php man page for iswspace

ISWSPACE(3)						     Linux Programmer's Manual						       ISWSPACE(3)

NAME
       iswspace - test for whitespace wide character

SYNOPSIS
       #include <wctype.h>

       int iswspace(wint_t wc);

DESCRIPTION
       The  iswspace() function is the wide-character equivalent of the isspace(3) function.  It tests whether wc is a wide character belonging to
       the wide-character class "space".

       The wide-character class "space" is disjoint from the wide-character class "graph" and therefore also disjoint from its subclasses "alnum",
       "alpha", "upper", "lower", "digit", "xdigit", "punct".

       The wide-character class "space" contains the wide-character class "blank".

       The wide-character class "space" always contains at least the space character and the control characters 'f', '
', '
', '	', 'v'.

RETURN VALUE
       The  iswspace()	function  returns  nonzero if wc is a wide character belonging to the wide-character class "space".  Otherwise, it returns
       zero.

ATTRIBUTES
       For an explanation of the terms used in this section, see attributes(7).

       +-----------+---------------+----------------+
       |Interface  | Attribute	   | Value	    |
       +-----------+---------------+----------------+
       |iswspace() | Thread safety | MT-Safe locale |
       +-----------+---------------+----------------+
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, C99.

NOTES
       The behavior of iswspace() depends on the LC_CTYPE category of the current locale.

SEE ALSO
       isspace(3), iswctype(3)

COLOPHON
       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

GNU
								    2015-08-08							       ISWSPACE(3)