Total Complexity | 116 |
Total Lines | 732 |
Duplicated Lines | 0 % |
Changes | 0 |
Complex classes like DB 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.
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 DB, and based on these observations, apply Extract Interface, too.
1 | <?php |
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14 | class DB |
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15 | { |
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16 | private static $instance = null; |
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17 | private $dbh = null; |
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18 | private $table; |
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19 | private $columns; |
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20 | private $sql; |
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21 | private $bindValues; |
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22 | private $getSQL; |
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23 | private $where; |
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24 | private $orWhere; |
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25 | private $whereCount = 0; |
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26 | private $isOrWhere = false; |
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27 | private $rowCount = 0; |
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28 | private $limit; |
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29 | private $orderBy; |
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30 | private $lastIDInserted = 0; |
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31 | |||
32 | // Initial values for pagination array |
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33 | private $pagination = ['previousPage' => null, 'currentPage' => 1, 'nextPage' => null, 'lastPage' => null, 'totalRows' => null]; |
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34 | |||
35 | private function __construct($config = ['host' => '', 'database' => '', 'username' => '', 'password' => '']) |
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36 | { |
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37 | try { |
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38 | $this->dbh = new PDO('mysql:host=' . $config['host'] . ';dbname=' . $config['database'] . ';charset=utf8', $config['username'], $config['password']); |
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39 | $this->dbh->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ); |
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40 | } catch (Exception $e) { |
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41 | die('Error establishing a database connection.'); |
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42 | } |
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43 | } |
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44 | |||
45 | public static function getInstance($config = ['host' => '', 'database' => '', 'username' => '', 'password' => '']) |
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46 | { |
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47 | if (!self::$instance) { |
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48 | self::$instance = new DB($config); |
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49 | } |
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50 | |||
51 | return self::$instance; |
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52 | } |
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53 | |||
54 | public function query($query, $args = [], $quick = false) |
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55 | { |
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56 | $this->resetQuery(); |
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57 | $query = trim($query); |
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58 | $this->getSQL = $query; |
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59 | $this->bindValues = $args; |
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60 | |||
61 | if (true == $quick) { |
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62 | $stmt = $this->dbh->prepare($query); |
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63 | $stmt->execute($this->bindValues); |
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64 | $this->rowCount = $stmt->rowCount(); |
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65 | |||
66 | return $stmt->fetchAll(); |
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67 | } else { |
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68 | if (0 === strpos(strtoupper($query), 'SELECT')) { |
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69 | $stmt = $this->dbh->prepare($query); |
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70 | $stmt->execute($this->bindValues); |
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71 | $this->rowCount = $stmt->rowCount(); |
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72 | |||
73 | $rows = $stmt->fetchAll(PDO::FETCH_CLASS, 'MareiObj'); |
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74 | $collection = []; |
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75 | $collection = new MareiCollection(); |
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76 | $x = 0; |
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77 | foreach ($rows as $key => $row) { |
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78 | $collection->offsetSet($x++, $row); |
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79 | } |
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80 | |||
81 | return $collection; |
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82 | } else { |
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83 | $this->getSQL = $query; |
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84 | $stmt = $this->dbh->prepare($query); |
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85 | $stmt->execute($this->bindValues); |
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86 | |||
87 | return $stmt->rowCount(); |
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88 | } |
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89 | } |
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90 | } |
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91 | |||
92 | public function exec() |
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93 | { |
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94 | //assimble query |
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95 | $this->sql .= $this->where; |
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96 | $this->getSQL = $this->sql; |
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97 | $stmt = $this->dbh->prepare($this->sql); |
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98 | $stmt->execute($this->bindValues); |
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99 | |||
100 | return $stmt->rowCount(); |
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101 | } |
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102 | |||
103 | private function resetQuery() |
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104 | { |
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105 | $this->table = null; |
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106 | $this->columns = null; |
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107 | $this->sql = null; |
