What's the real world use case here?

$string = 'Laravelll llm    4ever';
$result = Str::deduplicate(Str::deduplicate($string, 'l')); // Laravel lm 4ever (err, no, that's not what we want)

What's the real world use case here?

$string = 'Laravelll llm    4ever';
$result = Str::deduplicate(Str::deduplicate($string, 'l')); // Laravel lm 4ever (err, no, that's not what we want)

The idea is not to have to call it multiple times.
The behaviour that you shared it's not an issue of the implementation of the multiple characters, it's how the deduplicate method works in general. If you call it like this, you'll get the same behaviour

$string = 'Laravell llm 4ever';
$result = Str::deduplicate($string, 'l'); // Laravel lm 4ever

Yeah, sorry, I just copy-pasted it. It wasn't about multiple calls. But the question remains.

Imagine you're creating a feature that "improves" or "fixes" text that the user wrote, you can probably need to deduplicate all spaces and all signs of punctuation.

$formatted = Str::deduplicate($text, [' ', '.', ',', '!', '?']);

Imagine you're creating a feature that "improves" or "fixes" text that the user wrote, you can probably need to deduplicate all spaces and all signs of punctuation.

$formatted = Str::deduplicate($text, [' ', '.', ',', '!', '?']);

$text = 'Loading...';
$formatted = Str::deduplicate($text, [' ', '.', ',', '!', '?']); // "Loading." (err, not quite)