Making a string into a variable

[Nexus10]

<?php $learn_textiles_lvl = 5; // original variable
$a = "$"."learn_".$industry."_lvl"; // attempt at reconstructing original variable when only $industry is known (it is not always 'textiles')
$current_level = $a; // test
echo("<br />Current level: $current_level"); ?>

 

How do I construct a variable and get its contents (existing) from a string function (or other way)? I.e. I have the varible $industry and need to get the contents of an existing variable called $learn_(INDUSTRY)_lvl where INDUSTRY is defined in the variable $industry.

 

[kenrbnsn]

You want to use variable variables

 

Ken

[Nexus10]

I'm still confused by that.

[Nexus10]

$industry = "Textiles";
$a = ${$industry};
echo("<br />a: $a");

 

$a is then blank. ?

[kenrbnsn]

That is looking for a variable named $Textiles. Is there one?

 

Ken

[Nexus10]

No, I have a variable $industry which holds the value 'textiles' (but it also holds 20 other values as well at different times).

[kenrbnsn]

Try this:

<?php
$industry = 'textiles';
$learn_textiles_lvl = 5; // original variable
$a = ${'learn_' . $industry . '_lvl'}; // attempt at reconstructing original variable when only $industry is known (it is not always 'textiles')
$current_level = $a; // test
echo("<br />Current level: $current_level");
?>

 

Ken