 otherwise the PCRE negative error number. Here is an example
of an interactive <b>pcretest</b> run.
<pre>
  $ pcretest
  PCRE version 7.0 30-Nov-2006

    re&#62; /^abc(\d+)/
  data&#62; abc123
   0: abc123
   1: 123
  data&#62; xyz
  No match
</pre>
If the strings contain any non-printing characters, they are output as \0x
escapes, or as \x{...} escapes if the <b>/8</b> modifier was present on the
pattern. See below for the definition of non-printing characters. If the
pattern has the <b>/+</b> modifier, 