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

    Beschreibung

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

    Returns the data associated with an object in the storage.

    Parameter-Liste

    object

    The object to look for.

    Rückgabewerte

    The data previously associated with the object in the storage.

    Fehler/Exceptions

    Throws UnexpectedValueException when object could not be found.

    Beispiele

    Beispiel #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]
    ?>

    Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

    string(5) "hello"
NULL

    Siehe auch

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    User Contributed Notes 2 notes

    up
    3
    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
    2
    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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