Nuances of Working with the Assignment Operation in PHP

Now we will analyze some nuances of working with the assignment operation.

Look at the following example:

php<?php
  $num = 1; // declare the variable $num and assign the value 1 to it
  $num = $num + 2; // assign to $num itself plus 2
  echo $num; // will output 3
?>

php<?php
  $num = 1;
  $num = $num + 1;
  $num = $num + 1;
  
  echo $num;
?>

php<?php
  $num = 1;
  $num = $num + 2;
  $num = $num + 3;
  
  echo $num;
?>