QUIZGUM

Coding Class

Quizgum : generator from

Generator - from

Let's see how to connect from one generator to another.
This is called generator delegation. Use the from keyword.

Generator from How to use

  1. function generator() {
  2.  
  3.     echo "generator 1 operation 1 <br>";
  4.     echo "generator 1 operation 2 <br>";
  5.  
  6.     yield "generator 1 - 1";
  7.  
  8.     echo "generator 1 operation 3 <br>";
  9.     echo "generator 1 operation 4 <br>";
  10.  
  11.     yield "generator 2 - 1";
  12.  
  13.     echo "generator 1 operation 5 <br>";
  14.     echo "generator 1 operation 6 <br>";
  15.  
  16.     yield from generator2();
  17. }
  18.  
  19. function generator2() {
  20.     echo "generator 2 operation 1";
  21.     echo "generator 2 operation 2";
  22.  
  23.     yield "generator 2 - 1";
  24.     return;
  25. }

Looking at the end of generator 1 above, we call generator 2 using the from keyword.
Now let's call Generator 1 and see that Generator 2 is also called.

  1. <?php
  2.     function generatorOne() {
  3.  
  4.         echo "generator 1 operation 1 <br>";
  5.         echo "generator 1 operation 2 <br>";
  6.  
  7.         yield "generator 1 - 1<br>";
  8.  
  9.         echo "generator 1 operation 3 <br>";
  10.         echo "generator 1 operation 4 <br>";
  11.  
  12.         yield "generator 2 - 1<br>";
  13.  
  14.         echo "generator 1 operation 5 <br>";
  15.         echo "generator 1 operation 6 <br>";
  16.  
  17.         yield from generatorTwo();
  18.     }
  19.  
  20.     function generatorTwo() {
  21.         echo "<hr>generator 2 operation 1<br>";
  22.         echo "generator 2 operation 2<br>";
  23.  
  24.         yield "generator 2 - 1<br>";
  25.         return;
  26.     }
  27.  
  28.     foreach(generatorOne() as $go){
  29.         echo $go;
  30.     }
  31. ?>

Here is the result of the above code:

You learned how to call another generator from a generator using the from keyword. ^^