Re: Arrays and Regs

From: Date: Fri, 19 Jul 2002 02:18:15 +0000
Subject: Re: Arrays and Regs
Groups: php.general 
Request: Send a blank email to php-general+get-108409@lists.php.net to get a copy of this message
>Just a performance question, if anyone knows for sure. Within a large >array, would using numerical indices be quicker than associative? I'm >talking about a *noticeable* difference in performance, here. Almost for sure, nope. Run a test for yourself. >Also, on Regular Expression replacements: > >$text = eregi_replace("([abc]+)", "<span style=\"color: >red\">\\1</span>", $text); > >Would this replace any occurences of the pattern with the same pattern >match in red text? I'm not sure exactly how the \\1, \\2, etc. works. So, does: Yes, for those browsers that understand the span tag. A quick test script in PHP would have been faster than asking... :-) >$text = eregi_replace("(a)(b)(c)", "\\1", $text); > >Does this output only the 'a'? I find this confusing for some reason, >hehe. Any help would be great! Yes. If you had \\2 and \\3 somewhere, they'd be 'b' and 'c' respectively. Again a quick test script in PHP would have been faster... -- Like Music? http://l-i-e.com/artists.htm

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