mb_decode_numericentity
(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)
mb_decode_numericentity — 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。如果省略或是null
,则使用内部字符编码。
返回值
转换后的字符串。
范例
示例 #1 convmap
例子
<?php
$convmap = array (
int start_code1, int end_code1, int offset1, int mask1,
int start_code2, int end_code2, int offset2, int mask2,
........
int start_codeN, int end_codeN, int offsetN, int maskN );
// Specify Unicode value for start_codeN and end_codeN
// Add offsetN to value and take bit-wise 'AND' with maskN,
// then convert value to numeric string reference.
?>
参见
- mb_encode_numericentity() - Encode character to HTML numeric string reference
示例 #2 convmap
的例子: 编码(escape) JavaScript 字符串
<?php
function escape_javascript_string($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($msg));
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User Contributed Notes 3 notes
dev at glossword info ¶
18 years ago
Just two great functions for daily use:
/* Converts any HTML-entities into characters */
function my_numeric2character($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(' 备份地址:http://www.lvesu.com/blog/php/function.mb-decode-numericentity.php