HTML::Entities(3) User Contributed Perl Documentation HTML::Entities(3)NAMEHTML::Entities - Encode or decode strings with HTML entities
SYNOPSIS
use HTML::Entities;
$a = "Våre norske tegn bør æres";
decode_entities($a);
encode_entities($a, "\200-\377");
For example, this:
$input = "vis-a-vis Beyonce's naieve\npapier-mache resume";
print encode_entities($input), "\n"
Prints this out:
vis-à-vis Beyoncé's naïve
papier-mâché résumé
DESCRIPTION
This module deals with encoding and decoding of strings with HTML
character entities. The module provides the following functions:
decode_entities( $string, ... )
This routine replaces HTML entities found in the $string with the
corresponding Unicode character. Unrecognized entities are left
alone.
If multiple strings are provided as argument they are each decoded
separately and the same number of strings are returned.
If called in void context the arguments are decoded in-place.
This routine is exported by default.
_decode_entities( $string, \%entity2char )
_decode_entities( $string, \%entity2char, $expand_prefix )
This will in-place replace HTML entities in $string. The
%entity2char hash must be provided. Named entities not found in
the %entity2char hash are left alone. Numeric entities are
expanded unless their value overflow.
The keys in %entity2char are the entity names to be expanded and
their values are what they should expand into. The values do not
have to be single character strings. If a key has ";" as suffix,
then occurrences in $string are only expanded if properly
terminated with ";". Entities without ";" will be expanded
regardless of how they are terminated for compatibility with how
common browsers treat entities in the Latin-1 range.
If $expand_prefix is TRUE then entities without trailing ";" in
%entity2char will even be expanded as a prefix of a longer
unrecognized name. The longest matching name in %entity2char will
be used. This is mainly present for compatibility with an MSIE
misfeature.
$string = "foo bar";
_decode_entities($string, { nb => "@", nbsp => "\xA0" }, 1);
print $string; # will print "foo bar"
This routine is exported by default.
encode_entities( $string )
encode_entities( $string, $unsafe_chars )
This routine replaces unsafe characters in $string with their
entity representation. A second argument can be given to specify
which characters to consider unsafe. The unsafe characters is
specified using the regular expression character class syntax (what
you find within brackets in regular expressions).
The default set of characters to encode are control chars, high-bit
chars, and the "<", "&", ">", "'" and """ characters. But this,
for example, would encode just the "<", "&", ">", and """
characters:
$encoded = encode_entities($input, '<>&"');
and this would only encode non-plain ascii:
$encoded = encode_entities($input, '^\n\x20-\x25\x27-\x7e');
This routine is exported by default.
encode_entities_numeric( $string )
encode_entities_numeric( $string, $unsafe_chars )
This routine works just like encode_entities, except that the
replacement entities are always "&#xhexnum;" and never "&entname;".
For example, "encode_entities("r\xF4le")" returns "rôle", but
"encode_entities_numeric("r\xF4le")" returns "rôle".
This routine is not exported by default. But you can always export
it with "use HTML::Entitiesqw(encode_entities_numeric);" or even
"use HTML::Entities qw(:DEFAULT encode_entities_numeric);"
All these routines modify the string passed as the first argument, if
called in a void context. In scalar and array contexts, the encoded or
decoded string is returned (without changing the input string).
If you prefer not to import these routines into your namespace, you can
call them as:
use HTML::Entities ();
$decoded = HTML::Entities::decode($a);
$encoded = HTML::Entities::encode($a);
$encoded = HTML::Entities::encode_numeric($a);
The module can also export the %char2entity and the %entity2char
hashes, which contain the mapping from all characters to the
corresponding entities (and vice versa, respectively).
COPYRIGHT
Copyright 1995-2006 Gisle Aas. All rights reserved.
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
perl v5.18.2 2013-03-25 HTML::Entities(3)
