</i> Perl-compatible). Note that the main, Perl-compatible,
matching function is <b>pcre_exec()</b>. The arguments for this function are:
<pre>
  <i>code</i>         Points to the compiled pattern
  <i>extra</i>        Points to an associated <b>pcre_extra</b> structure,
                 or is NULL
  <i>subject</i>      Points to the subject string
  <i>length</i>       Length of the subject string, in bytes
  <i>startoffset</i>  Offset in bytes in the subject at which to
                 start matching
  <