Complex classes like Generator often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Generator, and based on these observations, apply Extract Interface, too.
1 | <?php |
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5 | class Generator |
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6 | { |
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7 | /** Single quote for string value **/ |
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8 | const QUOTE_SINGLE = "'"; |
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9 | |||
10 | /** Double quote for string value **/ |
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11 | const QUOTE_DOUBLE = '"'; |
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12 | |||
13 | /** @var string Generated code */ |
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14 | public $code = ''; |
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15 | |||
16 | /** @var integer Level of code line tabbing for new lines */ |
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17 | public $tabs = 0; |
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18 | |||
19 | /** @var string Current class name */ |
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20 | public $class; |
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21 | |||
22 | /** @var int Current conditions nesting level */ |
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23 | public $ifConditionLevel = 0; |
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24 | |||
25 | /** |
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26 | * Add simple text to current code position |
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27 | * @param string $text Text to add |
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28 | * @return self |
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29 | */ |
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30 | public function text($text = '') |
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31 | { |
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32 | $this->code .= $text; |
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33 | |||
34 | return $this; |
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35 | } |
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36 | |||
37 | /** |
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38 | * Add current tabbing level to current line. |
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39 | * |
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40 | * @param string $endText Text to add after tabs |
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41 | * @param integer $tabs Amount of tabs to add |
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42 | * @param string $startText Text to add before tabs |
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43 | * @return Generator Chaining |
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44 | */ |
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45 | public function tabs($endText = '', $tabs = null, $startText = '') |
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46 | { |
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47 | // Generate tabs array |
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48 | $tabs = isset($tabs) && $tabs ? array_fill(0, $tabs, "\t") : array(); |
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49 | |||
50 | // Add necessary amount of tabs to line and append text |
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51 | $this->text($startText.implode('', $tabs) . $endText); |
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52 | |||
53 | return $this; |
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54 | } |
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55 | |||
56 | /** |
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57 | * Add new line to code. |
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58 | * |
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59 | * @param string $text Code to add to new line |
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60 | * @param integer $tabs Tabs count |
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61 | * @return self |
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62 | */ |
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63 | public function newLine($text = '', $tabs = null) |
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64 | { |
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65 | // If no tabs count is specified set default tabs |
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66 | if (!isset($tabs)) { |
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67 | $tabs = $this->tabs; |
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68 | } |
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69 | |||
70 | return $this->tabs($text, $tabs, "\n"); |
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71 | } |
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72 | |||
73 | /** |
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74 | * Add single line comment to code |
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75 | * @param string $text Comment text |
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76 | * @return self Chaining |
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77 | */ |
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78 | public function comment($text = '') |
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82 | |||
83 | /** |
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84 | * Add multi-line comment. If array with one line is passed |
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85 | * we create special syntax comment in one line, usually |
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86 | * used for class variable definition in more compact form. |
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87 | * |
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88 | * @param array $lines Array of comments lines |
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89 | * @return self Chaining |
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90 | */ |
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91 | public function multiComment(array $lines = array()) |
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92 | { |
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93 | // If array is not empty |
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94 | if (sizeof($lines)) { |
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95 | $this->newLine("/**"); |
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96 | |||
97 | // Multi-comment with single line |
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98 | if (sizeof($lines) === 1) { |
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99 | $this->text(' '.$lines[0].' */'); |
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100 | } else { // Iterate comments lines and if comment line is not empty |
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101 | foreach ($lines as $line) { |
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102 | if (isset($line{0})) { |
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103 | $this->newLine(" * " . $line); |
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104 | } |
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105 | } |
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106 | |||
107 | return $this->newLine(" */"); |
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108 | } |
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109 | |||
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110 | } |
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111 | |||
112 | return $this; |
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113 | } |
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114 | |||
115 | /** |
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116 | * Add one line variable definition comment. |
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117 | * |
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118 | * @param string $type Variable type |
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119 | * @param string $description Variable description |
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120 | * @param string $name Variable name |
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121 | * @return self Chaining |
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122 | */ |
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123 | public function commentVar($type, $description, $name = '') |
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124 | { |
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125 | return $this->multiComment(array( |
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126 | '@var ' . trim($type) . (isset($name) ? trim($name) . ' ' : ' ') . trim($description) |
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127 | )); |
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128 | } |
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129 | |||
130 | /** |
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131 | * Add string value definition. |
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132 | * |
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133 | * @param string $value String value to add |
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134 | * @param string $tabs Tabs count |
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135 | * @param string $quote Type of quote |
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136 | * @return self Chaining |
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137 | */ |
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138 | public function stringValue($value, $tabs = null, $quote = self::QUOTE_SINGLE) |
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142 | |||
143 | /** |
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144 | * Add array values definition. |
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145 | * |
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146 | * @param array $items Array key-value pairs collection |
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147 | * @return self Chaining |
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148 | */ |
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149 | public function arrayValue(array $items = array()) |
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176 | |||
177 | /** |
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178 | * Add variable definition with array merging. |
