title: Extracting alphanumeric phrase from a string
body: <p>Trying to extract the alphanumeric characters from this string:</p>
  
  <pre><code>A_phase_I-II,_open-req_project_id_PX15RAD001
  </code></pre>
  
  <p>The problem is: the term <strong>PX15RAD001</strong> can occur anywhere in the string. </p>
  
  <p>Trying to extract the alpha-numeric part using the below expression. But this returns the entire string. I thought Alum was a valid keyword for alpha-numerics. Is that not the case? </p>
  
  <pre><code>(my $string = $line ) =~ s/\P{Alnum}//g;
    print $string;
  </code></pre>
  
  <p>How can I extract the alphanumeric part of the afore mentioned string?</p>
  
  <p>Thanks in advance.
  -simak</p>