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    forward_static_call

    (PHP 5 >= 5.3.0, PHP 7, PHP 8)

    forward_static_call — Appelle une méthode statique

    Description

    forward_static_call(callable $callback, mixed ...$args): mixed

    Appelle une fonction ou une méthode utilisateur, nommée callback, avec les arguments qui suivent. Cette fonction doit être appelée depuis une méthode, et ne peut pas être utilisée hors d'une classe. Elle utilise le liage statique.

    Liste de paramètres

    callback

    La fonction ou la méthode appelée. Ce paramètre peut être un tableau, avec le nom de la classe et de la méthode, ou une chaîne, avec le nom de la fonction.

    args

    Zéro ou plusieurs paramètres à passer à la fonction.

    Valeurs de retour

    Retourne le résultat de la fonction, ou bien false en cas d'erreur.

    Exemples

    Exemple #1 Exemple avec forward_static_call()

    <?php

    class A
    {
    const     NAME = 'A';
    public static function     test() {
    $args = func_get_args();
    echo static::    NAME, " ".join(',', $args)." \n";
    }
    }

    class     B extends A
    {
    const     NAME = 'B';

    public static function     test() {
    echo     self::NAME, "\n";
    forward_static_call(array('A', 'test'), 'encore', 'args');
    forward_static_call( 'test', 'autres', 'args');
    }
    }

    B::test('foo');

    function     test() {
    $args = func_get_args();
    echo     "C ".join(',', $args)." \n";
    }

    ?>

    L'exemple ci-dessus va afficher :

    B
B encore,args 
C autres,args

    Voir aussi

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    User Contributed Notes 2 notes

    up
    4
    arthur dot techarts at gmail dot com
    13 years ago
    Example to understand this function and difference with call_user_func:

    <?php
    class Beer {
    const     NAME = 'Beer!';
    public static function     printed(){
    echo     'static Beer:NAME = '. static::NAME . PHP_EOL;
    }
    }

    class     Ale extends Beer {
    const     NAME = 'Ale!';
    public static function     printed(){
    forward_static_call(array('parent','printed'));
    call_user_func(array('parent','printed'));

    forward_static_call(array('Beer','printed'));
    call_user_func(array('Beer','printed'));
    }
    }

    Ale::printed();
    echo     '</pre>';
    ?>
    up
    0
    jhibbard at gmail dot com
    12 years ago
    Example usage via calls outside of the class and within an object:

    <?php
    /**
    * @author Jonathon Hibbard
    */
    class foo {
    # used to verify we're actually setting something..
    private static $value = '';

    /**
    * Simple setter for the static method setValue...
    */
    public static function set($method_identifier, $value_to_pass = '') {
    # make sure we have the right method format...
    # another semi-useful example is like this (useful for REST-like requests...): str_replace(" ", "", ucwords(str_replace("_", " ", $method_identifier)));
    $static_method = 'set' . ucfirst(strtolower(trim($method_identifier)));

    if(    method_exists(__CLASS__, $static_method)) {
    //Note: this will not work and will throw PHP Parse error: syntax error, unexpected '::'
    //__CLASS__::$static_method($value_to_pass);

    foo::$static_method($value_to_pass);

    echo     "\tCalling forward_static_call with pure string and value param:\n";
    forward_static_call(__CLASS__ . "::" . $static_method, $value_to_pass);

    echo     "\tCalling forward_static_call with class, method array and value param:\n";
    forward_static_call(array(__CLASS__, $static_method), $value_to_pass);
    }
    }

    /**
    * Set self::$value to something?
    */
    public static function setValue($value_recieved = '') {
    echo     "\t\tsetValue called with param of " . var_export($value_recieved, true) . "!\n";

    echo     "\t\tSetting Private 'value'...\n";

    self::$value = $value_recieved;

    echo     "\t\tChecking the Private 'value':\n";
    if(!empty(    self::$value)) {
    echo     "\t\t\tPrivate 'value' was set to '" . self::$value . "' as expected!\n";
    } else {
    echo     "\t\t\tPrivate 'value' was not set!\n";
    }

    # Reset...
    self::$value = '';
    }

    /**
    * Create an object and test calling the static method from within this realm...
    */
    public function __construct() {
    echo     "\tCalling from within constructor..\n";
    foo::set('value','Something else from within the instance!');
    }
    }

    echo     "\n============ Calling by static method first ============\n";
    foo::set('value','Something from outside of the foo class!');

    echo     "\n============ Calling by static method without a value next ============\n";
    foo::set('value');

    echo     "\n============ Calling by createing an instance next ============\n";
    new     foo();
    ?>
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