html_entity_decode

PHP -> Funkcie -> Funkcie pre prácu s reťazcami PHP -> html_entity_decode

Syntax

string html_entity_decode ( string string [, int quote_style [, string charset] ] )

Popis

Príkaz jazyka PHP
html_entity_decode -- Convert all HTML entities to their applicable characters

html_entity_decode() is the opposite of htmlentities in that it converts all HTML entities to their applicable characters from string.

The optional second quote_style parameter lets you define what will be done with 'single' and "double" quotes. It takes on one of three constants with the default being ENT_COMPAT:
Available quote_style constants:

Constant Name	Description
ENT_COMPAT	Will convert double-quotes and leave single-quotes alone.
ENT_QUOTES	Will convert both double and single quotes.
ENT_NOQUOTES	Will leave both double and single quotes unconverted.

The ISO-8859-1 character set is used as default for the optional third charset. This defines the character set used in conversion.

Following character sets are supported in PHP 4.3.0 and later.

Supported charsets:

Charset	Aliases	Description
ISO-8859-1	ISO8859-1	Western European, Latin-1
ISO-8859-15	ISO8859-15	Western European, Latin-9. Adds the Euro sign, French and Finnish letters missing in Latin-1(ISO-8859-1).
UTF-8		ASCII compatible multi-byte 8-bit Unicode.
cp866	ibm866, 866	DOS-specific Cyrillic charset. This charset is supported in 4.3.2.
cp1251	Windows-1251, win-1251, 1251	Windows-specific Cyrillic charset. This charset is supported in 4.3.2.
cp1252	Windows-1252, 1252	Windows specific charset for Western European.
KOI8-R	koi8-ru, koi8r	Russian. This charset is supported in 4.3.2.
BIG5	950	Traditional Chinese, mainly used in Taiwan.
GB2312	936	Simplified Chinese, national standard character set.
BIG5-HKSCS		Big5 with Hong Kong extensions, Traditional Chinese.
Shift_JIS	SJIS, 932	Japanese
EUC-JP	EUCJP	Japanese

Poznámka: Any other character sets are not recognized and ISO-8859-1 will be used instead.

Poznámka: You might wonder why trim(html_entity_decode(' ')); doesn't reduce the string to an empty string, that's because the ' ' entity is not ASCII code 32 (which is stripped by trim()) but ASCII code 160 (0xa0) in the default ISO 8859-1 characterset.

Príklad

<?php
$orig = "I'll \"walk\" the dog now";

$a = htmlentities($orig);

$b = html_entity_decode($a);

echo $a; // I'll "walk" the dog now

echo $b; // I'll "walk" the dog now

// For users prior to PHP 4.3.0 you may do this:
function unhtmlentities($string)
{
 $trans_tbl = get_html_translation_table(HTML_ENTITIES);
 $trans_tbl = array_flip($trans_tbl);
 return strtr($string, $trans_tbl);
}

$c = unhtmlentities($a);

echo $c; // I'll "walk" the dog now

?>

Pozri aj

htmlentities, htmlspecialchars, get_html_translation_table, and urldecode.