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guido at go-mobile dot be ¶

13 days ago


Strange, it worked only when I removed the backslash before feline. 

So like this is OK : echo feline\Cat::says()

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Anonymous ¶

1 year ago


The keyword 'use' has two different applications, but the reserved word table links to here.



It can apply to namespace constucts:



file1:

<?php namespace foo;

  class Cat { 

    static function says() {echo 'meoow';}  } ?>



file2:

<?php namespace bar;

  class Dog {

    static function says() {echo 'ruff';}  } ?>



file3:

<?php namespace animate;

  class Animal {

    static function breathes() {echo 'air';}  } ?>



file4:

<?php namespace fub;

  include 'file1.php';

  include 'file2.php';

  include 'file3.php';

  use foo as feline;

  use bar as canine;

  use animate;

  echo \feline\Cat::says(), "<br />\n";

  echo \canine\Dog::says(), "<br />\n";

  echo \animate\Animal::breathes(), "<br />\n";  ?>



Note that 

felineCat::says()

should be

\feline\Cat::says()

(and similar for the others)

but this comment form deletes the backslash (why???) 



The 'use' keyword also applies to closure constructs:



<?php function getTotal($products_costs, $tax)

    {

        $total = 0.00;

        

        $callback =

            function ($pricePerItem) use ($tax, &$total)

            {

                

                $total += $pricePerItem * ($tax + 1.0);

            };

        

        array_walk($products_costs, $callback);

        return round($total, 2);

    }

?>

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