How to implement this simple function involving regular expressions

How to implement this simple function involving regular expressions? Judge a string (which can only contain the following three characters) with 1.26 English letters 2. "0, 1, 2, 3, 4, 5, 6, 7, 8, 9" 10 digits 3. "-" (a hyphen in English), $ str = & quot;/[^ 0-9a-zA-Z]/I & quot;, how do I implement the simple function of regular expressions in hierarchies?
Judge a string (this string can only contain the following three characters)
1. 26 English letters
2. "," 10 digits
3. "-" (a hyphen in English)

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$ Str = "/[^ 0-9a-zA-Z]/I ";
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Khan Lou lied and dropped "-".
$ Str = "/[^ 0-9a-zA-Z _]/I ";
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Upstairs is wrong.
If it is determined that the object does not exist, '-' is not counted?

Why do I need a-zA-Z when I modify it?

/^ [A-z0-9-] + $/I
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PHP code

Preg_match ('/[-a-z0-9] +/I', $ str); // $ str is the string you want to match
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PHP code
   
    
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     Discussion
     
PHP code
     
Preg_match ('/[-a-z0-9] +/I', $ str); // $ str is the string you want to match
     

    
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     Discussion
     

     
Reference:
     

     
PHP code
     

     $ Str = "jsd-fowfmf564c-s1f23 ";
     
$ Pattern = '/^ [a-z0-9-] + $/I'; // use the upstairs
     
Preg_match ($ pattern, $ str, $ result );
     
If ($ result)
     
{
     
Echo "match ";
     
};
     
?>
     
How to implement it using js?