unserialize之类的问题

Question

$forumdomains = @unserialize('a:4:{i:4;s:16:"bbs1.discuz7.com";i:6;s:16:"bbs2.discuz7.com";i:2;s:17:"bbs3.discuz7.com";i:9;s:14:"bbs4.discuz7.com";}');
echo $forumdomains[2]; 输出的是bbs3.discuz7.com如果知道bbs3.discuz7.com怎么获取2

Answer 1

foreach( $i = 0 , $j = count($forumdomains) ; $i < $j ; $i++ )
{
     if($forumdomains[$i] == 'bbs3.discuz7.com')
     {
           echo $i;
           break;
     }
}

Answer 2

echo array_search ("bbs3.discuz7.com", unserialize('a:4:{i:4;s:16:"bbs1.discuz7.com";i:6;s:16:"bbs2.discuz7.com";i:2;s:16:"bbs3.discuz7.com";i:9;s:16:"bbs4.discuz7.com";}'));

Answer 3

 Parse error: syntax error, unexpected ','