title: Complex regex to get the number in curly braces in a string
body: <p>I need to get the number in curly braces in a complex string. Basically I am parsing some data, and I need to extract the ids that are represented in a curly braces.</p>
  
  <p>Example string:</p>
  
  <pre><code>{1|{1078} {*|{1079}-}test{1|{4829}, test2 {4457}}} {*|{1078} {*|{1079}-}test3{1|{4829}, test4 {23232}}}
  </code></pre>
  
  <p>What I exactly need is to extract the number in curly braces that is near the pipe (|{4829}, |{1079}, |{1078}), and not any others numbers, so my end result would be something like: </p>
  
  <pre><code>4829,1079,1078
  </code></pre>
  
  <p>or array of this numbers, it does not matter. It should be unique values but that is not problem for me. My problem is create regex that will just extract those numbers. I have tried a lot of stuff during this day, latest one what I have tried is this:</p>
  
  <pre><code>public static function getAllAttributeIDsFromTheRule($attributeValues)
  {
  
      preg_match_all('/{(.*?)}/', $attributeValues, $matches);
      preg_match_all('\|{\d*}', $attributeValues, $matches[1]);
  
      $attributeIDsWithPipe = (implode('', self::clean($matches[1])));
  
      $attributeIDs = explode('|', $attributeIDsWithPipe);
  
      var_dump($attributeIDs);
  
  }
  
  public static function clean($string) 
  {
      $string = str_replace(' ', '-', $string);
  
      return preg_replace('/[^A-Za-z0-9|\-]/', '', $string);
  }   
  </code></pre>
  
  <p>But I am always stuck with one other character in the result.In some result I get number extra or something like that. Now, it is time to ask for help if someone knows the better approach. Much appreciated.</p>