is_float in PHP

is_float — Finds whether the type of a variable is float

Syntax: bool is_float ( mixed $var )
Finds whether the type of the given variable is float.
Note:
To test if a variable is a number or a numeric string (such as form input, which is always a string), you must use is_numeric().

Parameters: 
var:The variable being evaluated.
Return Values:
Returns TRUE if var is a float, FALSE otherwise.
Example #1 
<?php
if (is_float(27.25)) {
    echo "is float\n";
} else {
    echo "is not float\n";
}
var_dump(is_float('abc'));
var_dump(is_float(23));
var_dump(is_float(23.5));
var_dump(is_float(1e7));  //Scientific Notation
var_dump(is_float(true));
?>
Output:

is float
bool(false)
bool(false)
bool(true)
bool(true)
bool(false)

is_double — Alias of is_float