(PHP 4, PHP 5, PHP 7)
rtrim — Strip whitespace (or other characters) from the end of a string
$str
[, string $character_mask
] ) : string
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:
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.
strThe input string.
character_mask
You 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.
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"