需要有关 Codeigniter gchart 帮助使用的帮助
我按照 wiki 文章 (http://codeigniter.com/wiki/gchart/revision/5312/) 在我的 CI 2.0 中练习 google 图表。 但这不起作用。
控制器文件:ci\application\helpers\mytest.php
$this->load->helper( 'gchart' );
$this->load->view('my_test');
查看文件:ci\application\helpers\my_test.php
$encoded_data = extendedencode(array(0, 1, 2, 3, 4, 5, 6) &maxvalue;);
echo <<< EOS
<img src="
http://chart.apis.google.com/chart?
cht=lc
&chs=250x250
&chd;:e{$encoded}
"
alt="line graph of some example data" />
EOS;
帮助文件:ci\application\helpers\gchart_helper.php
// I do copied all the source code from the wiki url link above.
当我尝试通过 CI 绘制图表时。 它显示错误是这样的, 解析错误:语法错误,意外的“;”在 C:\xampp\htdocs\demo\ci\application\views\my_test.php 第 54 行
我的操作有什么问题吗? 我比较了 gchart_helper.php 中的extendencode()
function extendedencode($data, &$maxvalue='notspecified')
和 my_test.php 中的extendencode()
$encoded_data = extendedencode(array(0, 1, 2, 3, 4, 5, 6) &maxvalue;);
然后我将 my_test.php 视图文件中的extendencode() 行更新为此,
$encoded_data = extendedencode(array(0, 1, 2, 3, 4, 5, 6), &maxvalue);
然后重试,但仍然出现下面的错误。
解析错误:语法错误,意外的“)”,第 54 行 C:\xampp\htdocs\demo\ci\application\views\my_test.php 中期待 T_PAAMAYIM_NEKUDOTAYIM
非常感谢任何帮助或评论。
[已更新]
When I use the formated below,
$encoded_data = extendedencode(array(0, 1, 2, 3, 4, 5, 6) &maxvalue);
showed another four error message.
Events List
A PHP Error was encountered
Severity: Notice
Message: Use of undefined constant maxvalue - assumed 'maxvalue'
Filename: views/my_test.php
Line Number: 54
A PHP Error was encountered
Severity: Warning
Message: max() [function.max]: When only one parameter is given, it must be an array
Filename: helpers/gchart_helper.php
Line Number: 49
A PHP Error was encountered
Severity: Warning
Message: Division by zero
Filename: helpers/gchart_helper.php
Line Number: 55
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: encoded
Filename: views/my_test.php
Line Number: 61
[根据 Frank 的建议更新]
下面仍然出现两个错误,
A PHP Error was encountered
Severity: Notice
Message: Undefined offset: 64
Filename: helpers/gchart_helper.php
Line Number: 65 // code line: $ret .= $grid[$x].$grid[$y];
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: encoded
Filename: views/my_test.php
Line Number: 61 // code line: &chd;:e{$encoded}
I followed the wiki artichle (http://codeigniter.com/wiki/gchart/revision/5312/) to practice google chart in my CI 2.0.
But it doesn't work.
controller file: ci\application\helpers\mytest.php
$this->load->helper( 'gchart' );
$this->load->view('my_test');
view file: ci\application\helpers\my_test.php
$encoded_data = extendedencode(array(0, 1, 2, 3, 4, 5, 6) &maxvalue;);
echo <<< EOS
<img src="
http://chart.apis.google.com/chart?
cht=lc
&chs=250x250
&chd;:e{$encoded}
"
alt="line graph of some example data" />
EOS;
help file: ci\application\helpers\gchart_helper.php
// I do copied all the source code from the wiki url link above.
When I try to charted by CI.
It showed error as this,
Parse error: syntax error, unexpected ';' in C:\xampp\htdocs\demo\ci\application\views\my_test.php on line 54
Any thing wrong on my operation?
I compared the extendedencode() from gchart_helper.php
function extendedencode($data, &$maxvalue='notspecified')
and extendedencode() from my_test.php
$encoded_data = extendedencode(array(0, 1, 2, 3, 4, 5, 6) &maxvalue;);
Then I updated the extendedencode() line to this in my_test.php view file,
$encoded_data = extendedencode(array(0, 1, 2, 3, 4, 5, 6), &maxvalue);
And try again, but still get this error below.
Parse error: syntax error, unexpected ')', expecting T_PAAMAYIM_NEKUDOTAYIM in C:\xampp\htdocs\demo\ci\application\views\my_test.php on line 54
Any help or comments are great appreciated.
[updated]
When I use the formated below,
$encoded_data = extendedencode(array(0, 1, 2, 3, 4, 5, 6) &maxvalue);
showed another four error message.
Events List
A PHP Error was encountered
Severity: Notice
Message: Use of undefined constant maxvalue - assumed 'maxvalue'
Filename: views/my_test.php
Line Number: 54
A PHP Error was encountered
Severity: Warning
Message: max() [function.max]: When only one parameter is given, it must be an array
Filename: helpers/gchart_helper.php
Line Number: 49
A PHP Error was encountered
Severity: Warning
Message: Division by zero
Filename: helpers/gchart_helper.php
Line Number: 55
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: encoded
Filename: views/my_test.php
Line Number: 61
[Updated against Frank's suggestion]
There are still two errors occurred below,
A PHP Error was encountered
Severity: Notice
Message: Undefined offset: 64
Filename: helpers/gchart_helper.php
Line Number: 65 // code line: $ret .= $grid[$x].$grid[$y];
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: encoded
Filename: views/my_test.php
Line Number: 61 // code line: &chd;:e{$encoded}
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评论(2)
亚历克斯的回答在语法上不正确。尝试:
&函数文档中只是告诉您变量将通过引用使用。您不应该(事实上不能)包含 &当你调用该函数时。在旧版本的 PHP 中,有一个名为“调用时传递引用”的功能,您可以在其中使用类似的语法,但在最新版本中不允许这样做。
编辑:
关于您列出的其他错误之一:如错误所示,您向我们展示的代码中没有
$encoded
var 。尝试用&chd;:e{$encoded_data}
替换&chd;:e{$encoded}
——我猜这可能就是你想要的。消除最终错误的一种草率方法是将
$ret .= $grid[$x].$grid[$y];
替换为$ret .= @$grid[$ x].@$grid[$y];
。如果没有正在运行的代码的附加上下文,很难说出实际的根本问题是什么。Alex's answer isn't syntactically correct. Try:
The & in the function documentation just tells you that your variable will be used by reference. You shouldn't (and in fact cannot) include the & when you call the function. In older versions of PHP, there was a feature called call-time pass by reference, in which you'd use syntax like that, but it's disallowed in recent versions.
Edit:
Regarding one of the additional errors you've listed: as the error says, there's no
$encoded
var in the code you've shown us. Try replacing&chd;:e{$encoded}
with&chd;:e{$encoded_data}
-- I'm guessing that might be what you intended.A sloppy method of silencing the final error would be to replace
$ret .= $grid[$x].$grid[$y];
with$ret .= @$grid[$x].@$grid[$y];
. Without additional context for the code in play there, it's hard to say what the actual root issue is there.我认为这一行的分号很糟糕:
就在
&maxvalue
之后。拿出来试试?
I think it's a bad semi colon on this line:
right after
&maxvalue
.Try taking it out?