Why is rtrim removing more characters, and giving weird output?

Question

I am trying to remove last few characters from the string using rtrim.

i have string "Scryed (download torrent) - TPB"

i want output string "Scryed"

e.g.

$title_t = "Scryed (download torrent) - TPB";

echo ($title_t)  ;
echo "\n";
$title =  ( rtrim ($title_t, "(download torrent) - TPB") );

echo ($title)  ;

gives

Scryed (download torrent) - TPB
Scry

Why is that ? expected output is

Scryed (download torrent) - TPB
Scryed

`rtrim()` - Strip whitespace (or other characters) from the end of a string. So `trim('abcccd', 'c')` would produce `abd` — Lawrence Cherone, Sep 19 '17 at 18:35
but what if using str_replace and string is (download torrent) - TPB (download torrent) - TPB — , Sep 19 '17 at 18:37
Up-voted because a list of strings (instead of a *set* string) is *not* clarified by the official documentation on php.net as late as Feb 2, 2019. -_- — John, Feb 02 '19 at 19:38

Marcin Szwarc · Answer 1 · 2017-09-19T18:40:56.537

7

It's because rtrim's second parameter is list of characters. Not a string to be trimmed! You should use a substr or str_replace:

$title =  substr($title_t, 0, strlen($title_t) - strlen("(download torrent) - TPB"));

or

$title = str_replace("(download torrent) - TPB", "" , $title_t);

edited Sep 19 '17 at 18:40

answered Sep 19 '17 at 18:37

Marcin Szwarc

569
3
13

1

it should be $title = str_replace("(download torrent) - TPB", "" , $title_t); – Sep 19 '17 at 18:40

Why is rtrim removing more characters, and giving weird output?

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