遇到非数字值

Question

I have this line, but i don't know what to change to skip this error

$media_query = '@media screen and (max-width: ' . intval( Avada()->settings->get( 'side_header_break_point' ) ) - 32 . 'px)';

Answer 1

You need to pay attention to the order of operation as :

the dot operator has the same precedence as + and -, which can yield unexpected results.

So in your case you have 'maybe' formed two strings before applying the minus operation, to avoid this you need to add parenthesis like this :

'(max-width: ' . (intval( Avada()->settings->get( 'side_header_break_point' ) ) - 32) . 'px)';

You can learn more here : http://php.net/manual/fa/language.operators.precedence.php