curly bracket, variable variable

[muppet77]

Hi,

 

I have

$rankseasoncart[0] = 3;

$rankseasoncart[1] = 4;

$rankseasoncart[2] = 5;

and i want to write a piece of code so i can call each one separately by having a variable inside the square brackets.

 

This doesn't work at all

 

$numbera=1;

 

echo ${"rankseasoncart[".$numbera."]"};

 

what silly error have I made?

 

if i do

echo $rankseasoncart[1];

as a test, it works fine!

 

 

thanks.

Edited April 4, 2018 by muppet77

[requinix]

Variable variables are just that: for variables. Not array values.

 

Regardless, there's no good reason to use variable variables here. Keep it as the array it is.

[muppet77]

Hi and thanks.

It’s part of a bigger script where I need to change $numbera frequently.

Can it be done?

[muppet77]

sorted.

 

echo $rankseasoncart[$numbera];

[Psycho]

If you are wanting to reference specific indexes, then that would seem to me that those indexes have specific meanings. An incrementing integer index should typically be used for an array when the values are a list of the same types of objects (e.g. a list of products in a shopping cart). However, if the items in an array are distinct items that have specific meaning, then I would highly suggest using named indexes. An example could be an array that holds a user's last product, most ordered product, favorite product, etc. Using a numeric based index for those values requires anyone working on the code to "know" what each of those numeric indexes mean. It is far easier and intuitive to use something like this

 

$rankseasoncart['last_prod'] = 3;
$rankseasoncart['most_prod'] = 4;
$rankseasoncart['favorite_prod'] = 5;