is_long

The is_long() function in PHP is simply an alias of is_int() - for full details see the is_int() function.

gettype

The gettype() function in PHP returns the type of a variable.

PHP

echo gettype(true);
// => boolean

Ruby

puts true.class;
# => TrueClass

is_real

The is_real() function in PHP is simply an alias of is_float() - for full details see the is_float() function.

is_string

The is_string() function allows you to check if a particular variable is a string (type).

PHP

$string1 = 'Hello World';
var_dump( is_string($string1) );
// => true

Ruby

string1 = 'Hello World';
puts string1.is_a?(String);
# => true

is_numeric

The is_numeric() function allows you to check if a particular variable is a numeric string. Numeric strings can consist of a sign, any number of digits, a decimal part and an exponential part.

PHP

$my_string = '+1.998';
var_dump( is_numeric($string1) );
// => true

Ruby

def is_numeric?(num)
    true if Float(num) rescue false;
end
 
my_string = '+1.985';
puts is_numeric?(my_string);
# => true

is_int

The is_int() function allows you to check if a particular variable is an integer (type).

PHP

$number = 9.5;
var_dump( is_int($number) );
// => false

Ruby

number = 9.5;
puts number.is_a?(Integer);
# => false

is_bool

The is_bool() function allows you to check if a particular variable is a boolean (type).

PHP

$my_variable = 1;
var_dump( is_bool($my_variable) );
// => false

Ruby

 my_variable = 1;
puts my_variable.is_a?(FalseClass) || my_variable.is_a?(TrueClass)
# => false

is_float

The is_float() function allows you to check if a particular variable is a float (type).

PHP

$number = 6.5;
var_dump( is_float($number) );
// => true

Ruby

number = 6.5;
puts number.is_a?(Float);
# => true