\d less efficient than [0-9]

Re:\d less efficient than [0-9] by LawnGnome on Sunday May 19, 2013 @06:43PM (#5734714)

Happens in PHP only if you enable Unicode regex handling via the /u modifier and are running libpcre 8.10 or later (which corresponds to PHP 5.3.4 and later, assuming you're using the bundled libpcre): http://3v4l.org/QD3k0

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Re:\d less efficient than [0-9] by bodyfour on Sunday May 19, 2013 @07:21PM (#5734854)

If you're using pcre directly from C code, this is controlled by specifying the PCRE_UCP flag to pcre_compile(). By default, \d and friends only match ASCII characters even if the PCRE_UTF8 flag is set.

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