function autoLocale($headerLocale)
{
// Default if browser does not send HTTP_ACCEPT_LANGUAGE
- $attempts = array('en_US');
+ $attempts = array('en_US', 'en_US.utf8', 'en_US.UTF-8');
if (isset($headerLocale)) {
// (It's a bit crude, but it works very well. Preferred language is always presented first.)
- if (preg_match('/([a-z]{2})-?([a-z]{2})?/i', $headerLocale, $matches)) {
- $loc = $matches[1] . (!empty($matches[2]) ? '_' . strtoupper($matches[2]) : '');
- $attempts = array(
- $loc.'.UTF-8', $loc, str_replace('_', '-', $loc).'.UTF-8', str_replace('_', '-', $loc),
- $loc . '_' . strtoupper($loc).'.UTF-8', $loc . '_' . strtoupper($loc),
- $loc . '_' . $loc.'.UTF-8', $loc . '_' . $loc, $loc . '-' . strtoupper($loc).'.UTF-8',
- $loc . '-' . strtoupper($loc), $loc . '-' . $loc.'.UTF-8', $loc . '-' . $loc
- );
+ if (preg_match('/([a-z]{2,3})[-_]?([a-z]{2})?/i', $headerLocale, $matches)) {
+ $first = [strtolower($matches[1]), strtoupper($matches[1])];
+ $separators = ['_', '-'];
+ $encodings = ['utf8', 'UTF-8'];
+ if (!empty($matches[2])) {
+ $second = [strtoupper($matches[2]), strtolower($matches[2])];
+ $attempts = cartesian_product_generator([$first, $separators, $second, ['.'], $encodings]);
+ } else {
+ $attempts = cartesian_product_generator([$first, $separators, $first, ['.'], $encodings]);
+ }
+ }
+ }
+ setlocale(LC_ALL, implode('implode', iterator_to_array($attempts)));
+}
+
+/**
+ * Build a Generator object representing the cartesian product from given $items.
+ *
+ * Example:
+ * [['a'], ['b', 'c']]
+ * will generate:
+ * [
+ * ['a', 'b'],
+ * ['a', 'c'],
+ * ]
+ *
+ * @param array $items array of array of string
+ *
+ * @return Generator representing the cartesian product of given array.
+ *
+ * @see https://en.wikipedia.org/wiki/Cartesian_product
+ */
+function cartesian_product_generator($items)
+{
+ if (empty($items)) {
+ yield [];
+ }
+ $subArray = array_pop($items);
+ if (empty($subArray)) {
+ return;
+ }
+ foreach (cartesian_product_generator($items) as $item) {
+ foreach ($subArray as $value) {
+ yield $item + [count($item) => $value];
}
}
- setlocale(LC_ALL, $attempts);
}
/**
{
return preg_replace('/\s{2,}/', ' ', trim($string));
}
+
+/**
+ * Format the date according to the locale.
+ *
+ * Requires php-intl to display international datetimes,
+ * otherwise default format '%c' will be returned.
+ *
+ * @param DateTime $date to format.
+ * @param bool $intl Use international format if true.
+ *
+ * @return bool|string Formatted date, or false if the input is invalid.
+ */
+function format_date($date, $intl = true)
+{
+ if (! $date instanceof DateTime) {
+ return false;
+ }
+
+ if (! $intl || ! class_exists('IntlDateFormatter')) {
+ return strftime('%c', $date->getTimestamp());
+ }
+
+ $formatter = new IntlDateFormatter(
+ setlocale(LC_TIME, 0),
+ IntlDateFormatter::LONG,
+ IntlDateFormatter::LONG
+ );
+
+ return $formatter->format($date);
+}