PHP - Manual: Character classes

2024-12-23

Character classes

**Character classes**
Sequence	Description
[...]	A single character listed or contained within a listed range. Ranges can be combined with the `{+}` and `{-}` operators. For example `[a-z]{+}[0-9]` is the same as `[0-9a-z]` and `[a-z]{-}[aeiou]` is the same as `[b-df-hj-np-tv-z]`.
[^...]	A single character not listed and not contained within a listed range.
.	Any character, default `[^\n].`
\d	Digit character, `[0-9]`.
\D	Non-digit character, `[^0-9]`.
\s	White space character, `[ \t\n\r\f\v]`.
\S	Non-white space character, `[^ \t\n\r\f\v]`.
\w	Word character, `[a-zA-Z0-9_]`.
\W	Non-word character, `[^a-zA-Z0-9_]`.

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