Strip whitespace (or other characters) from the end of a string

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- PHP Manual
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- Strip whitespace (or other characters) from the end of a string

# rtrim

(PHP 4, PHP 5, PHP 7, PHP 8)

rtrim — Strip whitespace (or other characters) from the end of a string

### Description

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

This function returns a string with whitespace (or other characters) stripped from the end of `string`.

Without the second parameter, rtrim() will strip these characters:

- `" "`: ASCII SP character `0x20`, an ordinary space.
- `"\t"`: ASCII HT character `0x09`, a tab.
- `"\n"`: ASCII LF character `0x0A`, a new line (line feed).
- `"\r"`: ASCII CR character `0x0D`, a carriage return.
- `"\0"`: ASCII NUL character `0x00`, the NUL-byte.
- `"\v"`: ASCII VT character `0x0B`, a vertical tab.

### Parameters

`string`
  The input string.
`characters`
  Optionally, the stripped characters can also be specified using the `characters` parameter. Simply list all characters that need to be stripped. With `..` it is possible to specify an incrementing range of characters.

### Return Values

Returns the modified string.

### Examples

Example #1 Usage example of rtrim()

    <?php

    $text = "\t\tThese are a few words :) ...  ";
    $binary = "\x09Example string\x0A";
    $hello  = "Hello World";
    var_dump($text, $binary, $hello);

    print "\n";

    $trimmed = rtrim($text);
    var_dump($trimmed);

    $trimmed = rtrim($text, " \t.");
    var_dump($trimmed);

    $trimmed = rtrim($hello, "Hdle");
    var_dump($trimmed);

    // trim the ASCII control characters at the end of $binary
    // (from 0 to 31 inclusive)
    $clean = rtrim($binary, "\x00..\x1F");
    var_dump($clean);

    ?>

The above example will output:

    string(32) "        These are a few words :) ...  "
    string(16) "    Example string
    "
    string(11) "Hello World"

    string(30) "        These are a few words :) ..."
    string(26) "        These are a few words :)"
    string(9) "Hello Wor"
    string(15) "    Example string"

### See Also

- trim() - Strip whitespace (or other characters) from the beginning and end of a string
- ltrim() - Strip whitespace (or other characters) from the beginning of a string