| 1 | <?php |
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| 12 | trait ArrayTrait |
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| 13 | { |
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| 14 | /** |
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| 15 | * Performs an operation in a given array. |
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| 16 | * It stops if 'strict' is set to true and the result of the operation is false. |
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| 17 | * |
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| 18 | * @param array $values The array |
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| 19 | * @param mixed $args The arguments to pass to the operation |
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| 20 | * @param callable $do The operation |
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| 21 | * |
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| 22 | * @return bool |
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| 23 | */ |
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| 24 | public function inArray($values, $args, $do, $strict = false) |
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| 39 | |||
| 40 | /** |
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| 41 | * Eliminate nested array when passing parameters. |
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| 42 | * |
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| 43 | * @param array $value The array to eliminate layer up |
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| 44 | * |
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| 45 | * @return array |
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| 46 | */ |
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| 47 | protected function toArray($value) |
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| 55 | } |
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| 56 |
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: