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From: Sandman <mr@sandman.net>
Newsgroups: comp.lang.php
Subject: Re: variable replacement in string
Date: Thu, 10 May 2012 16:10:14 +0200
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Message-ID: <mr-739F0E.16101410052012@News.Individual.NET>
References: <a11rgoFph0U1@mid.uni-berlin.de>
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In article <a11rgoFph0U1@mid.uni-berlin.de>,
 "M. Strobel" <sorry_no_mail_here@nowhere.dee> 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.

Before coding PHP I used Roxen and their "RXML" language, which was 
pretyt much just fancy HTML (RXML stood for Roxen Markup Language) and 
they had variable templating in strings. When moving to PHP I missed 
this.

So I have this templet string for headline formatting in blog posts 
(for instance):

    $template = "<h2>#headline#</h2>
     #date#, <span class='subline'>#category#</span>";

And then I have an array with the blog post:

    $article = array(
        "headline" => "Hello world!",
        "date" => "2012-04-23",
        "category" => "Fun stuff"
    );

And I have this function I call "parserxml()" which is "Parse rxml" 
not "parser xml" :)

    function parserxml($string, $var = false) {
        # RXML 1.0
        $string = preg_replace("/#([a-z]+)#/se", "\$var['\\1']", 
$string);
        # RXML 2.0
        if (preg_match_all("/&([a-z_A-Z]+)\./i", $string, $matches)) {
            foreach($matches[1] as $m) {
                global $$m;
            }
            $string = 
preg_replace("/&([a-zA-Z_]+)\.([a-zA-Z_]+);/sei", "\${\\1}['\\2']", 
$string);
        }
        return $string;
    }

Which I use as such:

    print parserxml($template, $article);

You may also note that there is support for "RXML 2.0" in that 
function as well, which used a slightly different syntax that could 
define scope as well:

    $template = "<h2>#headline#</h2>&user.name;"

The second part would globalize $user and replace that with 
$user["name"].



-- 
Sandman[.net]