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108 | $this->bindValues = null; |
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109 | $this->limit = null; |
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110 | $this->orderBy = null; |
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111 | $this->getSQL = null; |
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112 | $this->where = null; |
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113 | $this->orWhere = null; |
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114 | $this->whereCount = 0; |
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115 | $this->isOrWhere = false; |
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116 | $this->rowCount = 0; |
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117 | $this->lastIDInserted = 0; |
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118 | } |
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119 | |||
120 | public function delete($table_name, $id = null) |
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121 | { |
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122 | $this->resetQuery(); |
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123 | |||
124 | $this->sql = "DELETE FROM `{$table_name}`"; |
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125 | |||
126 | if (isset($id)) { |
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127 | // if there is an ID |
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128 | if (is_numeric($id)) { |
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129 | $this->sql .= ' WHERE `id` = ?'; |
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130 | $this->bindValues[] = $id; |
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131 | // if there is an Array |
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132 | } elseif (is_array($id)) { |
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133 | $arr = $id; |
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134 | $count_arr = count($arr); |
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135 | $x = 0; |
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136 | |||
137 | foreach ($arr as $param) { |
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138 | if (0 == $x) { |
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139 | $this->where .= ' WHERE '; |
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140 | ++$x; |
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141 | } else { |
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142 | if ($this->isOrWhere) { |
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143 | $this->where .= ' Or '; |
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144 | } else { |
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145 | $this->where .= ' AND '; |
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146 | } |
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147 | |||
148 | ++$x; |
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149 | } |
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150 | $count_param = count($param); |
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151 | |||
152 | if (1 == $count_param) { |
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153 | $this->where .= '`id` = ?'; |
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154 | $this->bindValues[] = $param[0]; |
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155 | } elseif (2 == $count_param) { |
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156 | $operators = explode(',', '=,>,<,>=,>=,<>'); |
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157 | $operatorFound = false; |
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158 | |||
159 | foreach ($operators as $operator) { |
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160 | if (false !== strpos($param[0], $operator)) { |
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161 | $operatorFound = true; |
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162 | break; |
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163 | } |
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164 | } |
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165 | |||
166 | if ($operatorFound) { |
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167 | $this->where .= $param[0] . ' ?'; |
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168 | } else { |
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169 | $this->where .= '`' . trim($param[0]) . '` = ?'; |
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170 | } |
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171 | |||
172 | $this->bindValues[] = $param[1]; |
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173 | } elseif (3 == $count_param) { |
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174 | $this->where .= '`' . trim($param[0]) . '` ' . $param[1] . ' ?'; |
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175 | $this->bindValues[] = $param[2]; |
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176 | } |
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177 | } |
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178 | //end foreach |
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179 | } |
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180 | // end if there is an Array |
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181 | $this->sql .= $this->where; |
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182 | |||
183 | $this->getSQL = $this->sql; |
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184 | $stmt = $this->dbh->prepare($this->sql); |
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185 | $stmt->execute($this->bindValues); |
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186 | |||
187 | return $stmt->rowCount(); |
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188 | } // end if there is an ID or Array |
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189 | // $this->getSQL = "<b>Attention:</b> This Query will update all rows in the table, luckily it didn't execute yet!, use exec() method to execute the following query :<br>". $this->sql; |
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190 | // $this->getSQL = $this->sql; |
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191 | return $this; |
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192 | } |
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193 | |||
194 | public function update($table_name, $fields = [], $id = null) |
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195 | { |
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196 | $this->resetQuery(); |
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197 | $set = ''; |
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198 | $x = 1; |
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199 | |||
200 | foreach ($fields as $column => $field) { |
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201 | $set .= "`$column` = ?"; |
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202 | $this->bindValues[] = $field; |
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203 | if ($x < count($fields)) { |
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204 | $set .= ', '; |
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205 | } |
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206 | ++$x; |
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207 | } |
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208 | |||
