mb_decode_numericentity()
(PHP 4 >= 4.0.6, PHP 5, PHP 7)
根据 HTML 数字字符串解码成字符
说明
mb_decode_numericentity (string $str,array $convmap[,string $encoding= mb_internal_encoding() ] ) : string
将数字字符串的引用$str按指定的字符块转换成字符串。
参数
- $str
要解码的 string。
- $convmap
$convmap是一个 array，指定了要转换的代码区域。
- $encoding
$encoding参数为字符编码。如果省略，则使用内部字符编码。
返回值
转换后的字符串。
范例
Example #1$convmap例子
<?php $convmap = array ( int start_code1, int end_code1, int offset1, int mask1, int start_code2, int end_code2, int offset2, int mask2, ........ int start_codeN, int end_codeN, int offsetN, int maskN ); // Specify Unicode value for start_codeN and end_codeN // Add offsetN to value and take bit-wise 'AND' with maskN, // then convert value to numeric string reference. ?>
参见
mb_encode_numericentity()Encode character to HTML numeric string reference
Example #2$convmap的例子： 编码(escape) JavaScript 字符串
<?php
function escape_javascript_string($str) {
$map = [
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,0,0, // 49
0,0,0,0,0,0,0,0,1,1,
1,1,1,1,1,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,1,1,1,1,1,1,0,0,0, // 99
0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,
0,0,0,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1, // 149
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1, // 199
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1, // 249
1,1,1,1,1,1,1, // 255
];
// Char encoding is UTF-8
$mblen = mb_strlen($str, 'UTF-8');
$utf32 = bin2hex(mb_convert_encoding($str, 'UTF-32', 'UTF-8'));
for ($i=0, $encoded=''; $i < $mblen; $i++) {
$u = substr($utf32, $i*8, 8);
$v = base_convert($u, 16, 10);
if ($v < 256 && $map[$v]) {
$encoded .= '\\x'.substr($u, 6,2);
} else if ($v == 2028) {
$encoded .= '\\u2028';
} else if ($v == 2029) {
$encoded .= '\\u2029';
} else {
$encoded .= mb_convert_encoding(hex2bin($u), 'UTF-8', 'UTF-32');
}
}
return $encoded;
}
// Test data
$convmap = [ 0x0, 0xffff, 0, 0xffff ];
$msg = '';
for ($i=0; $i < 1000; $i++) {
// chr() cannot generate correct UTF-8 data larger value than 128, use mb_decode_numericentity().
$msg .= mb_decode_numericentity('&#'.$i.';', $convmap, 'UTF-8');
}
// var_dump($msg);
var_dump(escape_javascript_string($msg));note that at this time it seems that mb_decode_numericentity() only works with decimal entities and not hexadecimal entities. This fact would have saved me a good hour of time in debugging. For those who need to convert hex entities try first converting them all to decimal entities with a combination of the preg_replace() and hexdec() functions.
Just two great functions for daily use:
/* Converts any HTML-entities into characters */
function my_numeric2character($t)
{
$convmap = array(0x0, 0x2FFFF, 0, 0xFFFF);
return mb_decode_numericentity($t, $convmap, 'UTF-8');
}
/* Converts any characters into HTML-entities */
function my_character2numeric($t)
{
$convmap = array(0x0, 0x2FFFF, 0, 0xFFFF);
return mb_encode_numericentity($t, $convmap, 'UTF-8');
}
print my_numeric2character('’ ἀ â');
print my_character2numeric(' ');Here are functions to convert hankaku to zenkaku characters (and vice-versa) in Japanese text.
<?php
// Supported characters:
// (space)
// !#$%&()*+,./0123456789:;<=>?@
// ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`
// abcdefghijklmnopqrstuvwxyz{|}
// (Katakana isn't supported.)
function f_han2zen ($string,$encoding = null) {
if (is_null($encoding)) $encoding = mb_internal_encoding();
$convmap = array(
0x20,0x20,0x3000-0x20,0xffff, // Space
0x21,0x7e,0xff01-0x21,0xffff);
$temp = mb_encode_numericentity($string,$convmap,$encoding);
$convmap = array(0,0xffff,0,0xffff);
return mb_decode_numericentity($temp,$convmap,$encoding);
}
function f_zen2han ($string,$encoding = null) {
if (is_null($encoding)) $encoding = mb_internal_encoding();
$convmap = array(
0x3000,0x3000,-(0x3000-0x20),0xffff, // Space
0xff01,0xff5e,-(0xff01-0x21),0xffff);
$temp = mb_encode_numericentity($string,$convmap,$encoding);
$convmap = array(0,0xffff,0,0xffff);
return mb_decode_numericentity($temp,$convmap,$encoding);
}
// Sample usage:
f_han2zen("test","shift_jis");
f_han2zen("test","utf-8");
?>
Many web browsers will tend upload high order characters as UTF-8 encoded entities.
Here is some simple code to convert UTF-8 HTML entities within a block of text into proper characters:
<?php
//decode decimal HTML entities added by web browser
$body = preg_replace('/&#\d{2,5};/ue', "utf8_entity_decode('$0')", $body );
//decode hex HTML entities added by web browser
$body = preg_replace('/&#x([a-fA-F0-7]{2,8});/ue', "utf8_entity_decode('&#'.hexdec('$1').';')", $body );
//callback function for the regex
function utf8_entity_decode($entity){
$convmap = array(0x0, 0x10000, 0, 0xfffff);
return mb_decode_numericentity($entity, $convmap, 'UTF-8');
}
?>
Manual entity => utf8 conversion:
<?php
// parse entities
$raw = preg_replace_callback
(
"/&#(\\d+);/u",
"_pcreEntityToUtf",
$raw
);
function _pcreEntityToUtf($matches)
{
$char = intval(is_array($matches) ? $matches[1] : $matches);
if ($char < 0x80)
{
// to prevent insertion of control characters
if ($char >= 0x20) return htmlspecialchars(chr($char));
else return "&#$char;";
}
else if ($char < 0x8000)
{
return chr(0xc0 | (0x1f & ($char >> 6))) . chr(0x80 | (0x3f & $char));
}
else
{
return chr(0xe0 | (0x0f & ($char >> 12))) . chr(0x80 | (0x3f & ($char >> 6))). chr(0x80 | (0x3f & $char));
}
}
?>
By use of function utf8_decode you'll get a problem with all extended chars above ISO-8859-1 charset. You can solve this problem by using the function mb_encode_numericentity before: // convert $text from UTF-8 to ISO-8859-1 $convmap = array(0xFF, 0x2FFFF, 0, 0xFFFF); $text = mb_encode_numericentity($text, $convmap, "UTF-8"); $text = utf8_decode($text); The second line encodes all extended chars below 0xFF, the third line converts the rest: 0x80 - 0xFF