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Gettext_Translations::nplurals_and_expression_from_header( string $header )

Parameters

$header

(string) (Required)

Return

(array)

Source

File: wp-includes/pomo/translations.php 

function nplurals_and_expression_from_header( $header ) {
			if ( preg_match( '/^\s*nplurals\s*=\s*(\d+)\s*;\s+plural\s*=\s*(.+)$/', $header, $matches ) ) {
				$nplurals   = (int) $matches[1];
				$expression = trim( $matches[2] );
				return array( $nplurals, $expression );
			} else {
				return array( 2, 'n != 1' );
			}
		}

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/gettext_translations/nplurals_and_expression_from_header