SmartFormatPlural.php

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<?php
namespace MediaWiki\Extension\Translate\Utilities;
 
class SmartFormatPlural {
    public static function getPluralInstances( string $text ): array {
        // ldns = Large Deeply-Nested Structure
        $ldns = [];
 
        // Named variables seem to be supported by the spec, but we limit ourselves
        // only to numbers. Example syntax {0:message|messages}
        $regex = '/\{(\d+):([^}]+)\}/Us';
        $matches = [];
        preg_match_all( $regex, $text, $matches, PREG_SET_ORDER );
 
        foreach ( $matches as $instance ) {
            $original = $instance[ 0 ];
            $variable = $instance[ 1 ];
            $forms = explode( '|', $instance[ 2 ] );
            $ldns[ $variable ] = $ldns[ $variable ] ?? [];
            $ldns[ $variable ][] = [
                'forms' => $forms,
                'original' => $original,
            ];
        }
 
        return $ldns;
    }
}