How to eliminate/remove last character from a string in php

Question

How i can remove last character dynamically from a php string variable.

$string = '10,20,30,';
echo $string;

Available Output:

10,20,30,

Required Output:

10,20,30

Answer 1

echo substr($string, 0, strlen($string)-1);

• http://php.net/manual/en/function.substr.php
• http://php.net/manual/en/function.strlen.php

Answer 2

rtrim($string, ","); removes comma at the end of the string.

PHP.net rtrim

trim($string, ","); removes comma at the beginning and end of a string.

PHP.net trim

You can also use implode if you're working with arrays :

PHP.net implode

Example from php.net :

<?php

$array = array('lastname', 'email', 'phone');
$comma_separated = implode(",", $array);

echo $comma_separated; // lastname,email,phone

// Empty string when using an empty array:
var_dump(implode('hello', array())); // string(0) ""

?>

Answer 3

You could use

rtrim( $string, ',');

But I think your problem lies elsewhere. Seems like you are adding options to this string in a for/while/foreach loop.

Use this instead:

$string = array[];
foreach ($parts as $part) {
  $string[] = $part;
}
$string = implode( $string, ',');

Answer 4

Yes ! I have gotten answer

$string = chop($string,",");

echo $string;

Output

10,20,30

Answer 5

If PHP > 7.1 then

$string[-1] = PHP_EOL;

DEMO