| private quoteIdentifier ( string $identifier ) : string | ||
| $identifier | string | UTF-8 encoded |
| return | string | quoted identifier |
private function quoteIdentifier($identifier)
{
$quote = '`';
// le backtique
$pattern = '~^(?:[\\x1-\\x7F]|[\\xC2-\\xDF][\\x80-\\xBF]|[\\xE0-\\xEF][\\x80-\\xBF]{2})+$~';
if (!preg_match($pattern, $identifier)) {
throw new InvalidArgumentException(sprintf('Invalid identifier, must not contain NUL and must be UTF-8 encoded in the BMP: %s (hex: %s)', var_export($identifier), bin2hex($identifier)));
}
return $quote . strtr($identifier, array($quote => $quote . $quote)) . $quote;
}