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Message-ID: <40C60042.5000608@velum.net>
Date: Tue, 08 Jun 2004 14:06:58 -0400
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To: Robert Janeczek <rashid@ds.pg.gda.pl>
Cc: internals@lists.php.net
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Subject: Re: 'false' - boolean interpratation
From: hans@velum.net (Hans Lellelid)

Robert Janeczek wrote:
> is there any way that string 'false' (and its variations with capital
> letters) could be interpeted as boolean of value false? i have xml
> configuration file that has some switches (true/false) in it. when i use
> this values in functions that require booleans i get true every time (as
> string isn`t empty) :/ i hoped that at least with explicit type cast i could
> go around this problem, but i didn`t help.
> how about adding this special case to conversion rules? creating if`s around
> such code doesn`t make me happy at all :]

IMO better as userland function/method (this is extract from a Phing class):

     ...
     private static $TRUE_VALUES = array("on", "true", "t", "yes");
     ...

     public function booleanValue($s) {
         if (is_bool($s)) {
             return $s; // it's already boolean (not a string)
         }
         // otherwise assume it's something like "true" or "t"
         $trimmed = strtolower(trim($s));
         return in_array($trimmed, self::$TRUE_VALUES);
     }


Hans