使用名称空间与现有代码的项目

Question

I am trying to integrate PHPML with an existing project. PHPML uses namespaces and I have little experience using them.

I am able to run PHPML directly through my controller however when integrating it in to a class method I get the following error

Parse error: syntax error, unexpected 'use' (T_USE) in... on line 4

My class method:

class learn{
  public function return_adjustments(){
    include 'application/vendor/autoload.php';
    use Phpml\Regression\LeastSquares;
    use Phpml\Exception\FileException;

    $samples = $this->csv_to_array('samples.csv');
    $targets = $this->csv_to_array('targets.csv');

    $regression = new LeastSquares();
    $regression->train($samples, $targets);
}

Is it possible to do this correctly? I'm struggling on the concept of namespaces.

Answer 1

Put the "use" statements at the very top of your file in order to import them properly.

include 'application/vendor/autoload.php';

class learn{
  public function return_adjustments() {

    $samples = $this->csv_to_array('samples.csv');
    $targets = $this->csv_to_array('targets.csv');

    $regression = new Phpml\Regression\LeastSquares();
    $regression->train($samples, $targets);
}