The strval() function can be used to change an integer into a string.
From a maintenance standpoint, your goal is more clear than some of the other, more esoteric solutions. Naturally, it depends on the situation.
$var = 5;
// Inline variable parsing
echo "I'd like {$var} waffles"; // = I'd like 5 waffles
// String concatenation
echo "I'd like ".$var." waffles"; // I'd like 5 waffles
// The two examples above have the same end value...
// ... And so do the two below
// Explicit cast
$items = (string)$var; // $items === "5";
// Function call
$items = strval($var); // $items === "5";
I hope this helps you.