PHP looping through an array to dynamically create a url

Question

I have a list of data as json which I have decoded in php. I am trying to loop through the array to dynamically display its contents in a url which will display a google chart diagram in PHP. The contents of the data are saved in a php variable $value and $label with concatenation to join the string.

so my url looks somthing like this.

$url = 'https://chart.googleapis.com/chart?cht=p3&chd=t:' **. $value .** '&chs=375x150&chl=' **. $label .** '&chco=4D89F9,009900,FF9900,FF7F7F,FFD088,8FA3D6';

$url = urlencode(**$url**);

Everything looks fine except the image can not be rendered in the php file due to a trailing (,) colon sign.

Here is the full url after being encoded. In bold are the contents of $value

https://chart.googleapis.com/chart?cht=p3&chd=**t:0.3,1.4,65.3,1.0,4.3,0.5,**&chs=375x150&chl=CBD%7CCBN%7CTHC%7CCBC%7CCBG%7CTHCV%7C&chco=4D89F9,009900,FF9900,FF7F7F,FFD088,8FA3D6

You can see after the last value of 0.5 there is a trailing (,) comma sign and I dont know how to get rid of it. When I remove this last comma the image renders itself on the page.

Any help will be greatly appreciated.

Thanks

urlencode won't add commas. It'll be there already in $value, so you need to fix whatever's generating the string in $value. — Marc B
– Marc B, Commented Feb 20, 2014 at 17:57
this is the code: $value .= $data['profiling'][0][$i]['value1']; — user3015195
– user3015195, Commented Feb 20, 2014 at 18:25

Community · Accepted Answer · 2023-11-17 20:33:26Z

5

A simple rtrim() should be what you need.

rtrim($value, ',');

Just do it before you concatenate the URL.

PHP docs on rtrim()

edited Nov 17, 2023 at 20:33

CommunityBot

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answered Feb 20, 2014 at 18:02

crunch

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1 Comment

user3015195 Over a year ago

I tried that and I am still getting the same error.

user3015195 · Accepted Answer · 2014-02-20 18:58:14Z

0

Ok I figured out my problem. And i feel pretty dumb for this, but I wasnt even connected to my remote server via ftp. So the changes made with the rtrim() function were not seen.

Anyways rtrim() did the job!.

answered Feb 20, 2014 at 18:58

user3015195

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