Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!news.musoftware.de!wum.musoftware.de!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: Sandman <mr@sandman.net>
Newsgroups: comp.lang.php
Subject: Re: variable replacement in string
Date: Fri, 11 May 2012 16:06:37 +0200
Lines: 103
Message-ID: <mr-17DD6B.16063711052012@News.Individual.NET>
References: <a11rgoFph0U1@mid.uni-berlin.de> <jogefj$6q5$1@news.metronet.hr> <a11su1F3j9U2@mid.uni-berlin.de>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
X-Trace: individual.net W8WVnYslxUBhmDYuYTKvJArbJfIdAxCUNA54/SmL7SylqHGLWYSsBEwCLIowYlXmg=
X-Orig-Path: mr
Cancel-Lock: sha1:dcj1X/zHT0WctdtP+pHk5hl5flM=
User-Agent: MT-NewsWatcher/3.5.2 (Intel Mac OS X)
X-Face: $@,Vfa$,)%=Qa7L]y)&oZj_\EiHc}}A<Y3TvbI2&|e"bE9zc[o<ThMgB4%*L$b1YsNl!/ <lHO$>f0Bei"4a_%)"c6TQ+P/:53>;PNGuWUmkqyeN-qM65foJ[;T_(k;>]&G\T4Lhm:2 ujye2_,iUJFE;NZn>y;.|-hl7g~bIOF1qG\o<?]4mXkW*mT3]{Bn&VwP7(M0uYnGA!V!? {"y?BkBDW6e-.=I5
X-Killfiled: yttrx, gallopinginsanity.com, Mark Kent, Maverick, NRen2, weedhopper, PC Guy, nospam@nospam.com, Oxford, Jim Lee Jr., Mocassin Joe, Chance Furlong, XX, Uncle Max, Joe Pain, ed <news@atwistedweb.com>, MuahMan, Redjak, isquat@gmail.com, Robert Whelan, jt2002a@hotmail.com
Xref: csiph.com comp.lang.php:5964

In article <a11su1F3j9U2@mid.uni-berlin.de>,
 "M. Strobel" <sorry_no_mail_here@nowhere.dee> wrote:

> Am 10.05.2012 15:05, schrieb Goran:
> > On 10.5.2012 14:44, M. Strobel wrote:
> >> Hi,
> >>
> >> I am still searching a function in PHP to execute variable replacement in 
> >> strings.
> >> Other languages do have this, but for PHP I can only find sprintf() and 
> >> string replace.
> >>
> >> I have
> >>
> >> $t = ' - solved - ';
> >> $msg = 'The problem is $t';
> >>
> >> I want now:
> >>
> >> echo fxx($msg);
> >>
> >> print out  "The problem is  - solved - ".
> >>
> >> Please don't tell me about $msg = "The problem is $t"; just think of $msg 
> >> like a
> >> template read from a file.
> >>
> >> /Str.
> > 
> > strtr() ?
> > 
> > You could do something like this:
> > 
> > $template = 'Your name is %given_name% %family_name%';
> > 
> > echo strtr($template, array(
> >     '%given_name%' => 'John',
> >     '%family_name%' => 'Doe',
> >     ));
> 
> yeah, create my own variable system. No easier way?
> 
> /Str.

TESTED:

#!/usr/bin/php
<?

    $t = "SOLVED";
    $template = 'The problem is $t';
    
    print fxx($template);
    
    function fxx($string){
        if (preg_match_all("/\\$([a-z_A-Z]+)/i", $string, $matches)) {
            foreach($matches[1] as $m) {
                global $$m;
            }
            $string = preg_replace(
                "/\\$([a-zA-Z_]+)/sei",
                "\${\\1}",
                $string
            );
        }
        return $string;
    }
?>

Of course, having posted that, I'd still use caution with scopes and 
globilzation of variables, since this function may be called inside 
another function which hasn't globalized $t, so I would still 
recommend to send along a variables of values:


#!/usr/bin/php
<?

    $values["t"] = "SOLVED";
    $template = 'The problem is $t';
    
    print fxx($template, $values);
    
    function fxx($string, $values){
        $string = preg_replace(
            "/\\$([a-zA-Z_]+)/sei",
            "\$values['\\1']",
            $string
        );
        return $string;
    }
?>

And using single quotes when creating the template is important as 
well, since we're using PHP-style variables. If you have your own 
variable denotation, you don't have to think about that at all (see my 
earlier parserxml() function)




-- 
Sandman[.net]