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179 | * |
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180 | * @param string $name Variable name |
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181 | * @param array $value Array of key-value items for merging it to other array |
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182 | * @param string $arrayName Name of array to merge to, if no is specified - $name is used |
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183 | * @return self Chaining |
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184 | */ |
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185 | public function defArrayMerge($name, array $value, $arrayName = null) |
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194 | |||
195 | /** |
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196 | * Add variable definition. |
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197 | * |
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198 | * @param string $name Variable name |
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199 | * @param mixed $value Variable default value |
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200 | * @param string $after String to insert after variable definition |
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201 | * @param string $end Closing part of variable definition |
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202 | * @param string $quote Type of quote |
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203 | * @return Generator Chaining |
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204 | */ |
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205 | public function defVar($name, $value = null, $after = ' = ', $end = ';', $quote = self::QUOTE_SINGLE) |
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232 | |||
233 | /** |
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234 | * Add trait definition. |
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235 | * |
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236 | * @param string $name Trait name |
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237 | * @return self Chaining |
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238 | */ |
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239 | public function defTrait($name) |
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259 | |||
260 | /** |
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261 | * Add class definition. |
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262 | * |
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263 | * @param string $name Class name |
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264 | * @param string $extends Parent class name |
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265 | * @param array $implements Interfaces names collection |
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266 | * @return self Chaining |
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267 | */ |
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268 | public function defClass($name, $extends = null, array $implements = array()) |
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298 | |||
299 | /** |
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300 | * Close current class context. |
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301 | * |
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302 | * @return self Chaining |
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303 | */ |
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304 | public function endClass() |
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313 | |||
314 | /** |
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315 | * Define if statement condition. |
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316 | * |
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317 | * @param string $condition Condition statement |
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318 | * @return self Chaining |
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319 | */ |
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320 | public function defIfCondition($condition) |
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329 | |||
330 | /** |
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331 | * Define elseif statement condition. |
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332 | * |
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333 | * @param string $condition Condition statement |
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334 | * @return self Chaining |
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335 | */ |
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336 | public function defElseIfCondition($condition) |
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344 | |||
345 | /** |
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346 | * Define else statement. |
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347 | * |
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348 | * @return self Chaining |
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349 | */ |
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350 | public function defElseCondition() |
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358 | |||
359 | /** |
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360 | * Close if condition statement. |
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361 | * |
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362 | * @return self Chaining |
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363 | */ |
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364 | public function endIfCondition() |
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375 | |||
376 | /** |
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377 | * Add class variable definition. |
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378 | * |
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379 | * @param string $name Variable name |
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380 | * @param string $visibility Variable accessibility level |
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381 | * @param string $value Variable default value |
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382 | * @return self Chaining |
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383 | */ |
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384 | public function defClassVar($name, $visibility = 'public', $value = null) |
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392 | |||
393 | /** |
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394 | * Add class constant definition. |
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395 | * |
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396 | * @param string $name Constant name |
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397 | * @param string $value Variable default value |
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398 | * @return self Chaining |
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399 | */ |
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400 | public function defClassConst($name, $value) |
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404 | |||
405 | /** |
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406 | * Write file to disk |
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407 | * @param string $name Path to file |
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408 | * @param string $format Output file format |
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409 | */ |
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410 | public function write($name, $format = 'php') |
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420 | |||
421 | /** |
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422 | * Flush internal data and return it. |
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423 | * |
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424 | * @return string Current generated code |
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425 | */ |
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426 | public function flush() |
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437 | |||
438 | /** |
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439 | * Add function definition. |
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440 | * |
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441 | * @param string $name Function name |
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442 | * @param array $parameters Collection of parameters $typeHint => $paramName |
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443 | * @return Generator Chaining |
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444 | */ |
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445 | public function defFunction($name, $parameters = array()) |
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462 | |||
463 | /** |
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464 | * Close current function context. |
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465 | * |
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466 | * @return self Chaining |
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467 | */ |
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468 | public function endFunction() |
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474 | |||
475 | /** |
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476 | * Constructor |
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477 | * @param string $namespace Code namespace |
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478 | */ |
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479 | public function __construct($namespace = null) |
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486 | |||
487 | /** |
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488 | * Add namespace declaration |
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489 | * @param string $name Namespace name |
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490 | * @return self |
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491 | */ |
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492 | private function defnamespace($name) |
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496 | } |
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497 | //[PHPCOMPRESSOR(remove,end)] |
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498 |