Question

How to echo a variable from the function? This is an example code.

function test() {
  $foo = 'foo';   //the variable
}

test();   //executing the function

echo $foo;   // no results in printing it out

Answer 1

The immediate answer to your question would be to import $foo into the function’s scope:

function test() {

  global $foo;
  $foo = 'foo';   //the variable
}

More on variable scope in PHP here.

this is, however, bad practice in most cases. You will usually want to return the desired value from the function, and assign it to $foo when calling the function.

   function test()
    { 
      return "foo"; 
     }

   $foo = test();

   echo $foo;  // outputs "foo"