SplObjectStorage::offsetGet

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

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

    Açıklama

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

    Returns the data associated with an object in the storage.

    Bağımsız Değişkenler

    object

    The object to look for.

    Dönen Değerler

    The data previously associated with the object in the storage.

    Hatalar/İstisnalar

    Throws UnexpectedValueException when object could not be found.

    Örnekler

    Örnek 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]
    ?>

    Yukarıdaki örnek şuna benzer bir çıktı üretir:

    string(5) "hello"
NULL

    Ayrıca Bakınız

    Improve This Page

    Learn How To Improve This Page • Submit a Pull Request • Report a Bug
    ＋add a note

    User Contributed Notes 2 notes

    up
    3
    acgrid
    7 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
    8 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
    ＋add a note
    To Top