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wp-content
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plugins
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tawkto-live-chat
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upgrades
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base.php
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<?php /** * Base class for upgrades */ abstract class TawkToUpgradeBase { const VERSION = null; /** * Gets current upgrade's release version * * @return string Release version * @throws Exception Release version is not defined. */ public static function get_version() { if ( is_null( static::VERSION ) ) { throw new Exception( 'Subclass must have const VERSION' ); } return static::VERSION; } /** * Upgrade script * * @return void * @throws Exception Subclass has no upgrade implementation. */ public static function upgrade() { throw new Exception( 'Subclass must implement this!' ); } }