The goal is to include the $width variable within the width style attribute and ensure it's followed by "px." Unfortunately, attempts to separate the variable and "px" with a space or join them together resulted in errors.

Solution 1: Concatenation

One approach to fix this issue is using concatenation, as demonstrated below:

$bla = '
';
In this instance, the concatenation operator (.) combines the variable with the string fragments, ensuring the desired output.
Solution 2: Double Quotes
Alternatively, you can employ double quotes and dollar signs within the string:
$bla = "<div class=\"vote_pct\" style=\"width: ${width}px;\">";
By using ${width}, the variable's value is correctly interpolated into the string.