fastest needle/haystack function

[Anon]

To find needle in haystack where needle is a multi-character string, which is the best string function to use? I've skimmed through the function reference and there seem to be several str functions that accomplish the same thing. Is there one that is faster/more efficient than the others?

Thanks for your help.

[Anon]

Hi!
I think strpos() is one of the fastest. If you know C, you can look at its source code. I guess it's taken from C so it's the best you can get. It's a little bit tricky to use when the occurrence of the needle is at position 0 in haystack, and the solution differs in versions 3 and 4 (seee Help), but that's fixable. Sometimes not to worry my head I just do this:
if (strpos(" ".$mystring, "b") > 0) ...
String concatenation is not that slow but I think you should benchmark this 10000 times or more to see whether string concatenation has some speed impact here.

Best regards,
Stanislav