209 | $this->sql = "UPDATE `{$table_name}` SET $set"; |
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210 | |||
211 | if (isset($id)) { |
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212 | // if there is an ID |
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213 | if (is_numeric($id)) { |
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214 | $this->sql .= ' WHERE `id` = ?'; |
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215 | $this->bindValues[] = $id; |
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216 | // if there is an Array |
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217 | } elseif (is_array($id)) { |
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218 | $arr = $id; |
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219 | $count_arr = count($arr); |
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220 | $x = 0; |
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221 | |||
222 | foreach ($arr as $param) { |
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223 | if (0 == $x) { |
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224 | $this->where .= ' WHERE '; |
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225 | ++$x; |
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226 | } else { |
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227 | if ($this->isOrWhere) { |
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228 | $this->where .= ' Or '; |
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229 | } else { |
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230 | $this->where .= ' AND '; |
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231 | } |
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232 | |||
233 | ++$x; |
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234 | } |
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235 | $count_param = count($param); |
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236 | |||
237 | if (1 == $count_param) { |
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238 | $this->where .= '`id` = ?'; |
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239 | $this->bindValues[] = $param[0]; |
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240 | } elseif (2 == $count_param) { |
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241 | $operators = explode(',', '=,>,<,>=,>=,<>'); |
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242 | $operatorFound = false; |
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243 | |||
244 | foreach ($operators as $operator) { |
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245 | if (false !== strpos($param[0], $operator)) { |
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246 | $operatorFound = true; |
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247 | break; |
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248 | } |
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249 | } |
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250 | |||
251 | if ($operatorFound) { |
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252 | $this->where .= $param[0] . ' ?'; |
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253 | } else { |
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254 | $this->where .= '`' . trim($param[0]) . '` = ?'; |
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255 | } |
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256 | |||
257 | $this->bindValues[] = $param[1]; |
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258 | } elseif (3 == $count_param) { |
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259 | $this->where .= '`' . trim($param[0]) . '` ' . $param[1] . ' ?'; |
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260 | $this->bindValues[] = $param[2]; |
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261 | } |
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262 | } |
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263 | //end foreach |
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264 | } |
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265 | // end if there is an Array |
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266 | $this->sql .= $this->where; |
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267 | |||
268 | $this->getSQL = $this->sql; |
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269 | $stmt = $this->dbh->prepare($this->sql); |
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270 | $stmt->execute($this->bindValues); |
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271 | |||
272 | return $stmt->rowCount(); |
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273 | } // end if there is an ID or Array |
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274 | // $this->getSQL = "<b>Attention:</b> This Query will update all rows in the table, luckily it didn't execute yet!, use exec() method to execute the following query :<br>". $this->sql; |
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275 | // $this->getSQL = $this->sql; |
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276 | return $this; |
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277 | } |
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278 | |||
279 | public function insert($table_name, $fields = []) |
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280 | { |
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281 | $this->resetQuery(); |
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282 | |||
283 | $keys = implode('`, `', array_keys($fields)); |
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284 | $values = ''; |
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285 | $x = 1; |
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286 | foreach ($fields as $field => $value) { |
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287 | $values .= '?'; |
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288 | $this->bindValues[] = $value; |
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289 | if ($x < count($fields)) { |
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290 | $values .= ', '; |
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291 | } |
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292 | ++$x; |
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293 | } |
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294 | |||
295 | $this->sql = "INSERT INTO `{$table_name}` (`{$keys}`) VALUES ({$values})"; |
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296 | $this->getSQL = $this->sql; |
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297 | $stmt = $this->dbh->prepare($this->sql); |
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298 | $stmt->execute($this->bindValues); |
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299 | $this->lastIDInserted = $this->dbh->lastInsertId(); |
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300 | |||
301 | return $this->lastIDInserted; |
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302 | } |
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303 | |||
304 | //End insert function |
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305 | |||
306 | public function lastId() |
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307 | { |
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308 | return $this->lastIDInserted; |
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309 | } |
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310 | |||
