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(PHP 3, PHP 4, PHP 5)

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


string rtrim ( string str [, string charlist] )

Notatka: The second parameter was added in PHP 4.1.0

This function returns a string with whitespace stripped from the end of str. Without the second parameter, rtrim() will strip these characters:

  • " " (ASCII 32 (0x20)), an ordinary space.

  • "\t" (ASCII 9 (0x09)), a tab.

  • "\n" (ASCII 10 (0x0A)), a new line (line feed).

  • "\r" (ASCII 13 (0x0D)), a carriage return.

  • "\0" (ASCII 0 (0x00)), the NUL-byte.

  • "\x0B" (ASCII 11 (0x0B)), a vertical tab.

You can also specify the characters you want to strip, by means of the charlist parameter. Simply list all characters that you want to be stripped. With .. you can specify a range of characters.

Przykład 1. Usage example of rtrim()


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


$trimmed = rtrim($text);

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

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

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


Powyższy przykład wyświetli:

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() and ltrim().