类似这样：
Array
(
[tag] => PubmedArticle
[value] => Array
(
[0] => Array
(
[tag] => MedlineCitation
[value] => Array
(
[0] => Array
(
[tag] => PMID
[value] => 25864520
[attributes] => Array
(
[Version] => 1
)
)
[1] => Array
(
[tag] => DateCreated
[value] => Array
(
[0] => Array
(
[tag] => Year
[value] => 2015
)
[1] => Array
(
[tag] => Month
[value] => 4
)
[2] => Array
(
[tag] => Day
[value] => 13
)
)
)
[2] => Array
(
[tag] => DateRevised
[value] => Array
(
[0] => Array
(
[tag] => Year
[value] => 2015
)
[1] => Array
(
[tag] => Month
[value] => 4
)
[2] => Array
(
[tag] => Day
[value] => 14
)
)
)
[3] => Array
(
[tag] => Article
[value] => Array
(
[0] => Array
(
[tag] => Journal
[value] => Array
(
[0] => Array
(
[tag] => ISSN
[value] => 1364-548X
[attributes] => Array
(
[IssnType] => Electronic
)
)
[1] => Array
(
[tag] => JournalIssue
[value] => Array
(
[0] => Array
(
[tag] => PubDate
[value] => Array
(
[0] => Array
(
[tag] => Year
[value] => 2015
)
[1] => Array
(
[tag] => Month
[value] => Apr
)
[2] => Array
(
[tag] => Day
[value] => 13
)
)
)
)
[attributes] => Array
(
[CitedMedium] => Internet
)
)
[2] => Array
(
[tag] => Title
[value] => Chemical communications (Cambridge, England)
)
[3] => Array
(
[tag] => ISOAbbreviation
[value] => Chem. Commun. (Camb.)
)
)
)
[1] => Array
(
[tag] => ArticleTitle
[value] => Anisotropic particles templated by Janus emulsion.
)
[2] => Array
(
[tag] => Pagination
[value] => Array
(
[0] => Array
(
[tag] => MedlinePgn
[value] =>
)
)
)
[3] => Array
(
[tag] => Abstract
[value] => Array
(
[0] => Array
(
[tag] => AbstractText
[value] => Anisotropic particles, with morphology from crescent to moon shape and size from micrometer to nanometer scale, are fabricated in batch scale with Janus emulsion as template. The strategy is also useful in the synthesis of Janus particles with chemically distinct hemispheres.
[attributes] => Array
(
[NlmCategory] => UNASSIGNED
)
)
)
)
[4] => Array
(
[tag] => AuthorList
[value] => Array
(
[0] => Array
(
[tag] => Author
[value] => Array
(
[0] => Array
(
[tag] => LastName
[value] => Ge
)
[1] => Array
(
[tag] => ForeName
[value] => Lingling
)
[2] => Array
(
[tag] => Initials
[value] => L
)
[3] => Array
(
[tag] => AffiliationInfo
[value] => Array
(
[0] => Array
(
[tag] => Affiliation
[value] => School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, China. llge@yzu.edu.cn guorong@yzu.edu.cn.
)
)
)
)
)
[1] => Array
(
[tag] => Author
[value] => Array
(
[0] => Array
(
[tag] => LastName
[value] => Lu
)
[1] => Array
(
[tag] => ForeName
[value] => Shuhui
)
[2] => Array
(
[tag] => Initials
[value] => S
)
)
)
[2] => Array
(
[tag] => Author
[value] => Array
(
[0] => Array
(
[tag] => LastName
[value] => Han
)
[1] => Array
(
[tag] => ForeName
[value] => Jie
)
[2] => Array
(
[tag] => Initials
[value] => J
)
)
)
[3] => Array
(
[tag] => Author
[value] => Array
(
[0] => Array
(
[tag] => LastName
[value] => Guo
)
[1] => Array
(
[tag] => ForeName
[value] => Rong
)
[2] => Array
(
[tag] => Initials
[value] => R
)
)
)
)
)
[5] => Array
(
[tag] => Language
[value] => ENG
)
[6] => Array
(
[tag] => PublicationTypeList
[value] => Array
(
[0] => Array
(
[tag] => PublicationType
[value] => JOURNAL ARTICLE
[attributes] => Array
(
[UI] =>
)
)
)
)
[7] => Array
(
[tag] => ArticleDate
[value] => Array
(
[0] => Array
(
[tag] => Year
[value] => 2015
)
[1] => Array
(
[tag] => Month
[value] => 4
)
[2] => Array
(
[tag] => Day
[value] => 13
)
)
[attributes] => Array
(
[DateType] => Electronic
)
)
)
[attributes] => Array
(
[PubModel] => Print-Electronic
)
)
[4] => Array
(
[tag] => MedlineJournalInfo
[value] => Array
(
[0] => Array
(
[tag] => MedlineTA
[value] => Chem Commun (Camb)
)
[1] => Array
(
[tag] => NlmUniqueID
[value] => 9610838
)
[2] => Array
(
[tag] => ISSNLinking
[value] => 1359-7345
)
)
)
)
[attributes] => Array
(
[Status] => Publisher
[Owner] => NLM
)
)
[1] => Array
(
[tag] => PubmedData
[value] => Array
(
[0] => Array
(
[tag] => History
[value] => Array
(
[0] => Array
(
[tag] => PubMedPubDate
[value] => Array
(
[0] => Array
(
[tag] => Year
[value] => 2015
)
[1] => Array
(
[tag] => Month
[value] => 4
)
[2] => Array
(
[tag] => Day
[value] => 14
)
[3] => Array
(
[tag] => Hour
[value] => 6
)
[4] => Array
(
[tag] => Minute
[value] => 0
)
)
[attributes] => Array
(
[PubStatus] => entrez
)
)
[1] => Array
(
[tag] => PubMedPubDate
[value] => Array
(
[0] => Array
(
[tag] => Year
[value] => 2015
)
[1] => Array
(
[tag] => Month
[value] => 4
)
[2] => Array
(
[tag] => Day
[value] => 14
)
[3] => Array
(
[tag] => Hour
[value] => 6
)
[4] => Array
(
[tag] => Minute
[value] => 0
)
)
[attributes] => Array
(
[PubStatus] => pubmed
)
)
[2] => Array
(
[tag] => PubMedPubDate
[value] => Array
(
[0] => Array
(
[tag] => Year
[value] => 2015
)
[1] => Array
(
[tag] => Month
[value] => 4
)
[2] => Array
(
[tag] => Day
[value] => 14
)
[3] => Array
(
[tag] => Hour
[value] => 6
)
[4] => Array
(
[tag] => Minute
[value] => 0
)
)
[attributes] => Array
(
[PubStatus] => medline
)
)
)
)
[1] => Array
(
[tag] => PublicationStatus
[value] => aheadofprint
)
[2] => Array
(
[tag] => ArticleIdList
[value] => Array
(
[0] => Array
(
[tag] => ArticleId
[value] => 10.1039/c5cc00935a
[attributes] => Array
(
[IdType] => doi
)
)
[1] => Array
(
[tag] => ArticleId
[value] => 25864520
[attributes] => Array
(
[IdType] => pubmed
)
)
)
)
)
)
)
)
这很明显是XML转来的吧
别转成数组先直接通过XML的方式来定位吧，XPath什么的还是很强大的
你这个题目问得太不清晰了。。。比如要取哪个数组里面的哪些值？
foreach