What are the differences between using is_int() and other integer-checking functions in PHP?

When checking if a variable is an integer in PHP, you can use the is_int() function or other integer-checking functions like is_numeric() or ctype_digit(). The main difference between is_int() and the other functions is that is_int() specifically checks if the variable is of type integer, while is_numeric() and ctype_digit() check if the variable is a numeric value that can be converted to an integer. It's important to choose the appropriate function based on the specific requirements of your code.

// Using is_int() to check if a variable is an integer
$var = 10;

if (is_int($var)) {
    echo "Variable is an integer";
} else {
    echo "Variable is not an integer";
}