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iterator_apply> <class_parents
[edit] Last updated: Fri, 24 May 2013

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class_uses

(PHP 5 >= 5.4.0)

class_uses Retourne le trait utilisé par une classe donnée.

Description

array class_uses ( mixed $class [, bool $autoload = true ] )

Cette fonction retourne un tableau représentant les noms des traits que la classe donnée utilise. Les traits des classes parentes ne sont pas représentés.

Liste de paramètres

class

Un objet ou un nom de classe sous forme de chaine.

autoload

Si oui ou non l'auto-chargement __autoload() doit être déclenché.

Valeurs de retour

Un tableau en cas de succès, FALSE sinon.

Exemples

Exemple #1 Exemples pour class_uses()

<?php

trait foo 
{ }
class 
bar {
  use 
foo;
}

print_r(class_uses(new bar));

print_r(class_uses('bar'));

function 
__autoload($class_name) {
   require_once 
$class_name '.php';
}

// utilise __autoload pour charger la classe 'not_loaded'
print_r(class_uses('not_loaded'true));

?>

L'exemple ci-dessus va afficher quelque chose de similaire à :

Array
(
    [foo] => foo
)

Array
(
    [foo] => foo
)

Array
(
    [trait_of_not_loaded] => trait_of_not_loaded
)

Voir aussi



iterator_apply> <class_parents
[edit] Last updated: Fri, 24 May 2013
 
add a note add a note User Contributed Notes class_uses - [4 notes]
up
1
stealz at op dot pl
5 months ago
To get ALL traits including those used by parent classes and other traits, use this function:

<?php
function class_uses_deep($class, $autoload = true) {
   
$traits = [];
    do {
       
$traits = array_merge(class_uses($class, $autoload), $traits);
    } while(
$class = get_parent_class($class));
    foreach (
$traits as $trait => $same) {
       
$traits = array_merge(class_uses($trait, $autoload), $traits);
    }
    return
array_unique($traits);
}
?>
up
0
adam at adamhahn dot com
23 days ago
This function can be used on traits as well as classes. Since traits 'use' other traits to create inheritance, this function allows you to get the parent trait(s) of another trait.

<?php

trait foo {
}

trait
child {
  use
foo;
}

print_r(class_uses('child')); // Outputs array containing 'foo'

?>
up
0
adam at adamhahn dot com
24 days ago
FYI: It is not explicitly stated, but if you run this function against a class that does not use any traits it will return an empty array.

<?php

class iDontUseTraits {
}

class_uses('iDontUseTraits'); // Returns empty array

?>
up
0
benkuhl at gmail dot com
5 months ago
[Edited by: googleguy at php dot net for clarity. It's obvious Xyz should have been Trait and not Class. ]

If your objective is to determine if a trait is being used by another class, you cannot use instanceOf...

<?php
Trait Xyz {

}
class
Abc {
    use
Xyz;
}


$abc = new Abc();

var_dump($abc instanceOf Xyz); // false
?>

You must use this function with either an in_array or array_key_exists...

<?php
var_dump
(array_key_exists('Xyz', class_uses($abc))); //true
?>

 
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