wikimedia / mediawiki

	 * @param int $namespace Namespace of the title

	 * @return string DBkey (no namespace prefix)

	 */

	public function titlePartToKey( $titlePart, $namespace = NS_MAIN ) {

		$t = Title::makeTitleSafe( $namespace, $titlePart . 'x' );

		if ( !$t || $t->hasFragment() ) {

			// Invalid title (e.g. bad chars) or contained a '#'.

			$this->dieUsageMsg( [ 'invalidtitle', $titlePart ] );

		}

		if ( $namespace != $t->getNamespace() || $t->isExternal() ) {

			// This can happen in two cases. First, if you call titlePartToKey with a title part

			// that looks like a namespace, but with $defaultNamespace = NS_MAIN. It would be very

			// difficult to handle such a case. Such cases cannot exist and are therefore treated

			// as invalid user input. The second case is when somebody specifies a title interwiki

			// prefix.

			$this->dieUsageMsg( [ 'invalidtitle', $titlePart ] );

		}

		return substr( $t->getDBkey(), 0, -1 );

	}

	/**

	 * Convert an input title or title prefix into a namespace constant and dbkey.

	 * @param int $defaultNamespace Default namespace if none is given

	 * @return array (int, string) Namespace number and DBkey

	 */

	public function prefixedTitlePartToKey( $titlePart, $defaultNamespace = NS_MAIN ) {

		$t = Title::newFromText( $titlePart . 'x', $defaultNamespace );

		if ( !$t || $t->hasFragment() || $t->isExternal() ) {

			// Invalid title (e.g. bad chars) or contained a '#'.

			$this->dieUsageMsg( [ 'invalidtitle', $titlePart ] );

		}

		return [ $t->getNamespace(), substr( $t->getDBkey(), 0, -1 ) ];

	}

	/**

	 * @param string $hash