xpath - php find xml node thanks to isset variable form url -


i have single.php page want load individual post.

to have links in index.php allows load single.php page :

<a href="single.php?blog_no=12">post 12</a>  <a href="single.php?blog_no=11">post 11</a>    <a href="single.php?blog_no=10">post 10</a>

i variable in url in single.php page , want find (and display), in xml file, element correspond variable:

<?php if(isset($_get["blog_no"])) {  $i = $_get["blog_no"];  $elements = new simplexmlelement('data.xml', null, true);  $query = $elements->xpath(" /elements/element[@id='$i'] ");  foreach($query $element) {      echo $elements->element['size'];     echo $elements->element['category'];     echo $elements->element->title;  } ?>

here example of xml file:

<elements>  <element id="12" size="square" category="portfolio">     <tag tag="printer printing 3d apple iphone 5 bumper case"></tag>     <icon class="icon-picture"></icon>     <urlpage url="/contact/contact.html"></urlpage>     <urlimage src='./post thumbnail images/01.png'></urlimage>     <date date="8 apr"></date>     <title>minimal bumper iphone 5 : protect iphone lightwheight , protect full case </title> </element>  <element id="11" size="normal" category="portfolio">     <tag tag="printer printing 3d apple iphone 5 case slim"></tag>     <icon class="icon-picture"></icon>     <urlpage url="/portfolio/11.html"></urlpage>     <urlimage src='./post thumbnail images/tape-dribbble.jpg'></urlimage>     <date date="21 jan"></date>     <title>ultraslim case</title> </element>  </elements>

but nothing works.

you quite close it, this:

if (isset($_get['blog_no'])) {       $id = $_get['blog_no'];     $xml = simplexml_load_string($x); // assume xml in $x     $element = $xml->xpath("//element[@id='$id']")[0];     echo "$element[size] - $element[category]<br />$element->title<br />";  } else {      echo "no post selected!" }

explanation:

  1. in xpath, //element means select every <element> @ position in xml
  2. xpath return array, [0] select 1st match. syntax work in php >=5.4, if you're below, let me know , i'll post right code.
  3. no need foreach, there can 1 <element> selected, because id unique (i guess).

see working: http://codepad.viper-7.com/ly3itl


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