e</span> <span class="identifier">flags</span>
                    <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span></code>
                  </p>
                </td>
<td>
                  <p>
                    Performs a search and replace operation: searches through the
                    string <span class="emphasis"><em>in</em></span> for all occurrences of the current
                    expression, for each occurrence replaces the match w