Why a regular expression `[A-z]` is considered suspicious

Asked Aug 08 '19 at 13:39

Active Aug 08 '19 at 13:49

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I'm using PHPStorm with PHP Inspections. To validate a given value is in Base64 format I'm testing against the regular expression

^[A-z0-9/\+]+=*$

PHP Inspections mentions

'A-z' range in '[A-z0-9/\+]' is looking rather suspicious, please check.

I know A range of A-z means from character with code #65 to character with code #122. There is no other character than standard-latin characters in that range.

So I can't see anything suspicious with this regular expression. The only thing maybe, if there's any charset I don't know with any non-standard-latin characters in that mentioned range.

asked Aug 08 '19 at 13:39

codekandis

It's a common typo, you can always turn off such inspection. – Mike Doe Aug 08 '19 at 13:40
@emix I know I can, but I don't decide to until I know why it occurres. – codekandis Aug 08 '19 at 14:24

Why a regular expression `[A-z]` is considered suspicious

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