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1 | <?php |
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2 | |||
3 | namespace BenTools\SimpleDBAL\Model\Adapter\PDO; |
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4 | |||
5 | use BenTools\SimpleDBAL\Contract\ResultInterface; |
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6 | use BenTools\SimpleDBAL\Model\Exception\DBALException; |
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7 | use IteratorAggregate; |
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8 | use PDO; |
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9 | use PDOStatement; |
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10 | |||
11 | class Result implements IteratorAggregate, ResultInterface |
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12 | { |
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13 | /** |
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14 | * @var PDO |
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15 | */ |
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16 | private $pdo; |
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17 | |||
18 | /** |
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19 | * @var Statement |
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20 | */ |
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21 | private $stmt; |
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22 | |||
23 | /** |
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24 | * @var array |
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25 | */ |
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26 | private $storage = []; |
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27 | |||
28 | /** |
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29 | * @var bool |
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30 | */ |
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31 | private $storageEnabled = true; |
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32 | |||
33 | /** |
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34 | * Result constructor. |
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35 | * @param PDO $pdo |
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36 | * @param Statement $stmt |
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37 | */ |
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38 | public function __construct(PDO $pdo, PDOStatement $stmt = null) |
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39 | { |
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40 | $this->pdo = $pdo; |
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41 | $this->stmt = $stmt; |
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42 | } |
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43 | |||
44 | /** |
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45 | * @inheritDoc |
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46 | */ |
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47 | public function getLastInsertId() |
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48 | { |
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49 | return $this->pdo->lastInsertId(); |
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50 | } |
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51 | |||
52 | /** |
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53 | * @inheritDoc |
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54 | */ |
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55 | public function count() |
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56 | { |
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57 | return $this->stmt->rowCount(); |
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58 | } |
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59 | |||
60 | /** |
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61 | * @inheritDoc |
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62 | */ |
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63 | public function asArray(): array |
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64 | { |
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65 | if (null === $this->stmt) { |
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66 | throw new DBALException("No \PDOStatement object provided."); |
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67 | } |
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68 | if (!empty($this->storage['row']) || !empty($this->storage['value']) || !empty($this->storage['list']) || !empty($this->storage['yield'])) { |
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69 | $this->stmt->execute(); |
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70 | } |
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71 | if (empty($this->storage['array'])) { |
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72 | if ($this->shouldResetResultset()) { |
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73 | $this->resetResultset(); |
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74 | } |
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75 | |||
76 | $result = $this->stmt->fetchAll(PDO::FETCH_ASSOC); |
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77 | |||
78 | if (true === $this->storageEnabled) { |
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79 | $this->storage['array'] = $result; |
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80 | } |
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81 | |||
82 | return $result; |
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83 | } |
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84 | return $this->storage['array']; |
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85 | } |
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86 | |||
87 | /** |
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88 | * @inheritDoc |
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89 | */ |
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90 | public function asRow(): ?array |
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91 | { |
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92 | if (null === $this->stmt) { |
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93 | throw new DBALException("No \PDOStatement object provided."); |
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94 | } |
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95 | if (empty($this->storage['row'])) { |
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96 | if (isset($this->storage['array'][0])) { |
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97 | $this->storage['row'] = &$this->storage['array'][0]; |
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98 | } else { |
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99 | if ($this->shouldResetResultset()) { |
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100 | $this->resetResultset(); |
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101 | } |
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102 | |||
103 | $result = $this->stmt->fetch(PDO::FETCH_ASSOC) ?: null; |
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104 | |||
105 | if (true === $this->storageEnabled) { |
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106 | $this->storage['row'] = $result; |
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107 | } |
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108 | return $result; |
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109 | } |
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110 | } |
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111 | return $this->storage['row']; |
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112 | } |
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113 | |||
114 | /** |
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115 | * @inheritDoc |
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116 | */ |
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117 | public function asList(): array |
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118 | { |
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119 | if (null === $this->stmt) { |
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120 | throw new DBALException("No \PDOStatement object provided."); |
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121 | } |
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122 | if (empty($this->storage['list'])) { |
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123 | if (!empty($this->storage['array'])) { |
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124 | $this->storage['list'] = array_column($this->storage['array'], array_keys($this->storage['array'][0])[0]); |
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125 | } else { |
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126 | if ($this->shouldResetResultset()) { |
