HTML::Entities - Encode or decode strings with HTML entities
use HTML::Entities; $a = "Våre norske tegn bør æres"; decode_entities($a); encode_entities($a, "\200-\377");
For example, this:
$input = "vis-à-vis Beyoncés naïve\npapier-mâché résumé"; print encode_entities($input), "\n"
Prints this out:
vis-à-vis Beyoncés naïve papier-mâché résumé
This module deals with encoding and decoding of strings with HTML character entities. The module provides the following functions:
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.
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.
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.
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::Entities qw(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 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.