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

问题

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.

回答1:

Use the rtrim function:

rtrim($my_string, ',');

The Second parameter indicates the character to be deleted.

回答2:

Try:

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

回答3:

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.

回答4:

You can use substr function to remove this.

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

回答5:

rtrim function

rtrim($my_string,',');

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

回答6:

At first I tried without a space rtrim($arraynama,","); and got an invalid result.

Then I added a space and got a valid result:

$newarraynama=rtrim($arraynama,", ");

回答7:

use rtrim()

rtrim($string,',');

回答8:

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);

回答9:

its as simple as:

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

回答10:

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

回答11:

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;

来源：https://stackoverflow.com/questions/15408691/how-do-i-remove-the-last-comma-from-a-string-using-php

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php

string

substr