| 1 | <?php |
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| 11 | trait Join |
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| 12 | { |
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| 13 | /** |
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| 14 | * Join array elements with a string |
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| 15 | * |
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| 16 | * @param string $glue |
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| 17 | * |
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| 18 | * @return string Returns a string containing a string representation of all the array elements in the same order, |
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| 19 | * with the glue string between each element. |
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| 20 | */ |
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| 21 | 1 | public function join($glue = '') |
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| 25 | } |
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| 26 |
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: