This also appears to be the function which gets used within the contains() function, so if all the objects you are storing already have a unique id you can overwrite this function with your own class.
<?php
class UserStorage extends SPLObjectStorage{
public function getHash($obj){
return $obj->id;
}
}
$us = new UserStorage();
$user1 = new User(1);
$user2 = new User(2);
$us->attach($user1);
$us->attach($user2);
$me = new User(2);
// the following would normally fail since they are two separate objects
// but it works now with our extended getHash()
$us->contains($me);
?>
PHP.mk документација
SplObjectStorage::getHash
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Патека
splobjectstorage.gethash.php
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Извор
php.net/manual/en
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Режим
Прокси + превод во позадина
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Референца
splobjectstorage.gethash.php
SplObjectStorage::getHash
Референца за `splobjectstorage.gethash.php` со подобрена типографија и навигација.
SplObjectStorage::getHash
(PHP 5 >= 5.4.0, PHP 7, PHP 8)
SplObjectStorage::getHash — Calculate a unique identifier for the contained objects
= NULL
This method calculates an identifier for the objects added to an SplObjectStorage object.
The implementation in SplObjectStorage returns the same value as spl_object_hash().
The storage object will never contain more than one object with the same identifier. As such, it can be used to implement a set (a collection of unique values) where the quality of an object being unique is determined by the value returned by this function being unique.
Параметри
object-
The object whose identifier is to be calculated.
Вратени вредности
А string with the calculated identifier.
Errors/Exceptions
А RuntimeException is thrown when the returned value is not a string.
Примери
Пример #1 SplObjectStorage::getHash() example
<?php
class OneSpecimenPerClassStorage extends SplObjectStorage {
public function getHash($o) {
return get_class($o);
}
}
class A {}
$s = new OneSpecimenPerClassStorage;
$o1 = new stdClass;
$o2 = new stdClass;
$o3 = new A;
$s[$o1] = 1;
//$o2 is considered equal to $o1 so the value is replaced
$s[$o2] = 2;
$s[$o3] = 3;
//these are considered equal to the objects before
//so they can be used to access the values stored under them
$p1 = new stdClass;
$p2 = new A;
echo $s[$p1], "\n";
echo $s[$p2], "\n";
?>Горниот пример ќе прикаже нешто слично на:
2 3
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aron dot duby at gmail dot com ¶
пред 13 години