In what scenarios would using the strpos function be more suitable than str_contains for detecting specific keywords in PHP variables?

The strpos function is more suitable than str_contains for detecting specific keywords in PHP variables when you need to know the exact position of the keyword within the string. If you only need to check the presence of a keyword in a string without caring about its position, str_contains is more efficient. However, if you need to perform additional actions based on the position of the keyword, strpos is the better choice.

$haystack = "The quick brown fox jumps over the lazy dog";
$needle = "fox";

if (strpos($haystack, $needle) !== false) {
    echo "The keyword '$needle' was found at position " . strpos($haystack, $needle);
} else {
    echo "The keyword '$needle' was not found in the string.";
}