Php how to remove any last commas

Question

Example output

1. test,test,test,test,test,
2. test,test,test,,
3. test,test,,,
4. test,,,,,

I tried use implode according to my previous question but It's trim only last comma.

How to remove any last commas?

score 111 · Accepted Answer · answered Jun 25 '10 at 18:20

111

rtrim('test,,,,,', ',');

answered Jun 25 '10 at 18:20

Artefacto

score 35 · Answer 2 · answered Jun 25 '10 at 18:21

35

rtrim for example:

$str = 'foo,bar,blah,bleh,';
echo rtrim($str,',');

// foo,bar,blah,bleh

answered Jun 25 '10 at 18:21

Kuchen

score 8 · Answer 3 · answered Jun 25 '10 at 21:49

8

completely different way:

$str = "1,2,3,4,";
$str = substr($str,0,strlen($str)-1);

answered Jun 25 '10 at 21:49

Ricky

10

Old topic but should be noted. Although this would remove the last comma, it would only remove one comma. If the comma was missing it would remove the 4 in this example. – MHowey Mar 07 '13 at 18:47
Also very impractical, since it would remove not only the comma, but other characters too. For example, if we had the `$str = "1,2,3,4"`, it would remove `4`, causing us to end up with `$str = "1,2,3,"` – semihcosu Apr 27 '18 at 08:46
2

"Also very impractical" - that's too polite. It should be noted this "solution" is terrible and could lead to data loss. DO NOT USE. – Paul Feakins Apr 30 '18 at 14:24

3 Answers3