| Conditions | 7 | 
| Paths | 20 | 
| Total Lines | 59 | 
| Code Lines | 25 | 
| Lines | 0 | 
| Ratio | 0 % | 
| Changes | 0 | ||
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
| 1 | <?php declare(strict_types=1); | ||
| 68 | public function backupData($exclude=[], $systemTables=FALSE) | ||
| 69 | 	{ | ||
| 70 | // Determine which tables to use | ||
| 71 | $tables = $this->getDriver()->getTables(); | ||
| 72 | if($systemTables == TRUE) | ||
| 73 | 		{ | ||
| 74 | $tables = array_merge($tables, $this->getDriver()->getSystemTables()); | ||
| 75 | } | ||
| 76 | |||
| 77 | // Filter out the tables you don't want | ||
| 78 | if( ! empty($exclude)) | ||
| 79 | 		{ | ||
| 80 | $tables = array_diff($tables, $exclude); | ||
| 81 | } | ||
| 82 | |||
| 83 | $outputSql = ''; | ||
| 84 | |||
| 85 | // Get the data for each object | ||
| 86 | foreach($tables as $t) | ||
| 87 | 		{ | ||
| 88 | $sql = 'SELECT * FROM "'.trim($t).'"'; | ||
| 89 | $res = $this->getDriver()->query($sql); | ||
| 90 | $objRes = $res->fetchAll(PDO::FETCH_ASSOC); | ||
| 91 | |||
| 92 | // Don't add to the file if the table is empty | ||
| 93 | if (count($objRes) < 1) | ||
| 94 | 			{ | ||
| 95 | continue; | ||
| 96 | } | ||
| 97 | |||
| 98 | // Nab the column names by getting the keys of the first row | ||
| 99 | $columns = @array_keys($objRes[0]); | ||
| 100 | |||
| 101 | $insertRows = []; | ||
| 102 | |||
| 103 | // Create the insert statements | ||
| 104 | foreach($objRes as $row) | ||
| 105 | 			{ | ||
| 106 | $row = array_values($row); | ||
| 107 | |||
| 108 | // Quote values as needed by type | ||
| 109 | if(stripos($t, 'RDB$') === FALSE) | ||
| 110 | 				{ | ||
| 111 | $row = array_map([$this->getDriver(), 'quote'], $row); | ||
| 112 | 					$row = array_map('trim', $row); | ||
| 113 | } | ||
| 114 | |||
| 115 | 				$rowString = 'INSERT INTO "'.trim($t).'" ("'.implode('","', $columns).'") VALUES ('.implode(',', $row).');'; | ||
| 116 | |||
| 117 | $row = NULL; | ||
| 118 | |||
| 119 | $insertRows[] = $rowString; | ||
| 120 | } | ||
| 121 | |||
| 122 | 			$outputSql .= "\n\nSET TRANSACTION;\n".implode("\n", $insertRows)."\nCOMMIT;"; | ||
| 123 | } | ||
| 124 | |||
| 125 | return $outputSql; | ||
| 126 | } | ||
| 127 | } | 
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: