SplObjectStorage::offsetGet

(PHP 5 >= 5.3.0, PHP 7)

SplObjectStorage::offsetGetReturns the data associated with an object

Opis

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

Returns the data associated with an object in the storage.

Parametry

object

The object to look for.

Zwracane wartości

The data previously associated with the object in the storage.

Błędy/Wyjątki

Throws UnexpectedValueException when object could not be found.

Przykłady

Przykład #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]
?>

Powyższy przykład wyświetli coś podobnego do:

string(5) "hello"
NULL

Zobacz też:

add a note add a note

User Contributed Notes 2 notes

up
1
acgrid
4 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
1
kontrollfreak+php at gmail dot com
5 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
To Top