How do I include a yet to be defined variable inside a string? PHP

Question

For sake of performing less database queries and for clarity of code, I'd like include a yet to be defined variable inside a string. Later in the page, the variable will be declared and the string printed and evaluated. How do i do this?

$str="This $variable is delicious";

$array=array("Apple","Pineapple","Strawberry");

foreach($array as $variable)
{
  print "$str";
}

Answer 1

You can use printf() (or sprintf() if you don't want to echo it):

$str = 'This %s is delicious';

foreach ($array as $variable) {
    printf($str, $variable);
}