How does the strcmp() function differ from using == for string comparison in PHP?

When comparing strings in PHP, using the == operator may not always give the desired result because it compares the values of the strings without considering their types. This can lead to unexpected outcomes, especially when comparing strings that contain numbers. To ensure a proper string comparison that considers both the values and types of the strings, it is recommended to use the strcmp() function.

$string1 = "10";
$string2 = 10;

// Using the == operator for string comparison
if ($string1 == $string2) {
    echo "Strings are equal using == operator";
} else {
    echo "Strings are not equal using == operator";
}

// Using the strcmp() function for string comparison
if (strcmp($string1, $string2) === 0) {
    echo "Strings are equal using strcmp() function";
} else {
    echo "Strings are not equal using strcmp() function";
}