mb_decode_numericentity

(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)

mb_decode_numericentity — Decode HTML numeric string reference to character

Descrizione

mb_decode_numericentity(string $string, array $map, ?string $encoding = null): string

Convert numeric string reference of string string in a specified block to character.

Elenco dei parametri

string: The string being decoded.
map: map is an array that specifies the code area to convert.
encoding: Il parametro encoding è la codifica dei caratteri. Se è omesso, verrà utilizzata la codifica interna.
is_hex: This parameter is not used.

Valori restituiti

The converted string.

Log delle modifiche

Versione	Descrizione
8.0.0	`encoding` is nullable now.

Esempi

Example #1 map 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 map 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));

Vedere anche:

mb_encode_numericentity() - Encode character to HTML numeric string reference

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User Contributed Notes 4 notes

down

abderrahmanekaddour dot aissat at gmail dot com ¶

2 years ago

<?php

// the following documentation depending on understanding of the code source of php mbr
// first in order to optimise the work of php
// the string must contain "&" or else php won't bother trying to decode.
// for the map : int start_codeN, int end_codeN, int offsetN, int maskN
// the entity must be in the range [start_codeN, end_codeN] , if the entity is greater or less
// mb_decode_numericentity will ignore the decode process and return the $string as it is.
// in the late version of php, $map : "must have a multiple of 4 elements"

$map = [ 0x0, 0xFFFF, 0, 0];
echo mb_decode_numericentity('&#109;', $map ); // result "m"
// if offsetN = 1 result "l" ; the more you increase the decimal the more it use OR operrand.
$map_2 = [ 0x0, 0xFFFF, 60, 0];
echo mb_decode_numericentity('&#109;', $map_2 ); // decode ( &#49; ) result : "1"

// entity Reference to check the result : https://cs.stanford.edu/people/miles/iso8859.html#ISO

?>

down

donovan at conduit it ¶

18 years ago

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.

down

dev at glossword info ¶

21 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('&#8217; &#7936; &#226;');
print my_character2numeric(' ? ? ');

down

-2

fernandosilveira at yahoo dot com dot br ¶

4 years ago

Be careful! 
In addition to translate numeric entities to chars on specified target encoding, this function encodes every character from input string to the specified target encodin, even if the characters are outside the range defined by the conversion map.

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