Remove characters from a string

I'm writing my first object oriented script that spells triads and chords derived from the major, harmonic minor or jazz minor.

I need to remove the characters  ♭ ♯ 𝄪  𝄫 from a note.

So I need to remove the ♯ from D♯ and return a D.

What is the best way to do this?
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Chris StanyonWebDevCommented:
Probably several ways to do it. Loops / Regex / Trimming.

Maybe the simplest is to not 'remove' specific characters, but to only leave specific character, either base on a collection of 'alloweds' or even easier - just return the first character:

var note = "D♯";
var baseNote = note[0];

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Julian HansenCommented:
I might have misunderstood the requirement but can't you do a str_replace on the char you want to replace? If you need to remove multiple chars then preg_replace
$source = "D♯A♭B𝄪C♯EF𝄫G";
$result = preg_replace('[♭|♯|𝄪|𝄫]', '', $source);
echo $result;

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$str = preg_replace("/[^A-Za-z0-9?! ]/","",$str);
this will allow only letters numbers and spaces in your string
Chris StanyonWebDevCommented:
Oops - for some reason, I read this as a C# question - not a PHP one. Here's the PHP version of it:

$note = "D♯";
$baseNote = $note[0];

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burnedfacelessAuthor Commented:
It's cool man I was in C# before I was suspended when marijuana was found in my dorm. I knew what you were saying I was smoking more marijuana instead of coding.
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