美元符号和数字（Joomla + Jumi）

Question

I have db with this string content:

[$3] [$ 3] [$3.2]

Need to echo it as it is.

When try to echo

echo "[$3] [$ 3] [$3.2]";

got this:

[] [$ 3] [.2]

Tried urlencode, htmlspecialchars, but didn't succeed.

How do I echo and get this?

[$3] [$ 3] [$3.2]

EDIT:

single quotes is not giving wanted result.

echo '[$3] [$ 3] [$3.2]';

[] [$ 3] [.2]

My php version is 5.2.14 and I am using Joomla.

EDIT2:

I figured out, the reason it's not working with single quotes is because of Joomla + Jumi. If I use pure php - it works ok.

Answer 1

Use single quotes if you don't want the variable values to be interpolated.

From the PHP manual:

Note: Unlike the double-quoted and heredoc syntaxes, variables and escape sequences for special characters will not be expanded when they occur in single quoted strings.

echo '[$3] [$ 3] [$3.2]';

The quotes shouldn't matter for this particular case as PHP variables can't start with numbers.

For example:

echo '[$3] [$ 3] [$3.2]'; // single-quoted

will have the same effect as:

echo "[$3] [$ 3] [$3.2]"; // double-quoted

And both should output:

[$3] [$ 3] [$3.2]

But, for valid variables, the above rules apply.

Example:

$var = 'foo';
$string = 'this is a string with $var';
echo $string;

Output:

this is a string with $var

Demo!