| Conditions | 10 | 
| Paths | 256 | 
| Total Lines | 34 | 
| Code Lines | 19 | 
| Lines | 0 | 
| Ratio | 0 % | 
| Changes | 4 | ||
| Bugs | 0 | Features | 1 | 
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  | 
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| 121 | public function getParameters()  | 
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| 122 |     { | 
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| 123 | $parameters = [  | 
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| 124 | 'ACTIVITE' => $this->activity,  | 
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| 125 |             'DATEQ' => $this->date instanceof \DateTime ? $this->date->format('dmYHis') : null, | 
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| 126 | ];  | 
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| 127 | |||
| 128 |         if ($this->showCountry) { | 
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| 129 | $parameters['PAYS'] = '';  | 
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| 130 | }  | 
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| 131 |         if ($this->showSha1) { | 
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| 132 | $parameters['SHA-1'] = '';  | 
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| 133 | }  | 
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| 134 |         if ($this->showCardType) { | 
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| 135 | $parameters['TYPECARTE'] = '';  | 
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| 136 | }  | 
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| 137 | |||
| 138 |         if (method_exists($this, 'getTransactionNumber')) { | 
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| 139 | $parameters['NUMTRANS'] = $this->getTransactionNumber();  | 
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                         | 
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| 140 | }  | 
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| 141 |         if (method_exists($this, 'getCallNumber')) { | 
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| 142 | $parameters['NUMAPPEL'] = $this->getCallNumber();  | 
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| 143 | }  | 
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| 144 |         if (method_exists($this, 'getAuthorization') && null !== $this->getAuthorization()) { | 
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| 145 | $parameters['AUTORISATION'] = $this->getAuthorization();  | 
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| 146 | }  | 
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| 147 | |||
| 148 | // Direct Plus requests special case.  | 
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| 149 |         if (null !== $this->getSubscriberRef()) { | 
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| 150 | $parameters['REFABONNE'] = $this->getSubscriberRef();  | 
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| 151 | }  | 
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| 152 | |||
| 153 | return $parameters;  | 
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| 154 | }  | 
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| 155 | }  | 
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| 156 | 
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 sub-classes 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 parent class: