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@@ -4262,4 +4262,122 @@ function sanitizeMSCutPaste($string)
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return $string;
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}
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+/**
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+ * Decode numeric html entities to their ascii or UTF8 equivalent character.
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+ *
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+ * Callback function for preg_replace_callback in subs-members
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+ * Uses capture group 2 in the supplied array
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+ * Does basic scan to ensure characters are inside a valid range
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+ *
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+ * @param array $matches
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+ * @return string $string
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+*/
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+function replaceEntities__callback($matches)
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+{
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+ global $context;
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+
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+ if (!isset($matches[2]))
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+ return '';
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+
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+ $num = $matches[2][0] === 'x' ? hexdec(substr($matches[2], 1)) : (int) $matches[2];
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+
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+ // remove left to right / right to left overrides
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+ if ($num === 0x202D || $num === 0x202E)
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+ return '';
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+
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+ // Quote, Ampersand, Apostrophe, Less/Greater Than get html replaced
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+ if (in_array($num, array(0x22, 0x26, 0x27, 0x3C, 0x3E)))
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+ return '&#' . $num . ';';
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+
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+ if (empty($context['utf8']))
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+ {
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+ // no control characters
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+ if ($num < 0x20)
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+ return '';
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+ // text is text
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+ elseif ($num < 0x80)
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+ return chr($num);
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+ // all others get html-ised
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+ else
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+ return '&#' . $matches[2] . ';';
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+ }
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+ else
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+ {
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+ // <0x20 are control characters, 0x20 is a space, > 0x10FFFF is past the end of the utf8 character set
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+ // 0xD800 >= $num <= 0xDFFF are surrogate markers (not valid for utf8 text)
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+ if ($num < 0x20 || $num > 0x10FFFF || ($num >= 0xD800 && $num <= 0xDFFF))
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+ return '';
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+ // <0x80 (or less than 128) are standard ascii characters a-z A-Z 0-9 and puncuation
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+ elseif ($num < 0x80)
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+ return chr($num);
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+ // <0x800 (2048)
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+ elseif ($num < 0x800)
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+ return chr(($num >> 6) + 192) . chr(($num & 63) + 128);
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+ // < 0x10000 (65536)
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+ elseif ($num < 0x10000)
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+ return chr(($num >> 12) + 224) . chr((($num >> 6) & 63) + 128) . chr(($num & 63) + 128);
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+ // <= 0x10FFFF (1114111)
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+ else
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+ return chr(($num >> 18) + 240) . chr((($num >> 12) & 63) + 128) . chr((($num >> 6) & 63) + 128) . chr(($num & 63) + 128);
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+ }
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+}
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+
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+/**
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+ * Converts html entities to utf8 equivalents
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+ *
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+ * Callback function for preg_replace_callback
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+ * Uses capture group 1 in the supplied array
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+ * Does basic checks to keep characters inside a viewable range.
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+ *
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+ * @param array $matches
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+ * @return string $string
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+*/
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+function fixchar__callback($matches)
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+{
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+ if (!isset($matches[1]))
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+ return '';
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+
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+ $num = $matches[1][0] === 'x' ? hexdec(substr($matches[1], 1)) : (int) $matches[1];
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+
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+ // <0x20 are control characters, > 0x10FFFF is past the end of the utf8 character set
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+ // 0xD800 >= $num <= 0xDFFF are surrogate markers (not valid for utf8 text), 0x202D-E are left to right overrides
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+ if ($num < 0x20 || $num > 0x10FFFF || ($num >= 0xD800 && $num <= 0xDFFF) || $num === 0x202D || $num === 0x202E)
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+ return '';
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+ // <0x80 (or less than 128) are standard ascii characters a-z A-Z 0-9 and puncuation
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+ elseif ($num < 0x80)
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+ return chr($num);
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+ // <0x800 (2048)
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+ elseif ($num < 0x800)
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+ return chr(($num >> 6) + 192) . chr(($num & 63) + 128);
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+ // < 0x10000 (65536)
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+ elseif ($num < 0x10000)
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+ return chr(($num >> 12) + 224) . chr((($num >> 6) & 63) + 128) . chr(($num & 63) + 128);
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+ // <= 0x10FFFF (1114111)
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+ else
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+ return chr(($num >> 18) + 240) . chr((($num >> 12) & 63) + 128) . chr((($num >> 6) & 63) + 128) . chr(($num & 63) + 128);
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+}
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+
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+/**
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+ * Strips out invalid html entities, replaces others with html style { codes
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+ *
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+ * Callback function used of preg_replace_callback in smcFunc $ent_checks, for example
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+ * strpos, strlen, substr etc
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+ *
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+ * @param array $matches
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+ * @return string $string
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+*/
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+function entity_fix__callback($matches)
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+{
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+ if (!isset($matches[2]))
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+ return '';
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+
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+ $num = $matches[2][0] === 'x' ? hexdec(substr($matches[2], 1)) : (int) $matches[2];
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+
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+ // we don't allow control characters, characters out of range, byte markers, etc
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+ if ($num < 0x20 || $num > 0x10FFFF || ($num >= 0xD800 && $num <= 0xDFFF) || $num == 0x202D || $num == 0x202E)
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+ return '';
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+ else
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+ return '&#' . $num . ';';
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+}
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+
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?>
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emanuele45