311 | public function table($table_name) |
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312 | { |
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313 | $this->resetQuery(); |
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314 | $this->table = $table_name; |
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315 | |||
316 | return $this; |
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317 | } |
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318 | |||
319 | public function select($columns) |
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331 | } |
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332 | |||
333 | public function where() |
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334 | { |
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335 | if (0 == $this->whereCount) { |
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336 | $this->where .= ' WHERE '; |
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337 | ++$this->whereCount; |
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338 | } else { |
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339 | $this->where .= ' AND '; |
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340 | } |
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341 | |||
342 | $this->isOrWhere = false; |
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343 | |||
344 | // call_user_method_array('where_orWhere', $this, func_get_args()); |
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345 | //Call to undefined function call_user_method_array() |
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346 | //echo print_r(func_num_args()); |
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347 | $num_args = func_num_args(); |
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348 | $args = func_get_args(); |
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349 | if (1 == $num_args) { |
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350 | if (is_numeric($args[0])) { |
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351 | $this->where .= '`id` = ?'; |
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352 | $this->bindValues[] = $args[0]; |
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353 | } elseif (is_array($args[0])) { |
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354 | $arr = $args[0]; |
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355 | $count_arr = count($arr); |
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356 | $x = 0; |
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357 | |||
358 | foreach ($arr as $param) { |
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359 | if (0 == $x) { |
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360 | ++$x; |
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361 | } else { |
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362 | if ($this->isOrWhere) { |
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363 | $this->where .= ' Or '; |
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364 | } else { |
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365 | $this->where .= ' AND '; |
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366 | } |
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367 | |||
368 | ++$x; |
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369 | } |
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370 | $count_param = count($param); |
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371 | if (1 == $count_param) { |
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372 | $this->where .= '`id` = ?'; |
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373 | $this->bindValues[] = $param[0]; |
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374 | } elseif (2 == $count_param) { |
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375 | $operators = explode(',', '=,>,<,>=,>=,<>'); |
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376 | $operatorFound = false; |
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377 | |||
378 | foreach ($operators as $operator) { |
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379 | if (false !== strpos($param[0], $operator)) { |
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380 | $operatorFound = true; |
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381 | break; |
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382 | } |
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383 | } |
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384 | |||
385 | if ($operatorFound) { |
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386 | $this->where .= $param[0] . ' ?'; |
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387 | } else { |
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388 | $this->where .= '`' . trim($param[0]) . '` = ?'; |
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389 | } |
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390 | |||
391 | $this->bindValues[] = $param[1]; |
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392 | } elseif (3 == $count_param) { |
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393 | $this->where .= '`' . trim($param[0]) . '` ' . $param[1] . ' ?'; |
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394 | $this->bindValues[] = $param[2]; |
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395 | } |
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396 | } |
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397 | } |
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398 | // end of is array |
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399 | } elseif (2 == $num_args) { |
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400 | $operators = explode(',', '=,>,<,>=,>=,<>'); |
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401 | $operatorFound = false; |
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402 | foreach ($operators as $operator) { |
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403 | if (false !== strpos($args[0], $operator)) { |
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404 | $operatorFound = true; |
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405 | break; |
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406 | } |
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407 | } |
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408 | |||
409 | if ($operatorFound) { |
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410 | $this->where .= $args[0] . ' ?'; |
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411 | } else { |
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412 | $this->where .= '`' . trim($args[0]) . '` = ?'; |
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413 | } |
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414 | |||
415 | $this->bindValues[] = $args[1]; |
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416 | } elseif (3 == $num_args) { |
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417 | $this->where .= '`' . trim($args[0]) . '` ' . $args[1] . ' ?'; |
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418 | $this->bindValues[] = $args[2]; |
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419 | } |
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420 | |||
421 | return $this; |
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422 | } |
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423 | |||
424 | public function orWhere() |
