SplObjectStorage::offsetGet

(PHP 5 >= 5.3.0)

SplObjectStorage::offsetGetReturns the data associated with an object

Опис

public mixed SplObjectStorage::offsetGet ( object $object )

Returns the data associated with an object in the storage.

Параметри

object

The object to look for.

Значення, що повертаються

The data previously associated with the object in the storage.

Помилки/Винятки

Throws UnexpectedValueException when object could not be found.

Приклади

Приклад #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]
?>

Наведений вище приклад виведе щось подібне до:

string(5) "hello"
NULL

Прогляньте Також

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User Contributed Notes 2 notes

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2
acgrid
6 years ago
The performance of SplObjectStorage in PHP7.0.7 has boosted a lot.

SplObjectStorage
double(1.3110690116882)
[object_hash => value]
double(2.4147419929504)
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2
kontrollfreak+php at gmail dot com
7 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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