Why trim() affects on the other characters?

Question

The result of this code:

echo trim('سلام؟', '؟');

Is �لام.

Why? I don't even know what's � supposed to be. Where does that come from?

Possible duplicate of [Multibyte trim in PHP?](https://stackoverflow.com/questions/10066647/multibyte-trim-in-php) — Nadav, May 23 '17 at 09:12
[cut arabic string](https://stackoverflow.com/q/32680409/6521116) — LF00, May 23 '17 at 09:23

score 1 · Accepted Answer · answered May 23 '17 at 09:08

1

I think this is because it is right-toleft- language, You can use rtrim()

phpFiddle - Hit "Run F9" to execute

echo rtrim('سلام؟', '؟');

answered May 23 '17 at 09:08

Mi-Creativity

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we don't have question mark before the word in rtl language, so `؟سلام` is not a "valid" anyways – Mi-Creativity May 23 '17 at 09:12
ha ha ha ... you are right .. but it would be much better if I can check it too. – Martin AJ May 23 '17 at 09:13

score 0 · Answer 2 · answered May 23 '17 at 09:11

0

You can use rtrim().

This will remove white space from end of the string.

echo rtrim('سلام؟', '؟');

And your problem solved..

answered May 23 '17 at 09:11

Virb

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score 0 · Answer 3 · answered May 23 '17 at 09:15

0

Your string char is arabic, which is in the reverse order. So you have to use rtrim().

answered May 23 '17 at 09:15

LF00

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score 0 · Answer 4 · answered May 23 '17 at 09:20

rtrim is to replace from the right side of the string and it is OK for OP's requirement. But I think str_replace() is more appropriate. Trim can be done by it, also helpful to replace from any position of string. An example:

$search = ['؟', ' ',]; // Add more elements if required
$str = 'سلام؟';
$output = str_replace($search, '', $str);

echo $output;

Output:

سلام

Why trim() affects on the other characters?

4 Answers4