SplObjectStorage::offsetGet

(PHP 5 >= 5.3.0)

SplObjectStorage::offsetGetReturns the data associated with an object

Descrierea

public mixed SplObjectStorage::offsetGet ( object $object )

Returns the data associated with an object in the storage.

Parametri

object

The object to look for.

Valorile întoarse

The data previously associated with the object in the storage.

Erori/Excepții

Throws UnexpectedValueException when object could not be found.

Exemple

Example #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]
?>

Exemplul de mai sus va afișa ceva similar cu:

string(5) "hello"
NULL

A se vedea și

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User Contributed Notes 1 note

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kontrollfreak+php at gmail dot com
1 month 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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