Concatenating strings in arguments (php)
your following statement will work fine:
$o = get_post_meta($id, 'locationForDay'.$i, true);Although, if you are unsure you can always throw parenthesis around a string:
$o = get_post_meta($id, ('locationForDay'.$i), true);Edit: It should be worth noting that it is possible to concatenate strings using a comma (,). Therefore the following statement would NOT work:
$o = get_post_meta($id, 'locationForDay',$i, true);Whereas, the above statement would call the function get_post_meta and contain 4 arguments. In this instance it would be crucial to include the parenthesis in order to achieve your string concatenation:
$o = get_post_meta($id, ('locationForDay',$i), true);
$o = get_post_meta($id, ('locationForDay'.$i), true);or
$o = get_post_meta($id, ('locationForDay'.$i.''), true);or
$o = get_post_meta($id, ('locationForDay',$i,''), true);
Yes, you can concat variables as they are being passed into a function like that.