/**
* Finds first occurrence of 8bit data in the string
*
* Function finds first 8bit symbol or html entity that represents 8bit character.
* Search start is defined by $offset argument. Search ends at $maxlength position.
* If $maxlength is not defined or bigger than provided string, search ends when
* string ends.
*
* Check returned data type in order to avoid confusion between bool(false)
* (not found) and int(0) (first char in the string).
* @param string $haystack
* @param integer $offset
* @param integer $maxlength
* @return mixed integer with first 8bit character position or boolean false
* @since 1.5.2 and 1.4.7
*/
function sq_strpos_8bit($haystack, $offset = 0, $maxlength = false)
{
$ret = false;
if ($maxlength === false || strlen($haystack) < $maxlength) {
$maxlength = strlen($haystack);
}
for ($i = $offset; $i < $maxlength; $i++) {
/* rh7-8 compatibility. don't use full 8bit range in regexp */
if (preg_match('/[\\200-\\237]|\\240|[\\241-\\377]/', $haystack[$i])) {
/* we have 8bit char. stop here and return position */
$ret = $i;
break;
} elseif ($haystack[$i] == '&') {
$substring = substr($haystack, $i);
/**
* 1. look for "&#(decimal number);" where decimal_number is bigger than 127
* 2. look for "&x(hexadecimal number);", where hex number is bigger than x7f
* 3. look for any html character entity that is not 7bit html special char. Use
* own sq_get_html_translation_table() function with 'utf-8' character set in
* order to get all html entities.
*/
if (preg_match('/^&#(\\d+);/', $substring, $match) && $match[1] > 127 || preg_match('/^&x([0-9a-f]+);/i', $substring, $match) && $match[1] > "" || preg_match('/^&([a-z]+);/i', $substring, $match) && !in_array($match[0], get_html_translation_table(HTML_SPECIALCHARS)) && in_array($match[0], sq_get_html_translation_table(HTML_ENTITIES, ENT_COMPAT, 'utf-8'))) {
$ret = $i;
break;
}
}
}
return $ret;
}
/**
* sq_htmlentities
*
* Convert all applicable characters to HTML entities.
* Minimal php requirement - v.4.0.5
*
* @param string $string string that has to be sanitized
* @param integer $quote_style quote encoding style. Possible values (without quotes):
* <ul>
* <li>ENT_COMPAT - (default) encode double quotes</li>
* <li>ENT_NOQUOTES - don't encode double or single quotes</li>
* <li>ENT_QUOTES - encode double and single quotes</li>
* </ul>
* @param string $charset charset used for encoding. defaults to 'us-ascii', 'auto' uses $default_charset global value.
* @return string sanitized string
*/
function sq_htmlentities($string, $quote_style = ENT_COMPAT, $charset = 'us-ascii')
{
// get translation table
$sq_html_ent_table = sq_get_html_translation_table(HTML_ENTITIES, $quote_style, $charset);
// convert characters
return str_replace(array_keys($sq_html_ent_table), array_values($sq_html_ent_table), $string);
}
