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Subject Author Date
preg_replace_callback, carrying variables Jeff 07-03-2008
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Posted by Jeff on July 3, 2008, 10:49 am
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 I've been struggling with this for a while.

Here's what I'm trying to do:

private function makeMiniTemplate($ARRAY){

/*

$ARRAY looks like this:
$ARRAY['h']='Some Value';
$ARRAY['mce']='Something else';

*/


$template=<<<allthis
<div>[h]</div>
<div>[mce]</div>
...

allthis;

/*
I want to replace [h] with $ARRAY['h'];
Drives me crazy not to be able to use nowdocs in classes but that's
another story...
*/


$template=preg_replace_callback(
"/\[(.*?)\]/s",
create_function('$matches','echo $ARRAY[$matches[1]];'),
$template);

return $template;
}


So, I don't know how to pass in $ARRAY as $ARRAY is not "scoped" inside
the create_function. It always comes up empty.

I don't see how to do this using callbacks either. I'm a little short of
understanding on how this works. I've tried a number of different
approaches.

How do I do this?

Jeff

Posted by Olaf Schinkel on July 3, 2008, 4:01 pm
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 Jeff schrieb:
> I've been struggling with this for a while.
>
> Here's what I'm trying to do:
>
> private function makeMiniTemplate($ARRAY){
>
> /*
>
> $ARRAY looks like this:
> $ARRAY['h']='Some Value';
> $ARRAY['mce']='Something else';
>
> */
>
>
> $template=<<<allthis
> <div>[h]</div>
> <div>[mce]</div>
> ...
>
> allthis;
>
> /*
> I want to replace [h] with $ARRAY['h'];
> Drives me crazy not to be able to use nowdocs in classes but that's
> another story...
> */
>
>
> $template=preg_replace_callback(
> "/\[(.*?)\]/s",
> create_function('$matches','echo $ARRAY[$matches[1]];'),
> $template);
>
> return $template;
> }
>
>
> So, I don't know how to pass in $ARRAY as $ARRAY is not "scoped" inside
> the create_function. It always comes up empty.
>
> I don't see how to do this using callbacks either. I'm a little short of
> understanding on how this works. I've tried a number of different
> approaches.
>
> How do I do this?
>
> Jeff

Maybe Iīm blind :-) Or I donīt understand your question....
But to replace ALL [h] with $a:
$t = str_replace("[h]", $a, $t);




Posted by Michael Fesser on July 4, 2008, 2:11 pm
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.oO(Jeff)

>I'd like to replace [h] with $a['h'], similarly [p] with $a['p']...

Quick 'n dirty:

<?php
$template = 'some [foo] stuff';
$values = array(
'foo' => 'bar'
);

function replace($matches) {
global $values;
$name = $matches[1];
return isset($values[$name]) ? $values[$name] : '';
}

$result = preg_replace_callback('/\[(.+?)]/', 'replace', $template);
var_dump($result);
?>

Micha

Posted by Jeff on July 4, 2008, 3:14 pm
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Michael Fesser wrote:
> .oO(Jeff)
>
>> I'd like to replace [h] with $a['h'], similarly [p] with $a['p']...
>
> Quick 'n dirty:
>
> <?php
> $template = 'some [foo] stuff';
> $values = array(
> 'foo' => 'bar'
> );
>
> function replace($matches) {
> global $values;

Thanks. I had given up just prior to reading your post and had already
gone "global". I'd also determined that it couldn't be done without a
callback (at least I couldn't!).

Jeff

> $name = $matches[1];
> return isset($values[$name]) ? $values[$name] : '';
> }
>
> $result = preg_replace_callback('/\[(.+?)]/', 'replace', $template);
> var_dump($result);
> ?>
>
> Micha

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