Very useful variable definition but very weird

[NomikOS]

I remember having used something like this:

$'selected'.$_GET['id] = ' selected';

OR

$"selected{$_GET['id]}" = ' selected';

How is it?

[omoutop]

sounds like a Variable variables issue

check on this [us2.php.net] if that's is the case

[barns101]

Curly braces are also used to explicitly define your variables if there could be any ambiguity: [uk.php.net...]

[jatar_k]

the links are god reading, the answer< i think, is like this, concatenate between braces

${'selected' . $_GET['id']} = ' selected';

[NomikOS]

&&... yes. it is:

${'selected' . $_GET['id']} = ' selected';

you can not say it's trivial but very useful, right?

"thanks for your help {$colegas}" && for jatar_k --the bible.

[bkeep]

I use something similar for setting the column names as my variable name so when I add a new column to the db it is automatically added to the variables list with the column contents

$env = getEnvSettings();
foreach ($env as $field => $value ) {
${$field} = $value;
}

[jatar_k]

>> you can not say it's trivial but very useful, right?

I use variable variables for anything I can but it doesn't come up very often. Mostly I use them for working with variable amounts of data either in variables or in arrays.

[NomikOS]

I used forget all about this construction, but no more. Thanks.

Another use:

 for ($i = 1; $i <= 20; $i++) 
 { 
  $img = $listing->{'images'.$i}; 
  if ($img) 
   echo "Picture[$i] = '{$img}_lg.jpg';\n"; 
 }