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Editorial Team
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Asked: 2026-05-29T07:18:32+00:00

Whats wrong with this regular expression? ^[a-zA-Z,\d,\&,\#,\-,\(,\’]{3,15}$ Valid input is alphanumeric , space ,

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Whats wrong with this regular expression? 

^[a-zA-Z,\d,\&,\#,\-,\(,\']{3,15}$

Valid input is alphanumeric, space, #, &, ', , - with max and minimum length of 3 and 15 respectively.

when I enter the following valid input, it fails:

MT90#&' ABCD
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1 Answer

  1. Editorial Team

    You missed space \s, and no need to use , in char set.

    This will be ok:

    /^[a-zA-Z\d\s&#-\(']{3,15}$/

    Update:
    \s will match on all whitespace (including tabs and line breaks as well as spaces), if you want just space, change to :

    /^[a-zA-Z\d &#-\(']{3,15}$/
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