1 | <?php |
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14 | class MobileHash implements QueryInterface |
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15 | { |
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16 | /** @var string user phone number */ |
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17 | private $phone; |
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18 | |||
19 | /** @var string user personal code */ |
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20 | private $code; |
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21 | |||
22 | /** @var string Hash to sign */ |
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23 | private $hash; |
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24 | |||
25 | /** @var string Hash algorithm */ |
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26 | private $hashAlgorithm; |
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27 | |||
28 | /** @var string Signature encryption type. */ |
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29 | private $encryption; |
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30 | |||
31 | /** @var string Message displayed on the phone screen. Attention: UTF-8 symbols are not allowed */ |
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32 | private $message; |
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33 | |||
34 | /** @var string Language for messages displayed on the phone screen */ |
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35 | private $language; |
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36 | |||
37 | /** |
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38 | * @param string $phone |
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39 | * @param string $code |
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40 | * @param string $hash |
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41 | * @param string $hashAlgorithm |
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42 | * @param string $encryption |
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43 | * @param string $message |
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44 | * @param string $language |
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45 | */ |
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46 | 5 | public function __construct( |
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63 | |||
64 | /** |
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65 | * Field and values association used in query |
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66 | * @return array |
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67 | */ |
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68 | 1 | public function getFields() |
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80 | |||
81 | /** |
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82 | * Validation constraints for request data validation |
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83 | * @return Assert\Collection |
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84 | */ |
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85 | 1 | public function getValidationConstraints() |
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86 | { |
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87 | 1 | return new Assert\Collection([ |
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88 | 1 | 'phone' => new Assert\Required([ |
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89 | 1 | new Assert\NotBlank(), |
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90 | 1 | new Phone(), |
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91 | 1 | ]), |
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92 | 1 | 'code' => new Assert\Required([ |
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93 | 1 | new Assert\NotBlank(), |
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94 | 1 | new Code() |
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95 | 1 | ]), |
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96 | 1 | 'hash' => new Assert\NotBlank(), |
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97 | 1 | 'hash_algorithm' => new Assert\NotBlank(), |
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98 | 1 | 'encryption' => new Assert\NotBlank(), |
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99 | 1 | 'message' => new Assert\NotBlank(), |
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100 | 1 | 'language' => new Assert\NotBlank(), |
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101 | 1 | ]); |
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102 | } |
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103 | |||
104 | /** |
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105 | * Result object for this query result |
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106 | * @return MobileHashResult |
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107 | */ |
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108 | 1 | public function createResult() |
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112 | |||
113 | /** |
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114 | * API action name, part of full API request url |
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115 | * @return string |
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116 | */ |
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117 | 1 | public function getAction() |
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121 | |||
122 | /** |
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123 | * HTTP method to use |
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124 | * @return string |
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125 | */ |
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126 | 1 | public function getMethod() |
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130 | } |
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131 |
If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.
Let’s take a look at an example:
Our function
my_function
expects aPost
object, and outputs the author of the post. The base classPost
returns a simple string and outputting a simple string will work just fine. However, the child classBlogPost
which is a sub-type ofPost
instead decided to return anobject
, and is therefore violating the SOLID principles. If aBlogPost
were passed tomy_function
, PHP would not complain, but ultimately fail when executing thestrtoupper
call in its body.