mb_decode_numericentity
(PHP 4 >= 4.0.6, PHP 5, PHP 7)
mb_decode_numericentity — Decode HTML numeric string reference to character
Description
$str
, array $convmap
[, string $encoding = mb_internal_encoding()
[, bool $is_hex = FALSE
]] ) : string
Convert numeric string reference of string
str in a specified block to character.
Parameters
Examples
Example #1 convmap example
<?php
$convmap = array (
int start_code1, int end_code1, int offset1, int mask1,
int start_code2, int end_code2, int offset2, int mask2,
........
int start_codeN, int end_codeN, int offsetN, int maskN );
// Specify Unicode value for start_codeN and end_codeN
// Add offsetN to value and take bit-wise 'AND' with maskN,
// then convert value to numeric string reference.
?>
Example #2 convmap example escapes JavaScript string
<?php
function escape_javascript_string($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));
English translation
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Document created the 30/01/2003, last modified the 26/10/2018
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References
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