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Question

To be specific, i have a two class Request and Utils,

class Request
{
public function __construct()
{
//constructor method
}
public function request()
{
  $utils=new Utils;
  $consolidated_errors=$utils->array_remove_empty($all_params_error);
}   
public function process()
{
  $utils=new Utils;
  $consolidated_errors=$utils->another_method($all_params_error);
 }                                                                   
}

And class Utils,

class Utils
{
public function __construct()
{
 //constructor method
}
public function array_remove_empty()
{
  //returns a variable.
  }        
public function another_method()
{
  //returns a variable.
 }     

}

you can see that i am initializing the class two times in request class , and my question is that any way initializing the class globally and using through out the class?

Answer 1

You are looking for Singleton pattern

Following demonstrate very basic Singleton example for your class

public class Utils {
  private static Utils uniqInstance;

  private Utils() {
  }

  public static synchronized Utils getInstance() {
    if (uniqInstance == null) {
      uniqInstance = new Utils();
    }
    return uniqInstance;
  }
  // other useful methods here
} 

get the instance using static-factory pattern