PHP 8 reference · String Functions

PHP rtrim() Function

Remove whitespace or other chosen characters from the end (right side) of a string. chop() is an alias.

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Syntax

rtrim(string $string, string $characters = " \n\r\t\v\x00"): string

Parameter	Description
`string`	The input string.
`characters` optional	The characters to strip. Default: `" \n\r\t\v\x00"`

The string without trailing characters.

Strip from the rightTry it yourself

<?php
var_dump(rtrim("line of text\r\n"));
echo rtrim("https://example.com///", "/"), "\n";

Output

string(12) "line of text"
https://example.com

Remove a trailing separatorTry it yourself

<?php
$list = "";
foreach (["a", "b", "c"] as $item) {
    $list .= "$item, ";
}
echo rtrim($list, ", "), "\n"; // implode() is usually simpler

Output

a, b, c

Version	Change
PHP 4.0	Added

trim() · Remove whitespace (or other characters you choose) from both ends of a string. Spaces inside the string are kept.
ltrim() · Remove whitespace or other chosen characters from the start (left side) of a string only.
implode() · Join array elements into one string with a separator between them. join() is an alias of implode().
PHP Strings · tutorial