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127 | $this->resetResultset(); |
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128 | } |
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129 | |||
130 | $generator = function (\PDOStatement $stmt) { |
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131 | while ($value = $stmt->fetchColumn(0)) { |
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132 | yield $value; |
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133 | } |
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134 | }; |
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135 | |||
136 | $result = iterator_to_array($generator($this->stmt)); |
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137 | |||
138 | if (true === $this->storageEnabled) { |
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139 | $this->storage['list'] = $result; |
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140 | } |
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141 | |||
142 | return $result; |
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143 | } |
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144 | } |
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145 | return $this->storage['list']; |
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146 | } |
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147 | |||
148 | /** |
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149 | * @inheritDoc |
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150 | */ |
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151 | public function asValue() |
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152 | { |
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153 | if (null === $this->stmt) { |
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154 | throw new DBALException("No \PDOStatement object provided."); |
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155 | } |
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156 | if (empty($this->storage['value'])) { |
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157 | if (!empty($this->storage['list'][0])) { |
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158 | $this->storage['value'] = $this->storage['list'][0]; |
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159 | } elseif (!empty($this->storage['row'])) { |
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160 | $this->storage['value'] = array_values($this->storage['row'])[0]; |
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161 | } elseif (!empty($this->storage['array'])) { |
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162 | $this->storage['value'] = array_values($this->storage['array'][0])[0]; |
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163 | } else { |
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164 | if ($this->shouldResetResultset()) { |
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165 | $this->resetResultset(); |
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166 | } |
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167 | |||
168 | $result = $this->stmt->fetchColumn(0) ?: null; |
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169 | |||
170 | if (true === $this->storageEnabled) { |
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171 | $this->storage['value'] = $result; |
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172 | } |
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173 | |||
174 | return $result; |
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175 | } |
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176 | } |
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177 | return $this->storage['value']; |
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178 | } |
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179 | |||
180 | |||
181 | /** |
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182 | * @inheritDoc |
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183 | */ |
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184 | public function getIterator() |
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185 | { |
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186 | if (null === $this->stmt) { |
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187 | throw new DBALException("No \PDOStatement object provided."); |
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188 | } |
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189 | |||
190 | // If asArray() was called earlier, iterate over the stored resultset. |
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191 | if (!empty($this->storage['array'])) { |
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192 | foreach ($this->storage['array'] as $key => $value) { |
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193 | yield $key => $value; |
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194 | } |
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195 | } else { |
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196 | $wrappedStmt = $this->stmt; |
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197 | |||
198 | if ($this->shouldResetResultset()) { |
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199 | $this->resetResultset(); |
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200 | } |
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201 | |||
202 | while ($row = $wrappedStmt->fetch(PDO::FETCH_ASSOC)) { |
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203 | if (empty($this->storage['yield'])) { |
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204 | $this->storage['yield'] = true; |
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205 | } |
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206 | yield $row; |
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207 | } |
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208 | } |
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209 | } |
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210 | |||
211 | /** |
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212 | * If asRow(), asList() or asValue() was called earlier, the iterator may be incomplete. |
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213 | * In such case we need to rewind the iterator by executing the statement a second time. |
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214 | * You should avoid to call getIterator() and asRow(), etc. with the same resultset. |
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215 | * |
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216 | * @return bool |
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217 | */ |
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218 | private function shouldResetResultset(): bool |
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219 | { |
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220 | return !empty($this->storage['row']) || !empty($this->storage['value']) || !empty($this->storage['list']) || !empty($this->storage['yield']); |
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221 | } |
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222 | |||
223 | /** |
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224 | * Reset the resultset. |
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225 | */ |
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226 | private function resetResultset() |
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227 | { |
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228 | $this->stmt->execute(); |
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229 | } |
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230 | |||
231 | /** |
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232 | * @return ResultInterface |
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233 | */ |
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234 | public function withoutStorage(): ResultInterface |
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235 | { |
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236 | $clone = clone $this; |
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237 | $clone->storage = []; |
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238 | $clone->storageEnabled = false; |
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239 | return $clone; |
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240 | } |
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241 | } |
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242 |
Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly.
For example, imagine you have a variable
$accountId
that can either hold an Id object or false (if there is no account id yet). Your code now assigns that value to theid
property of an instance of theAccount
class. This class holds a proper account, so the id value must no longer be false.Either this assignment is in error or a type check should be added for that assignment.