PHP is_float()、 is_double()、is_real()函数

The is_callable() function is used to detect whether a variable is of floating point type.

Alias ​​functions: is_double(), is_real().

Note: If you want to test whether a variable is a number or a string of numbers (such as form inputs, which are usually strings), you must use is_numeric() .

PHP version requirements: PHP 4, PHP 5, PHP 7

grammar

 bool is_float (mixed $var)

Parameter description:

$var: The variable to be tested.

return value

Returns TRUE if the specified variable is a float, otherwise returns FALSE.

Example

Example

The output is:

 This is a floating point value bool(false)bool(false)bool(false)bool(false)