| 1 | <?php  | 
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| 12 | trait CollectionAssertTrait  | 
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| 13 | { | 
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| 14 | /**  | 
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| 15 | * Perform a length assertion.  | 
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| 16 | *  | 
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| 17 | * @param string|array|Countable $countable  | 
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| 18 | * @param $length  | 
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| 19 | * @param string $message  | 
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| 20 | */  | 
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| 21 | public function lengthOf($countable, $length, $message = "")  | 
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| 26 | |||
| 27 | /**  | 
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| 28 | * Perform an inclusion assertion.  | 
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| 29 | *  | 
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| 30 | * @param array|string $haystack  | 
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| 31 | * @param mixed $needle  | 
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| 32 | * @param string $message  | 
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| 33 | */  | 
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| 34 | public function isIncluded($haystack, $needle, $message = "")  | 
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| 39 | |||
| 40 | /**  | 
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| 41 | * Perform a negated inclusion assertion.  | 
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| 42 | *  | 
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| 43 | * @param array|string $haystack  | 
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| 44 | * @param mixed $needle  | 
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| 45 | * @param string $message  | 
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| 46 | */  | 
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| 47 | public function notInclude($haystack, $needle, $message = "")  | 
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| 52 | }  | 
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| 53 | 
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: