On Wed, May 17, 2006 11:37 am, René Fournier wrote:
> Looking for suggestions on the most compute-efficient way to search
> variable-length strings (~200 characters) for the occurrence of one
> of about 100 possible needles. In other words:
>
> $needles = array ( 1 => "Hello Jim" , 2 => "Yellow Banana" , 3 =>
> "Red Car", ... etc .... (100 elements)
>
> $haystack = "Once upon a time there was a programming language that
> everyone loved. Its name was PHP, and the people that worked with it
> also liked Yellow Bananas. One day...";
>
> Now perhaps I'm blind, but I can't see an obvious string or array
> function that simply allows you to use an array as a needle while
> searching a string haystack. What I'm really looking for is something
> like the reverse of in_array.
>
> The obvious thing would be to loop through the needles and run
> substr_count on the haystack... But is there a faster way?
//Kind of a hack, I guess, but might be decently fast:
$pattern = implode('|', $needles);
if (preg_match("/($pattern)/", $haystack, $matches)){
var_dump($matches);
}
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