Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php  | 
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| 17 | class Jetpack_Sync_Debug_Helper { | 
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| 18 | const API_BASE = 'jetpack_debugger_api_base';  | 
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| 19 | const LAST_SYNC_ERROR = 'jetpack_debugger_last_sync_error';  | 
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| 20 | |||
| 21 | /**  | 
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| 22 | * Saved error  | 
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| 23 | *  | 
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| 24 | * @var boolean  | 
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| 25 | */  | 
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| 26 | public static $saved_error = false;  | 
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| 27 | |||
| 28 | /**  | 
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| 29 | * Init hooks  | 
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| 30 | *  | 
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| 31 | * @return void  | 
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| 32 | */  | 
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| 33 | 	public static function init() { | 
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| 39 | |||
| 40 | /**  | 
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| 41 | * Deactivation hook  | 
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| 42 | */  | 
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| 43 | 	public static function deactivate() { | 
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| 47 | |||
| 48 | /**  | 
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| 49 | * Pre send  | 
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| 50 | *  | 
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| 51 | * @param array $data The action buffer.  | 
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| 52 | * @param string $codec_name The codec name used to encode the data.  | 
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| 53 | * @param double $sent_timestamp The current time.  | 
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| 54 | 	 * @param string $queue_id The queue used to send ('sync' or 'full_sync'). | 
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| 55 | * @return array  | 
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| 56 | */  | 
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| 57 | 	public static function pre_send( $data, $codec_name, $sent_timestamp, $queue_id ) { | 
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| 73 | |||
| 74 | /**  | 
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| 75 | * Pre send  | 
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| 76 | *  | 
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| 77 | * @param array $data The action buffer.  | 
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| 78 | * @param string $codec_name The codec name used to encode the data.  | 
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| 79 | * @param double $sent_timestamp The current time.  | 
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| 80 | 	 * @param string $queue_id The queue used to send ('sync' or 'full_sync'). | 
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| 81 | * @return array  | 
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| 82 | */  | 
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| 83 | 	public static function store_sync_error( $data, $codec_name, $sent_timestamp, $queue_id ) { | 
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| 108 | |||
| 109 | /**  | 
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| 110 | * Whitelist synced options  | 
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| 111 | *  | 
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| 112 | * @param array $options options.  | 
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| 113 | * @return array  | 
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| 114 | */  | 
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| 115 | 	public static function whitelist_options( $options ) { | 
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| 124 | |||
| 125 | }  | 
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| 126 | |||
| 127 |