1 | <?php |
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8 | class Bindings |
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9 | { |
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10 | |||
11 | /** |
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12 | * An array of all the bindings. |
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13 | * |
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14 | * @var array |
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15 | */ |
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16 | private $bindings = []; |
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17 | |||
18 | /** |
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19 | * Key of the binding that would be altered with subsequent calls to a bindings object. |
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20 | * |
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21 | * @var string |
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22 | */ |
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23 | private $activeKey; |
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24 | |||
25 | /** |
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26 | * Set the key of the binding to be modified or accessed on subsequent calls. |
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27 | * |
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28 | * @param $activeKey |
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29 | * @return self |
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30 | */ |
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31 | 10 | public function setActiveKey(string $activeKey) : self |
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36 | |||
37 | /** |
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38 | * Registers a method to be called when an instance is created for the current active binding. |
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39 | * This method could be a setter or some other optional initialization method. Parameters for methods registered |
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40 | * with call that have type hints are also injected. |
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41 | * |
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42 | * @param string $method |
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43 | * @param array $parameters |
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44 | * @return self |
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45 | */ |
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46 | 3 | public function call(string $method, array $parameters = []) : self |
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51 | |||
52 | /** |
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53 | * Provides a concrete class or factory function to which the currently selected binding should be linked. |
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54 | * |
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55 | * @param mixed $value |
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56 | * @return self |
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57 | */ |
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58 | 12 | public function to($value) |
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67 | |||
68 | public function withArgs(array $args) |
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72 | |||
73 | /** |
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74 | * Get the configuration of a binding. |
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75 | * |
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76 | * @param string $key |
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77 | * @return mixed |
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78 | */ |
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79 | 12 | public function get(string $key) |
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87 | |||
88 | /** |
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89 | * Checks if a binding exists. |
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90 | * |
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91 | * @param string $key |
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92 | * @return bool |
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93 | */ |
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94 | 19 | public function has($key) |
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98 | |||
99 | /** |
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100 | * Register the current active binding as a singleton. |
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101 | * |
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102 | * @param bool $singleton |
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103 | */ |
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104 | 3 | public function asSingleton($singleton = true) |
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108 | |||
109 | /** |
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110 | * Setup bindings from an array. |
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111 | * |
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112 | * @param array $binding |
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113 | */ |
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114 | 2 | private function setArrayBinding(array $binding) |
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137 | |||
138 | /** |
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139 | * Merge current bindings with another configuration overwriting conflicting values with the new bindings. |
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140 | * |
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141 | * @param array $bindings |
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142 | */ |
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143 | 5 | public function merge(array $bindings) |
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154 | |||
155 | } |
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156 |
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: