1--TEST-- 2SPL: SplObjectStorage serialization references 3--FILE-- 4<?php 5$o1 = new stdClass; 6$o2 = new stdClass; 7 8$s = new splObjectStorage(); 9 10$s->attach($o1, array('prev' => 2, 'next' => $o2)); 11$s->attach($o2, array('prev' => $o1)); 12 13$ss = serialize($s); 14unset($s,$o1,$o2); 15echo $ss."\n"; 16var_dump(unserialize($ss)); 17?> 18--EXPECTF-- 19O:16:"SplObjectStorage":2:{i:0;a:4:{i:0;O:8:"stdClass":0:{}i:1;a:2:{s:4:"prev";i:2;s:4:"next";O:8:"stdClass":0:{}}i:2;r:6;i:3;a:1:{s:4:"prev";r:3;}}i:1;a:0:{}} 20object(SplObjectStorage)#2 (1) { 21 ["storage":"SplObjectStorage":private]=> 22 array(2) { 23 ["%s"]=> 24 array(2) { 25 ["obj"]=> 26 object(stdClass)#1 (0) { 27 } 28 ["inf"]=> 29 array(2) { 30 ["prev"]=> 31 int(2) 32 ["next"]=> 33 object(stdClass)#3 (0) { 34 } 35 } 36 } 37 ["%s"]=> 38 array(2) { 39 ["obj"]=> 40 object(stdClass)#3 (0) { 41 } 42 ["inf"]=> 43 array(1) { 44 ["prev"]=> 45 object(stdClass)#1 (0) { 46 } 47 } 48 } 49 } 50} 51