Variable Variable wont work with array

Question

I'm trying to do a variable variable, but it wont work when I use it in the code below.

I keep getting:

Notice: Undefined variable: C in C:\web\apache\htdocs\cats-test.php on line 8

This only wont work when used with an array. Can you help?

$Consumer = array(
"a" => "Apparel",
"b" => "Books & Stationary",
);
$cat = "Consumer";

echo $$cat['a']; //I'm trying to make this $Consumer['a'];

deceze · Accepted Answer · 2012-12-12 14:17:07Z

1

echo ${$cat}['a'];

It's ambiguous whether you mean $$cat ['a'] or $ $cat['a']. Use brackets.

answered Dec 12, 2012 at 14:17

deceze♦

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Comments

Thomas Ruiz · Accepted Answer · 2012-12-12 14:17:52Z

1

Be aware of operator priorities. ${$cat}['a'] should work better.

answered Dec 12, 2012 at 14:17

Thomas Ruiz

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Comments

Michael Berkowski · Accepted Answer · 2012-12-12 14:17:00Z

0

When accessing an array key in a variable variable, enclose the variable in {} to be certain that PHP expands the correct set of characters ($cat) as a variable.

echo ${$cat}['a'];
// Apparel

answered Dec 12, 2012 at 14:17

Michael Berkowski

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