php - 正規表現を使用してGoogleマップの埋め込みリンクからsrcを抽出する

Question

みなさん、こんにちは。読んでくれてありがとう。私はこのようなリンクを持っています:

<iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="https://maps.google.it/maps?f=q&amp;source=s_q&amp;hl=en&amp;geocode=&amp;q=monte+rosa&amp;aq=&amp;sll=45.454082,9.213138&amp;sspn=0.009016,0.01929&amp;t=h&amp;gl=it&amp;ie=UTF8&amp;hq=&amp;hnear=Monte+Rosa,+Province+of+Varese,+Lombardy&amp;ll=45.690627,8.824349&amp;spn=0.008978,0.01929&amp;z=14&amp;iwloc=A&amp;output=embed"></iframe><br /><small><a href="https://maps.google.it/maps?f=q&amp;source=embed&amp;hl=en&amp;geocode=&amp;q=monte+rosa&amp;aq=&amp;sll=45.454082,9.213138&amp;sspn=0.009016,0.01929&amp;t=h&amp;gl=it&amp;ie=UTF8&amp;hq=&amp;hnear=Monte+Rosa,+Province+of+Varese,+Lombardy&amp;ll=45.690627,8.824349&amp;spn=0.008978,0.01929&amp;z=14&amp;iwloc=A" style="color:#0000FF;text-align:left">View Larger Map</a></small>

これだけ抜き出したい

https://maps.google.it/maps?f=q&source=s_q&hl=en&geocode=&q=monte+rosa&aq=&sll=45.454082,9.213138&sspn=0.009016,0.01929&t=h&gl=it&ie=UTF8&hq=&hnear=Monte+Rosa,+Province+of+Varese,+Lombardy&ll=45.690627,8.824349&spn=0.008978,0.01929&z=14&iwloc=A&output=embed

つまり、 src=" からリンクの最後までのすべてを抽出したい ". 正規表現を使用してみましたが、正しい構文がわかりません。いくつかの助けをいただければ幸いです。

Answer 1

$html = '<iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="https://maps.google.it/maps?f=q&amp;source=s_q&amp;hl=en&amp;geocode=&amp;q=monte+rosa&amp;aq=&amp;sll=45.454082,9.213138&amp;sspn=0.009016,0.01929&amp;t=h&amp;gl=it&amp;ie=UTF8&amp;hq=&amp;hnear=Monte+Rosa,+Province+of+Varese,+Lombardy&amp;ll=45.690627,8.824349&amp;spn=0.008978,0.01929&amp;z=14&amp;iwloc=A&amp;output=embed"></iframe><br /><small><a href="https://maps.google.it/maps?f=q&amp;source=embed&amp;hl=en&amp;geocode=&amp;q=monte+rosa&amp;aq=&amp;sll=45.454082,9.213138&amp;sspn=0.009016,0.01929&amp;t=h&amp;gl=it&amp;ie=UTF8&amp;hq=&amp;hnear=Monte+Rosa,+Province+of+Varese,+Lombardy&amp;ll=45.690627,8.824349&amp;spn=0.008978,0.01929&amp;z=14&amp;iwloc=A" style="color:#0000FF;text-align:left">View Larger Map</a></small>';
preg_match('~iframe.*src="([^"]*)"~', $html, $result);
var_dump($result[1]);