public static unichr ( $code ) |
public static function unichr($code)
{
if ($code > 1114111 or $code < 0 or $code >= 55296 and $code <= 57343) {
// bits are set outside the "valid" range as defined
// by UNICODE 4.1.0
return '';
}
$x = $y = $z = $w = 0;
if ($code < 128) {
// regular ASCII character
$x = $code;
} else {
// set up bits for UTF-8
$x = $code & 63 | 128;
if ($code < 2048) {
$y = ($code & 2047) >> 6 | 192;
} else {
$y = ($code & 4032) >> 6 | 128;
if ($code < 65536) {
$z = $code >> 12 & 15 | 224;
} else {
$z = $code >> 12 & 63 | 128;
$w = $code >> 18 & 7 | 240;
}
}
}
// set up the actual character
$ret = '';
if ($w) {
$ret .= chr($w);
}
if ($z) {
$ret .= chr($z);
}
if ($y) {
$ret .= chr($y);
}
$ret .= chr($x);
return $ret;
}
/** * Callback function for substituteNonSpecialEntities() that does the work. * * @warning Though this is public in order to let the callback happen, * calling it directly is not recommended. * @param $matches PCRE matches array, with 0 the entire match, and * either index 1, 2 or 3 set with a hex value, dec value, * or string (respectively). * @returns Replacement string. */ function nonSpecialEntityCallback($matches) { // replaces all but big five $entity = $matches[0]; $is_num = @$matches[0][1] === '#'; if ($is_num) { $is_hex = @$entity[2] === 'x'; $code = $is_hex ? hexdec($matches[1]) : (int) $matches[2]; // abort for special characters if (isset($this->_special_dec2str[$code])) { return $entity; } return HTMLPurifier_Encoder::unichr($code); } else { if (isset($this->_special_ent2dec[$matches[3]])) { return $entity; } if (!$this->_entity_lookup) { $this->_entity_lookup = HTMLPurifier_EntityLookup::instance(); } if (isset($this->_entity_lookup->table[$matches[3]])) { return $this->_entity_lookup->table[$matches[3]]; } else { return $entity; } } }