Detect whether a string contains non-ascii multibyte sequences in the UTF-8 range
| static public utf8_is_valid ( $str ) : boolean | ||
| $str | string input string | |
| return | boolean | |
/**
* Sanitize a variable.
* Removes leading and trailing whitespace, normalizes all characters to UTF-8.
* @param $var string
* @return string
*/
static function cleanVar($var)
{
// only normalize strings that are not UTF-8 already, and when the system is using UTF-8
if (Config::getVar('i18n', 'charset_normalization') == 'On' && strtolower_codesafe(Config::getVar('i18n', 'client_charset')) == 'utf-8' && !PKPString::utf8_is_valid($var)) {
$var = PKPString::utf8_normalize($var);
// convert HTML entities into valid UTF-8 characters (do not transcode)
$var = html_entity_decode($var, ENT_COMPAT, 'UTF-8');
// strip any invalid UTF-8 sequences
$var = PKPString::utf8_bad_strip($var);
$var = htmlspecialchars($var, ENT_NOQUOTES, 'UTF-8', false);
}
// strip any invalid ASCII control characters
$var = PKPString::utf8_strip_ascii_ctrl($var);
return trim($var);
}
