[PHP] Best way to check for some certain text in a string

[José Jeria]

I want to find a certain text in a string and i want it to return me a
boolean.
What is the best thing to do this?

a) ereg("search for this", $string);                            // returns
int(1) if true, bool(false) if not
b) strpos($nav->userAgent, "search for this") > 0    // gives me a boolean
directly

Any tips of which one I should use?

/José Jeria



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