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  Searching for substring with strpos vs perl-style regex
strpos x 1.77 faster 0.0031 preg_match 0.0055
  Searching for substring with perl-style regex vs ereg
preg_match x 2.62 faster 0.0061 ereg 0.0160

Testing PHP 4.3.3 Completed on Linux. Benchmark done on: 01-Mar-2004 12:36:01

(c) 2003-2004 John Lim PHP Benchmark Suite (PHP BS 1.0).