Question

how to concat array index value as if i have two var

 $string='helloworld';

and

$number=1

how would i concat them in aray value like $array[$string+$number]=$value(some value variable) but it give me result like $array[1]=

  $string="helloworld;
    $number=1;
    $array[$string+$number]=$value;

result,

  $array[1]=...

i tried it by all ways by using , too but it does not work

hopes for your suggestions

Answer 1

+ adds numbers. . concatenates strings.

echo "Hello " . "world!";