The rtrim() function is a built-in function in PHP which is used to removes whitespace from the end of a string.

Syntax

rtrim(string,charlist)

string – This parameter is required. It specifies the string to be checked.

charlist – This parameter is optional. It specifies which characters are to be removed from the string. These functions will remove the following whitespace characters:

  • Space character (” “)
  • Tab character (“t”)
  • Vertical tab character (“v”)
  • Newline character (“n”)
  • Carriage return character (“r”)
  • Null-byte character (“x0B”)

Example

<?php
$str = 'PHP Tutorials!!!     ';
echo strlen($str);        // Output: 21
echo '<br>';
$trim_str = rtrim($str);
echo strlen($trim_str); // Output: 16
?>

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