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425 | { |
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426 | if (0 == $this->whereCount) { |
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427 | $this->where .= ' WHERE '; |
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428 | ++$this->whereCount; |
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429 | } else { |
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430 | $this->where .= ' OR '; |
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431 | } |
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432 | $this->isOrWhere = true; |
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433 | // call_user_method_array ( 'where_orWhere' , $this , func_get_args() ); |
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434 | |||
435 | $num_args = func_num_args(); |
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436 | $args = func_get_args(); |
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437 | if (1 == $num_args) { |
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438 | if (is_numeric($args[0])) { |
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439 | $this->where .= '`id` = ?'; |
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440 | $this->bindValues[] = $args[0]; |
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441 | } elseif (is_array($args[0])) { |
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442 | $arr = $args[0]; |
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443 | $count_arr = count($arr); |
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444 | $x = 0; |
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445 | |||
446 | foreach ($arr as $param) { |
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447 | if (0 == $x) { |
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448 | ++$x; |
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449 | } else { |
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450 | if ($this->isOrWhere) { |
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451 | $this->where .= ' Or '; |
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452 | } else { |
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453 | $this->where .= ' AND '; |
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454 | } |
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455 | |||
456 | ++$x; |
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457 | } |
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458 | $count_param = count($param); |
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459 | if (1 == $count_param) { |
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460 | $this->where .= '`id` = ?'; |
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461 | $this->bindValues[] = $param[0]; |
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462 | } elseif (2 == $count_param) { |
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463 | $operators = explode(',', '=,>,<,>=,>=,<>'); |
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464 | $operatorFound = false; |
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465 | |||
466 | foreach ($operators as $operator) { |
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467 | if (false !== strpos($param[0], $operator)) { |
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468 | $operatorFound = true; |
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469 | break; |
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470 | } |
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471 | } |
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472 | |||
473 | if ($operatorFound) { |
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474 | $this->where .= $param[0] . ' ?'; |
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475 | } else { |
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476 | $this->where .= '`' . trim($param[0]) . '` = ?'; |
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477 | } |
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478 | |||
479 | $this->bindValues[] = $param[1]; |
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480 | } elseif (3 == $count_param) { |
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481 | $this->where .= '`' . trim($param[0]) . '` ' . $param[1] . ' ?'; |
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482 | $this->bindValues[] = $param[2]; |
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483 | } |
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484 | } |
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485 | } |
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486 | // end of is array |
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487 | } elseif (2 == $num_args) { |
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488 | $operators = explode(',', '=,>,<,>=,>=,<>'); |
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489 | $operatorFound = false; |
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490 | foreach ($operators as $operator) { |
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491 | if (false !== strpos($args[0], $operator)) { |
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492 | $operatorFound = true; |
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493 | break; |
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494 | } |
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495 | } |
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496 | |||
497 | if ($operatorFound) { |
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498 | $this->where .= $args[0] . ' ?'; |
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499 | } else { |
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500 | $this->where .= '`' . trim($args[0]) . '` = ?'; |
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501 | } |
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502 | |||
503 | $this->bindValues[] = $args[1]; |
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504 | } elseif (3 == $num_args) { |
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505 | $this->where .= '`' . trim($args[0]) . '` ' . $args[1] . ' ?'; |
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506 | $this->bindValues[] = $args[2]; |
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507 | } |
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508 | |||
509 | return $this; |
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510 | } |
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511 | |||
512 | // private function where_orWhere() |
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513 | // { |
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514 | |||
515 | // } |
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516 | |||
517 | public function get() |
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518 | { |
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519 | $this->assimbleQuery(); |
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520 | $this->getSQL = $this->sql; |
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521 | |||
522 | $stmt = $this->dbh->prepare($this->sql); |
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523 | $stmt->execute($this->bindValues); |
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524 | $this->rowCount = $stmt->rowCount(); |
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525 | |||
526 | $rows = $stmt->fetchAll(PDO::FETCH_CLASS, 'MareiObj'); |
