(PHP 4, PHP 5, PHP 7, PHP 8)
rtrim — Strip whitespace (or other characters) from the end of a string
$string, string $characters = " \n\r\t\v\0"): 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:
32
(0x20)), an ordinary space.
9
(0x09)), a tab.
10
(0x0A)), a new line (line feed).
13
(0x0D)), a carriage return.
0
(0x00)), the NULL-byte.
11
(0x0B)), a vertical tab.
stringThe input string.
characters
You can also specify the characters you want to strip, by means
of the characters parameter.
Simply list all characters that you want to be stripped. With
.. you can specify a range of characters.
Returns the modified string.
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"