Countable::count

    (PHP 5 >= 5.1.0, PHP 7, PHP 8)

    Countable::count — Count elements of an object

    Descrizione

    public Countable::count(): int

    This method is executed when using the count() function on an object implementing Countable.

    Elenco dei parametri

    Questa funzione non contiene parametri.

    Valori restituiti

    The custom count as an int.

    Nota:

    The return value is cast to an int.

    Esempi

    Example #1 Countable::count() example

    <?php
    class myCounter implements Countable {
    private     $count = 0;
    public function     count() {
    return ++    $this->count;
    }
    }

    $counter = new myCounter;

    for(    $i=0; $i<10; ++$i) {
    echo     "I have been count()ed " . count($counter) . " times\n";
    }
    ?>

    Il precedente esempio visualizzerà qualcosa simile a:

    I have been count()ed 1 times
I have been count()ed 2 times
I have been count()ed 3 times
I have been count()ed 4 times
I have been count()ed 5 times
I have been count()ed 6 times
I have been count()ed 7 times
I have been count()ed 8 times
I have been count()ed 9 times
I have been count()ed 10 times

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    User Contributed Notes 1 note

    up
    13
    SenseException
    10 years ago
    Even though Countable::count method is called when the object implementing Countable is used in count() function, the second parameter of count, $mode, has no influence to your class method.

    $mode is not passed to Countable::count:

    <?php

    class Foo implements Countable
    {
    public function     count()
    {
    var_dump(func_get_args());
    return     1;
    }
    }

    count(new Foo(), COUNT_RECURSIVE);

    ?>

    var_dump output:

    array(0) {
    }
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