下方式查看内容：
print_r($data);
print_r($data) 的输出；
Array ( [March 2012] => 10 [April 2012] => 18 [May 2012] => 20 [June 2012] => 19 [July 2012] => 10 [August 2012] => 22 [September 2012] => 18 [October 2012] => 17 [November 2012] => 15 [December 2012] => 12 [January 2013] => 24 [February 2013] => 18 [March 2013] => 33 [April 2013] => 13 [May 2013] => 20 [June 2013] => 20 [July 2013] => 21 [August 2013] => 13 [September 2013] => 15 [October 2013] => 14 [November 2013] => 14 [December 2013] => 3 [January 2014] => 13 [February 2014] => 15 [March 2014] => 23 [April 2014] => 20 [May 2014] => 33 [June 2014] => 19 )
.
<?php
include("../phpgraphlib.php");
$graph = new PHPGraphLib(1000,1000);
include 'db.inc';
$sql="SELECT FROM_UNIXTIME(swtickets.dateline,'%M %Y') AS Month, Count(DISTINCT(ticketmaskid)) AS Count FROM swtickets GROUP BY FROM_UNIXTIME(swtickets.dateline,'%M %Y') ORDER BY FROM_UNIXTIME(swtickets.dateline,'%Y'), FROM_UNIXTIME(swtickets.dateline,'%m') ASC";
$result=mysql_query($sql);
$data = array();
$num=mysql_numrows($result);
$i=0;
while ($i < $num){
$mon=mysql_result($result,$i,"Month");
$co=mysql_result($result,$i,"Count");
$data[$mon]=$co;
$i++;
}
mysql_close();
$graph->addData($data);
$graph->setBarColor('255,255,204');
$graph->setTitle('Money Made at XYZ Corp');
$graph->setTextColor('gray');
$graph->createGraph();
?>
我还尝试将我的查询限制为仅包含 1 个数据点，但它仍然会产生相同的错误。
如果我手动创建数组，它不会生成错误并按预期生成图形。
<?php
include("../phpgraphlib.php");
$graph = new PHPGraphLib(5000,5000);
$data = array(
"March 2012" => "10",
"April 2012" => "18",
"May 2012" => "20",
"June 2012" => "19",
"July 2012" => "10",
"August 2012" => "22",
"September 2012" => "18",
"October 2012" => "17",
"November 2012" => "15",
"December 2012" => "12",
"January 2013" => "24",
"February 2013" => "18",
"March 2013" => "33",
"April 2013" => "13",
"May 2013" => "20",
"June 2013" => "20",
"July 2013" => "21",
"August 2013" => "13",
"September 2013" => "15",
"October 2013" => "14",
"November 2013" => "14",
"December 2013" => "3",
"January 2014" => "13",
"February 2014" => "15",
"March 2014" => "23",
"April 2014" => "20",
"May 2014" => "33",
"June 2014" => "19",
);
$graph->addData($data);
$graph->setBarColor('255,255,204');
$graph->setTitle('Money Made at XYZ Corp');
$graph->setTextColor('gray');
$graph->createGraph();
?>
输出页面：我在标准的 PHP 页面和 HTML 页面上尝试过，但收到相同的结果。
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<img src="graphs/alltickets.php" />
</body>
</html>
有任何想法吗？您还会推荐任何其他免费的 PHP 图形库吗？