switch(true) {
case preg_match('/foo.*?bar/i', $data):
/** stuff **/
break;
case preg_match('/baz/', $data);
/** other stuff **/
break;
default:
break;
}?
On Tuesday, October 14, 2003, at 10:58 AM, Andrey Hristov wrote:
Hi David, 2 weeks ago Hartmut Holzgraefe had similar idea : switch ($data, "preg_match") { case '/foo.*?bar/i' : /* computation here */ break; }
The second argument is a callback.
Andrey
David Sklar wrote:
I was thinking about adding one or two regex-related features to the engine:
1. "preg_case": this would behave just like case but instead of doing an
equality comparison, would match against a regular expression, e.g.
switch($data) { preg_case '/^\d{5}(-\d{4})?$/': print "US Postal Code"; break; preg_case '/^[a-z]\d[a-z] ?\d[a-z]\d$/i'; print "Canadian Postal Code"; break; default: print "something else!"; }
Where should any captured subpatterns go?
2. A regex match operator that returns an array containing subpatterns. If
there is no match against the regex, then an empty array (or just false?)
would be returned.
if ($data =~ '/^(\d{5})(-\d{4})?$/') { print "The whole postal code is $data[0]."; print "The first five digits is $data[1]."; if ($data[2]) { print "The ZIP+4 is $data[2].";} }
Some issues with adding these features:
- It creates an engine dependency on the PCRE library.
- There would have to be some new opcodes and parser tokens
- Ideally the code that implements these operators could share as much as
possible with what's already been done in the PCRE extension -- is that
possible?
Comments?
Thanks, David
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