PHP is_double() Function

Example

Check whether a variable is of type float or not:

<?php
$a = 32;
echo "a is " . is_double($a) . " ";

$b = 0;
echo "b is " . is_double($b) . " ";

$c = 32.5;
echo "c is " . is_double($c) . " ";

$d = "32";
echo "d is " . is_double($d) . " ";

$e = true;
echo "e is " . is_double($e) . " ";

$f = "null";
echo "f is " . is_double($f) . " ";

$g = 1.e3;
echo "g is " . is_double($g) . " ";
?>

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Definition and Usage

The is_double() function checks whether a variable is of type float or not.

This function is an alias of is_float().

Syntax

is_double( variable);

Parameter Values

Parameter	Description
variable	Required. Specifies the variable to check

Technical Details

Return Value:	TRUE if variable is a float, FALSE otherwise
Return Type:	Boolean
PHP Version:	4.0+

❮ PHP Variable Handling Reference