The performance of SplObjectStorage in PHP7.0.7 has boosted a lot.
SplObjectStorage
double(1.3110690116882)
[object_hash => value]
double(2.4147419929504)
SplObjectStorage::offsetGet
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplObjectStorage::offsetGet — Returns the data associated with an object
Açıklama
Returns the data associated with an object in the storage.
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
- SplObjectStorage::offsetSet() - Associates data to an object in the storage
- SplObjectStorage::offsetExists() - Checks whether an object exists in the storage
- SplObjectStorage::offsetUnset() - Removes an object from the storage
add a note
User Contributed Notes 2 notes
acgrid ¶
8 years ago
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
