is_float

Definition and usage

is_float() function checks whether the variable is of type float.

If the variable's type is float, the function returns true (1), otherwise false .

Example

Check whether the variable is float type:

 <?php
$a = 32 ;
echo "a is " . is_float ( $a ) . "<br>" ;

$b = 0 ;
echo "b is " . is_float ( $b ) . "<br>" ;

$c = 32.5 ;
echo "c is " . is_float ( $c ) . "<br>" ;

$d = "32" ;
echo "d is " . is_float ( $d ) . "<br>" ;

$e = true ;
echo "e is " . is_float ( $e ) . "<br>" ;

$f = "null" ;
echo "f is " . is_float ( $f ) . "<br>" ;

$g = 1.e3 ;
echo "g is " . is_float ( $g ) . "<br>" ;
?>

Try it yourself

Note that even if the variable g is represented using scientific notation, it is still considered float type, so is_float($g) returns TRUE .

grammar

 is_float ( variable ) ;