PHP 8.4.1 Released!

    SplObjectStorage::offsetGet

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

    SplObjectStorage::offsetGet — Returns the data associated with an object

    Descrizione

    public SplObjectStorage::offsetGet(object $object): mixed

    Returns the data associated with an object in the storage.

    Elenco dei parametri

    object

    The object to look for.

    Valori restituiti

    The data previously associated with the object in the storage.

    Errori/Eccezioni

    Throws UnexpectedValueException when object could not be found.

    Esempi

    Example #1 SplObjectStorage::offsetGet() example

    <?php
    $s     = new SplObjectStorage;

    $o1 = new stdClass;
    $o2 = new stdClass;

    $s[$o1] = "hello";
    $s->attach($o2);


    var_dump($s->offsetGet($o1)); // Similar to $s[$o1]
    var_dump($s->offsetGet($o2)); // Similar to $s[$o2]
    ?>

    Il precedente esempio visualizzerà qualcosa simile a:

    string(5) "hello"
NULL

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    User Contributed Notes 2 notes

    up
    1
    acgrid
    8 years ago
    The performance of SplObjectStorage in PHP7.0.7 has boosted a lot.

    SplObjectStorage
    double(1.3110690116882)
    [object_hash => value]
    double(2.4147419929504)
    up
    1
    kontrollfreak+php at gmail dot com
    9 years ago
    SplObjectStorage::offsetGet() can become EXTREMELY slow depending on the associated data (PHP 5.6).

    <?php

    // SplObjectStorage
    $object = new stdClass;
    $test = new SplObjectStorage;
    $test->attach($object, str_repeat("\0", 1024*1024));
    $start = microtime(true);
    for (    $i = 0; $i < 1000000; $i++) {
    $test->offsetGet($object);
    }
    var_dump(microtime(true) - $start); // 76 seconds!

    // Array + spl_object_hash()
    $object = new stdClass;
    $test = [];
    $test[spl_object_hash($object)] = str_repeat("\0", 1024*1024);
    $start = microtime(true);
    for (    $i = 0; $i < 1000000; $i++) {
    $temp = $test[spl_object_hash($object)];
    }
    var_dump(microtime(true) - $start); // 0.3 seconds
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