1HTML::Entities(3)     User Contributed Perl Documentation    HTML::Entities(3)
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NAME

6       HTML::Entities - Encode or decode strings with HTML entities
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SYNOPSIS

9        use HTML::Entities;
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11        $a = "Våre norske tegn bør &#230res";
12        decode_entities($a);
13        encode_entities($a, "\200-\377");
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15       For example, this:
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17        $input = "vis-à-vis Beyoncé's naïve\npapier-mâché résumé";
18        print encode_entities($input), "\n"
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20       Prints this out:
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22        vis-à-vis Beyoncé's naïve
23        papier-mâché résumé
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DESCRIPTION

26       This module deals with encoding and decoding of strings with HTML
27       character entities.  The module provides the following functions:
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29       decode_entities( $string, ... )
30           This routine replaces HTML entities found in the $string with the
31           corresponding Unicode character.  Unrecognized entities are left
32           alone.
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34           If multiple strings are provided as argument they are each decoded
35           separately and the same number of strings are returned.
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37           If called in void context the arguments are decoded in-place.
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39           This routine is exported by default.
40
41       _decode_entities( $string, \%entity2char )
42       _decode_entities( $string, \%entity2char, $expand_prefix )
43           This will in-place replace HTML entities in $string.  The
44           %entity2char hash must be provided.  Named entities not found in
45           the %entity2char hash are left alone.  Numeric entities are
46           expanded unless their value overflow.
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48           The keys in %entity2char are the entity names to be expanded and
49           their values are what they should expand into.  The values do not
50           have to be single character strings.  If a key has ";" as suffix,
51           then occurrences in $string are only expanded if properly
52           terminated with ";".  Entities without ";" will be expanded
53           regardless of how they are terminated for compatibility with how
54           common browsers treat entities in the Latin-1 range.
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56           If $expand_prefix is TRUE then entities without trailing ";" in
57           %entity2char will even be expanded as a prefix of a longer
58           unrecognized name.  The longest matching name in %entity2char will
59           be used. This is mainly present for compatibility with an MSIE
60           misfeature.
61
62              $string = "foo&nbspbar";
63              _decode_entities($string, { nb => "@", nbsp => "\xA0" }, 1);
64              print $string;  # will print "foo bar"
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66           This routine is exported by default.
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68       encode_entities( $string )
69       encode_entities( $string, $unsafe_chars )
70           This routine replaces unsafe characters in $string with their
71           entity representation. A second argument can be given to specify
72           which characters to consider unsafe.  The unsafe characters is
73           specified using the regular expression character class syntax (what
74           you find within brackets in regular expressions).
75
76           The default set of characters to encode are control chars, high-bit
77           chars, and the "<", "&", ">", "'" and """ characters.  But this,
78           for example, would encode just the "<", "&", ">", and """
79           characters:
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81             $encoded = encode_entities($input, '<>&"');
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83           and this would only encode non-plain ASCII:
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85             $encoded = encode_entities($input, '^\n\x20-\x25\x27-\x7e');
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87           This routine is exported by default.
88
89       encode_entities_numeric( $string )
90       encode_entities_numeric( $string, $unsafe_chars )
91           This routine works just like encode_entities, except that the
92           replacement entities are always "&#xhexnum;" and never "&entname;".
93           For example, "encode_entities("r\xF4le")" returns "r&ocirc;le", but
94           "encode_entities_numeric("r\xF4le")" returns "r&#xF4;le".
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96           This routine is not exported by default.  But you can always export
97           it with "use HTML::Entities qw(encode_entities_numeric);" or even
98           "use HTML::Entities qw(:DEFAULT encode_entities_numeric);"
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100       All these routines modify the string passed as the first argument, if
101       called in a void context.  In scalar and array contexts, the encoded or
102       decoded string is returned (without changing the input string).
103
104       If you prefer not to import these routines into your namespace, you can
105       call them as:
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107         use HTML::Entities ();
108         $decoded = HTML::Entities::decode($a);
109         $encoded = HTML::Entities::encode($a);
110         $encoded = HTML::Entities::encode_numeric($a);
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112       The module can also export the %char2entity and the %entity2char
113       hashes, which contain the mapping from all characters to the
114       corresponding entities (and vice versa, respectively).
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117       Copyright 1995-2006 Gisle Aas. All rights reserved.
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119       This library is free software; you can redistribute it and/or modify it
120       under the same terms as Perl itself.
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124perl v5.34.0                      2021-07-22                 HTML::Entities(3)
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