PHP rtrim() Function

The rtrim() function removes whitespace or other predefined characters from the right side of a string.

Related functions:

  • ltrim() - Removes whitespace or other predefined characters from the left side of a string
  • trim() - Removes whitespace or other predefined characters from both sides of a string
string rtrim ( string $str [, string $character_mask ] )

This function returns a string with whitespace (or other characters) 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 NULL-byte.
  • "\x0B" (ASCII 11 (0x0B)), a vertical tab.

Example -

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"

ParameterDescription
strThe input string.
character_maskYou can also specify the characters you want to strip, by means of the character_mask parameter. Simply list all characters that you want to be stripped. With .. you can specify a range of characters.

Returns the modified string.