Echo the function's return value of a class or object in php? -

i'm beginning php , understand in order parse variables echo must enclosed between double quotation marks. when run script:

echo "you have: money::add($coin1, $coin2)<br>"; //"add" returns integer 

i error saying can't convert class money string. know can rewritten this:

echo 'you have: ' . money::add($coin1, $coin2) . '<br>'; 

but when there lots of return values, variables , on involved echo, wonder if there i'm missing make code cleaner , shorter.

you need modify this

 $money = new money; //create object class money   $result=$money->add($coin1, $coin2) //call function   echo 'you have: ' .$result . '<br>';