php如何根据一个人url获取跳转后的url?

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<a href="http://ord.yahoo.co.jp/o/shopping/_ylt=A3JvdlKsFx5VRzIAzyMT.Pl7;_ylu=X3oDMTBhcGdnMXMzBHZ0aWQDU1MwMDM-/SIG=14t4nubp7/EXP=1428121900/**http%3a//rdsig.yahoo.co.jp/search/direct/promodd/evt=90004/RV=1/RU=aHR0cDovL3N0b3JlLnNob3BwaW5nLnlhaG9vLmNvLmpwL21hdHN1bmFtaS9mY2RtMy5odG1s"  onmousedown="if (checkSiteCatalyst()) {YAHOO.JP.sc.clickSearchResultPos('item=search|type=organic|disp=20|pg=1|pos=1')}"><em>ヒルズ</em> 猫用 <em>c/d</em> マルチケア 4kg　療法食</a>
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php，我模拟手机浏览器去访问yahoo的页面，取得商品的url如下：
http://ord.yahoo.co.jp/o/shopping/_ylt=A7dPdCbPKx5V.SgAqVET.Pl7/SIG=14t4hc3s6/EXP=1428127055/**http%3a//rdsig.yahoo.co.jp/search/direct/promodd/evt=90004/RV=1/RU=aHR0cDovL3N0b3JlLnNob3BwaW5nLnlhaG9vLmNvLmpwL21hdHN1bmFtaS9mY2RtMy5odG1s" onmousedown="if (checkSiteCatalyst()) {YAHOO.JP.sc.clickSearchResultPos('item=search|type=organic|disp=20|pg=1|pos=1')}
点击该商品名（如上url）后，就会跳转到该商品的页面，url如下：
http://store.shopping.yahoo.co.jp/matsunami/fcdm3.html
能不能根据从页面上取得的url，获得跳转后的url？