Determines if the date should be declined.
Description
If the locale specifies that month names require a genitive case in certain formats (like ‘j F Y’), the month name will be replaced with a correct form.
Parameters
$datestringrequired- Formatted date string.
$formatstringoptional- Date format to check.
Default:
''
Source
function wp_maybe_decline_date( $date, $format = '' ) { global $wp_locale; // i18n functions are not available in SHORTINIT mode. if ( ! function_exists( '_x' ) ) { return $date; } /* * translators: If months in your language require a genitive case, * translate this to 'on'. Do not translate into your own language. */ if ( 'on' === _x( 'off', 'decline months names: on or off' ) ) { $months = $wp_locale->month; $months_genitive = $wp_locale->month_genitive; /* * Match a format like 'j F Y' or 'j. F' (day of the month, followed by month name) * and decline the month. */ if ( $format ) { $decline = preg_match( '#[dj]\.? F#', $format ); } else { // If the format is not passed, try to guess it from the date string. $decline = preg_match( '#\b\d{1,2}\.? [^\d ]+\b#u', $date ); } if ( $decline ) { foreach ( $months as $key => $month ) { $months[ $key ] = '# ' . preg_quote( $month, '#' ) . '\b#u'; } foreach ( $months_genitive as $key => $month ) { $months_genitive[ $key ] = ' ' . $month; } $date = preg_replace( $months, $months_genitive, $date ); } /* * Match a format like 'F jS' or 'F j' (month name, followed by day with an optional ordinal suffix) * and change it to declined 'j F'. */ if ( $format ) { $decline = preg_match( '#F [dj]#', $format ); } else { // If the format is not passed, try to guess it from the date string. $decline = preg_match( '#\b[^\d ]+ \d{1,2}(st|nd|rd|th)?\b#u', trim( $date ) ); } if ( $decline ) { foreach ( $months as $key => $month ) { $months[ $key ] = '#\b' . preg_quote( $month, '#' ) . ' (\d{1,2})(st|nd|rd|th)?([-–]\d{1,2})?(st|nd|rd|th)?\b#u'; } foreach ( $months_genitive as $key => $month ) { $months_genitive[ $key ] = '$1$3 ' . $month; } $date = preg_replace( $months, $months_genitive, $date ); } } // Used for locale-specific rules. $locale = get_locale(); if ( 'ca' === $locale ) { // " de abril| de agost| de octubre..." -> " d'abril| d'agost| d'octubre..." $date = preg_replace( '# de ([ao])#i', " d'\\1", $date ); } return $date; }
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