How do I remove the last comma from a string using PHP?

Question

I am using a loop to get values from my database and my result is like:

'name', 'name2', 'name3',

And I want it like this:

'name', 'name2', 'name3'

I want to remove the comma after the last value of the loop.

You should `implode` your original values with commas, not loop over them and remove stuff at the end. — moonwave99, Mar 14 '13 at 12:03

score 252 · Accepted Answer · edited Jul 06 '19 at 22:04

252

Use the rtrim function:

rtrim($my_string, ',');

The Second parameter indicates the character to be deleted.

edited Jul 06 '19 at 22:04

Peter Mortensen

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answered Mar 14 '13 at 12:02

Ander2

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Also make sure you don't have any trailing space after the comma, otherwise this will fail, or do rtrim(trim($my_string), ','). – Foxhoundn Mar 03 '15 at 12:14
Excellent answer! – DiChrist Nov 18 '16 at 12:36
@Foxhoundn Your comment is saviour. Thanks bro – Jaydeep Goswami Jun 26 '17 at 10:10
2

This doesn't work in a loop that adds a comma at the end as it will remove all the commas. – LizardKG Mar 11 '20 at 21:35

Boaz · Answer 2 · 2013-03-14T12:52:59.243

28

Try:

$string = "'name', 'name2', 'name3',";
$string = rtrim($string,',');

edited Mar 14 '13 at 12:52

answered Mar 14 '13 at 12:02

Boaz

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1

I already tried it but its showing like this: 'name''name2''name3' This is not what I need – JoJo Mar 14 '13 at 12:43
Per your example, you need to apply this function only on the final result and not on each value separately. – Boaz Mar 14 '13 at 12:47
I am using loop so how can I know the final result of loop ? – JoJo Mar 14 '13 at 13:56
The final result of the loop is stored in a variable, right? So apply the `rtrim` call to that variable. If you're still having difficulty, update your question with the code that produces the loop. – Boaz Mar 14 '13 at 14:00
I like this answer in particular, because one of the issues with a lot of PHP built-in functions, is that some of them are void, and some of them have return types. In this case, I was trying to just write `rtrim($string, ',')`, when I should be writing `$string = rtrim($string, ',');` – Alec Oct 14 '16 at 08:47
@Alec: Afaik, most of the [String functions](http://php.net/manual/en/ref.strings.php) have a return value. Void funcitons that directly modify the parameter can be for arrays or objects. (sorry a bit OT but can help memorize it!) – T30 Mar 20 '17 at 15:09

score 15 · Answer 3 · edited Jul 06 '19 at 22:04

15

Try the below code:

$my_string = "'name', 'name2', 'name3',";
echo substr(trim($my_string), 0, -1);

Use this code to remove the last character of the string.

edited Jul 06 '19 at 22:04

Peter Mortensen

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answered Mar 30 '15 at 08:59

VijayS91

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score 11 · Answer 4 · edited May 27 '16 at 11:26

11

You can use substr function to remove this.

$t_string = "'test1', 'test2', 'test3',";
echo substr($t_string, 0, -1);

edited May 27 '16 at 11:26

Hassaan

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answered Mar 22 '16 at 06:59

Annie Chandel

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score 7 · Answer 5 · edited May 14 '14 at 12:52

7

rtrim function

rtrim($my_string,',');

Second parameter indicates that comma to be deleted from right side.

edited May 14 '14 at 12:52

Boaz

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answered Feb 04 '14 at 07:55

Jitendra Tyagi

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score 5 · Answer 6 · answered Mar 14 '13 at 12:02

5

use rtrim()

rtrim($string,',');

answered Mar 14 '13 at 12:02

Sankalp Mishra

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score 5 · Answer 7 · answered Nov 30 '18 at 12:07

5

It is better to use implode for that purpose. Implode is easy and awesome:

    $array = ['name1', 'name2', 'name3'];
    $str = implode(', ', $array);

Output:

    name1, name2, name3

answered Nov 30 '18 at 12:07

khandaniel

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It's uneccessary to generate an array first out of database-read values. rtrim & substr are both valid - and good - solutions. – Steve Horvath Jun 24 '19 at 04:30
Well, you're right but if you have an array this is a handy solution – khandaniel Jun 24 '19 at 13:52

score 4 · Answer 8 · answered Apr 19 '17 at 09:27

It will impact your script if you work with multi-byte text that you substring from. If this is the case, I higly recommend enabling mb_* functions in your php.ini or do this ini_set("mbstring.func_overload", 2);

$string = "'test1', 'test2', 'test3',";
echo mb_substr($string, 0, -1);

score 3 · Answer 9 · answered Oct 24 '19 at 05:56

You can use one of the following technique to remove the last comma(,)

Solution1:

$string = "'name', 'name2', 'name3',";  // this is the full string or text.
$string = chop($string,",");            // remove the last character (,) and store the updated value in $string variable.
echo $string;                           // to print update string.

Solution 2:

$string = '10,20,30,';              // this is the full string or text.
$string = rtrim($string,',');
echo $string;                       // to print update string.

Solution 3:

 $string = "'name', 'name2', 'name3',";  // this is the full string or text.
 $string = substr($string , 0, -1);
 echo $string;

score 2 · Answer 10 · answered Dec 09 '17 at 11:44

2

its as simple as:

$commaseparated_string = name,name2,name3,;
$result = rtrim($commaseparated_string,',');

answered Dec 09 '17 at 11:44

Ketan Savaliya

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score 0 · Answer 11 · answered Sep 04 '20 at 15:24

Solutions to apply during a loop:

//1 - Using conditional:

$source = array (1,2,3);
$total = count($source);
    
$str = null;
    
for($i=0; $i <= $total; $i++){ 
        
    if($i < $total) {
        $str .= $i.',';
    }
    else {
        $str .= $i;
    }
}
    
echo $str; //0,1,2,3

//2 - Using rtrim:

$source = array (1,2,3);
$total = count($source);

$str = null;

for($i=0; $i <= $total; $i++){ 
    
        $str .= $i.',';
}

$str = substr($str,0,strlen($str)-1);
echo $str; //0,1,2,3

How do I remove the last comma from a string using PHP?

11 Answers11

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