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527 | $collection = []; |
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528 | $collection = new MareiCollection(); |
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529 | $x = 0; |
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530 | foreach ($rows as $key => $row) { |
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531 | $collection->offsetSet($x++, $row); |
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532 | } |
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533 | |||
534 | return $collection; |
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535 | } |
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536 | |||
537 | // Quick get |
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538 | public function QGet() |
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539 | { |
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540 | $this->assimbleQuery(); |
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541 | $this->getSQL = $this->sql; |
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542 | |||
543 | $stmt = $this->dbh->prepare($this->sql); |
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544 | $stmt->execute($this->bindValues); |
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545 | $this->rowCount = $stmt->rowCount(); |
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546 | |||
547 | return $stmt->fetchAll(); |
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548 | } |
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549 | |||
550 | private function assimbleQuery() |
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551 | { |
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552 | if (null !== $this->columns) { |
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553 | $select = $this->columns; |
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554 | } else { |
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555 | $select = '*'; |
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556 | } |
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557 | |||
558 | $this->sql = "SELECT $select FROM `$this->table`"; |
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559 | |||
560 | if (null !== $this->where) { |
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561 | $this->sql .= $this->where; |
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562 | } |
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563 | |||
564 | if (null !== $this->orderBy) { |
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565 | $this->sql .= $this->orderBy; |
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566 | } |
||
567 | |||
568 | if (null !== $this->limit) { |
||
569 | $this->sql .= $this->limit; |
||
570 | } |
||
571 | } |
||
572 | |||
573 | public function limit($limit, $offset = null) |
||
574 | { |
||
575 | if (null == $offset) { |
||
576 | $this->limit = " LIMIT {$limit}"; |
||
577 | } else { |
||
578 | $this->limit = " LIMIT {$limit} OFFSET {$offset}"; |
||
579 | } |
||
580 | |||
581 | return $this; |
||
582 | } |
||
583 | |||
584 | /** |
||
585 | * Sort result in a particular order according to a column name. |
||
586 | * |
||
587 | * @param string $field_name the column name which you want to order the result according to |
||
588 | * @param string $order it determins in which order you wanna view your results whether 'ASC' or 'DESC' |
||
589 | * |
||
590 | * @return object it returns DB object |
||
591 | */ |
||
592 | public function orderBy($field_name, $order = 'ASC') |
||
593 | { |
||
594 | $field_name = trim($field_name); |
||
595 | |||
596 | $order = trim(strtoupper($order)); |
||
597 | |||
598 | // validate it's not empty and have a proper valuse |
||
599 | if (null !== $field_name && ('ASC' == $order || 'DESC' == $order)) { |
||
600 | if (null == $this->orderBy) { |
||
601 | $this->orderBy = " ORDER BY $field_name $order"; |
||
602 | } else { |
||
603 | $this->orderBy .= ", $field_name $order"; |
||
604 | } |
||
605 | } |
||
606 | |||
607 | return $this; |
||
608 | } |
||
609 | |||
610 | public function paginate($page, $limit) |
||
660 | } |
||
661 | |||
662 | public function count() |
||
663 | { |
||
664 | // Start assimble Query |
||
665 | $countSQL = "SELECT COUNT(*) FROM `$this->table`"; |
||
666 | |||
667 | if (null !== $this->where) { |
||
668 | $countSQL .= $this->where; |
||
669 | } |
||
670 | |||
671 | if (null !== $this->limit) { |
||
672 | $countSQL .= $this->limit; |
||
673 | } |
||
674 | // End assimble Query |
||
675 | |||
676 | $stmt = $this->dbh->prepare($countSQL); |
||
677 | $stmt->execute($this->bindValues); |
||
678 | |||
679 | $this->getSQL = $countSQL; |
||
680 | |||
681 | return $stmt->fetch(PDO::FETCH_NUM)[0]; |
||
682 | } |
||
683 | |||
684 | public function QPaginate($page, $limit) |
||
685 | { |
||
686 | // Start assimble Query |
||
687 | $countSQL = "SELECT COUNT(*) FROM `$this->table`"; |
||
688 | if (null !== $this->where) { |
||
689 | $countSQL .= $this->where; |
||
690 | } |
||
691 | // Start assimble Query |
||
692 | |||
693 | $stmt = $this->dbh->prepare($countSQL); |
||
694 | $stmt->execute($this->bindValues); |
||
695 | $totalRows = $stmt->fetch(PDO::FETCH_NUM)[0]; |
||
696 | // echo $totalRows; |
||
697 | |||
698 | $offset = ($page - 1) * $limit; |
||
699 | // Refresh Pagination Array |
||
700 | $this->pagination['currentPage'] = $page; |
||
701 | $this->pagination['lastPage'] = ceil($totalRows / $limit); |
||
702 | $this->pagination['nextPage'] = $page + 1; |
||
703 | $this->pagination['previousPage'] = $page - 1; |
||
704 | $this->pagination['totalRows'] = $totalRows; |
||
705 | // if last page = current page |
||
706 | if ($this->pagination['lastPage'] == $page) { |
||
707 | $this->pagination['nextPage'] = null; |
||
708 | } |
||
709 | if (1 == $page) { |
||
710 | $this->pagination['previousPage'] = null; |
||
711 | } |
||
712 | if ($page > $this->pagination['lastPage']) { |
||
713 | return []; |
||
714 | } |
||
715 | |||
716 | $this->assimbleQuery(); |
||
717 | |||
718 | $sql = $this->sql . " LIMIT {$limit} OFFSET {$offset}"; |
||
719 | $this->getSQL = $sql; |
||
720 | |||
721 | $stmt = $this->dbh->prepare($sql); |
||
722 | $stmt->execute($this->bindValues); |
||
723 | $this->rowCount = $stmt->rowCount(); |
||
724 | |||
725 | return $stmt->fetchAll(); |
||
726 | } |
||
727 | |||
728 | public function PaginationInfo() |
||
729 | { |
||
730 | return $this->pagination; |
||
731 | } |
||
732 | |||
733 | public function getSQL() |
||
734 | { |
||
735 | return $this->getSQL; |
||
736 | } |
||
737 | |||
738 | public function getCount() |
||
739 | { |
||
740 | return $this->rowCount; |
||
741 | } |
||
742 | |||
743 | public function rowCount() |
||
746 | } |
||
747 | } |
||
748 | // End Marei DB Class |
||
749 | |||
750 | //Start Marei Object Class |
||
751 | class MareiObj |
||
752 | { |
||
753 | public function toJSON() |
||
754 | { |
||
755 | return json_encode($this, JSON_NUMERIC_CHECK); |
||
756 | } |
||
757 | |||
758 | public function toArray() |
||
759 | { |
||
760 | return (array) $this; |
||
761 | } |
||
762 | |||
846 |
Let?s assume that you have a directory layout like this:
and let?s assume the following content of
Bar.php
:If both files
OtherDir/Foo.php
andSomeDir/Foo.php
are loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php
However, as
OtherDir/Foo.php
does not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php
, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: