How can PHP developers ensure that their code is flexible enough to handle both numbers and strings when using strpos or stripos functions?

When using strpos or stripos functions in PHP, developers can ensure their code is flexible enough to handle both numbers and strings by first converting the input into a string using the strval function. This way, regardless of whether the input is a number or a string, it will be treated as a string when searching for a substring. By converting the input to a string beforehand, developers can avoid potential type mismatches and ensure their code can handle both numbers and strings seamlessly.

$input = 123; // Input can be either a number or a string
$search = '23'; // Substring to search for

// Convert input to string
$inputStr = strval($input);

// Search for substring in the converted string
$position = strpos($inputStr, $search);

if ($position !== false) {
    echo "Substring found at position: $position";
} else {
    echo "Substring not found";
}