MediaWikiVersionFetcher.php

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<?php
 
class MediaWikiVersionFetcher {
 
    public function fetchVersion() {
        $code = file_get_contents( __DIR__ . '/Defines.php' );
 
        $matches = [];
        preg_match( "/define\‍( 'MW_VERSION', '([0-9a-zA-Z\.\-]+)'/", $code, $matches );
 
        if ( count( $matches ) !== 2 ) {
            throw new RuntimeException( 'Could not extract the MediaWiki version from Defines.php' );
        }
 
        return $matches[1];
    }
 
}