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<snippet>
  <content><![CDATA[
    <pre>
     <?php print_r(${1:this}); ?>
    </pre>
]]></content>
  <!-- Optional: Set a tabTrigger to define how to trigger the snippet -->
  <tabTrigger>print_r</tabTrigger>
  <!-- Optional: Set a scope to limit where the snippet will trigger -->
  <scope>source.html</scope>
</snippet>