preg_replace with "eval"?

From: Sven (google_at_hofrichter.net)
Date: 10/20/04

  • Next message: pat: "regular expression to replace \n with <br>" 
    Date: 20 Oct 2004 05:10:09 -0700

    Hi,

    I tried to code a "one-line"-replacment-function, that put a found
    value into a variable and deletes it from string. I know, it is
    possible to do it by using a help-function (example 2), but I'm
    looking for a "shorter" way.

    $subject = "Re: PUT: an answered mail";

    [example 1]
    $subject = preg_replace(
    "/^((Re|AW):\s*)/ie","\$isanswer='\$1'",$subject );
    => I wanted to get:
       - $isanswer="Re: "
       - $subject ="PUT: an answered mail"
    => but I got:
       - $isanswer="Re: "
       - $subject ="Re: PUT: an answered mail"

    [example 2]
    $subject = preg_replace(
    "/^((Re|AW):\s*)/ie","setAnswer(\$1)",$subject );
    function setAnswer( $val ) { \$isanswer='\$1'; return ""; }
    -> I wanted to get and got it:
       - $isanswer="Re: "
       - $subject ="PUT: an answered mail"

    Any ideas to filter it shorter (with an higher performance).

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