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<?php /* 作者:shyhero 郵箱:shyhero@outlook.com Q Q:1757424878 */ class DB{ private $sql = array( "field"=>"", "where"=>"", "order"=>"", "limit"=>"", "group"=>"", "having"=>"" ); public function __call($functionName,$arr){ //只有在私有成員數組中存在的鍵才能被調用 $functionName = strtolower($functionName); if(array_key_exists($functionName,$this -> sql)){ $this -> sql[$functionName] = $arr[0]; }else{ echo "調用的方法不存在"; } return $this; } public function select(){ echo "select from {$this -> sql['field']} user {$this -> sql['where']} {$this -> sql['order']} {$this -> sql['limit']} {$this -> sql['group']} {$this -> sql['having']}"; } } $db = new DB(); $db -> field('sex count(sex)') //只有在私有成員數組中存在的鍵才能被調用 -> where('where sex in("m","w")') -> group('group by sex') -> having('having avg(age) > 25') -> select(); $db -> query('d'); //這個方法不存在就不能調用