PHP中的乘法值

Question

I have this pieces of php here...

The value that gets written in HTML is this $16.67.

I am not sure what value type this is, not sure if it is a string or integar.

Regardless, I need to take this value and increase it by 3%.

I tried this but to no avail:

<?php echo $row['display_price' * 1.03]; ?>

If someone could help me out here this would be great.

Answer 1

You are trying to multiple display_price string and use it as array key and you should just increase the value that the variable holds.

echo $row['display_price'] * 1.03;

If variable holds the dollar sign too (it shouldn't!) use this regex to get the value and multiply it. Example:

echo "$" . ( floatval( preg_replace( "/[^-0-9\.]/", "", $var ) ) * 1.03 );