PHP regex to check if image is wrapped with a tag -


i creating wordpress function , need determine whether image in content wrapped tag contains link pdf or doc file e.g.

<a href="www.site.com/document.pdf"><img src="../images/image.jpg" /></a>

how go doing php?

thanks

i very advise against using regular expression this. besides being more error prone , less readable, not give ability manipulate content easily.

you better of loading content domdocument, retrieving <img> elements , validating whether or not parents <a> elements. have validate whether or not value of href attribute ends desired extension.

a crude implementation bit this:

<?php  $shtml = <<<html <html> <body>     <img src="../images/image.jpg" />     <a href="www.site.com/document.pdf"><img src="../images/image.jpg" /></a>     <a href="www.site.com/document.txt"><img src="../images/image.jpg" /></a>     <p>this text <a href="site.com/doc.pdf"> more text</p>  </body> </html> html;  $odoc = new domdocument(); $odoc->loadhtml($shtml); $onodelist = $odoc->getelementsbytagname('img');  foreach($onodelist $t_onode) {     if($t_onode->parentnode->nodename === 'a')     {         $slinkvalue = $t_onode->parentnode->getattribute('href');         $sextension = substr($slinkvalue, strrpos($slinkvalue, '.'));          echo '<li>i wrapped in anchor tag '            . 'and link  ' . $sextension . ' file '         ;      } } ?>

i'll leave exact implementation exercise reader ;-)


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