Escape minus char in regular expressions #63
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Still an issue over a year later |
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In PHP 7.3, PCRE2 (the library that parses regular expressions) has been upgraded to version 10.32.
It seems that this new version of PCRE is a bit more picky when parsing regular expressions.
For example,
/^[\w-:]+$is not accepted anymore, we have this error (see https://3v4l.org/vD5O2):The reason?
-is used to represent range of characters when in square brackets (for example:[A-Z]represents a character fromAtoZ).And PCRE now interprets
[\w-:]asany character from \w to :, which doesn't make sense (so the error is thrown).The solution? Just escape
-with\to tell PCRE that we actually want the character-, and not a range of characters.